Universal M-25XPB(C), M-408, M3-20B, M-35B(C), M-508 Operator's Manual

OPERATORS

MANUAL

4.Unlvarsal

-

·

MARINE

DIESEL

ENGINES

M3·20B

M-25XPB(C)

M·35B(C)

M-408 M-508

- -

PUBLICATION

REVISION

AUGUST

NO.

3:

2015

200550

Westerbeke

150

John

JS!j

Corporation-

Hancock

Website:

Member

...

·

Myles

Road-

Taunton,

www.westerbeke.com

National

Marine

Mamifacturen

...

Standish Industrial

MA

02780-7319

Association

Parle

U.S.A.

A

wARNING

Exhaust
colorless
unconsciousness
exposure

•Dizziness

•Nausea

•Headache

•

IF

GET

seek

until

gasses

gas.
can

Weakness

YOU

OR

ANYONE

OUT

INTO
medical
it

has

been

Carbon

include:

and

THE

attention.

·WARN

.

Engfrles

Produce

Regular

CARBON

Maintenance

f'W./'fP'S!BeiCl!

-·-

contain

IN

Required

Carbon

Monoxide

and

death.

Sleepiness

ELSE

EXPERIENCE

FRESH

AIR

Shut

inspected

A
bulkhead

CARBON
living/sleeping

G·

MONOXIDE

obtainable

.

Monoxide,

is

Symptoms

•

Throbbing

•

Muscular

•

Vomiting

•Inability

IMMEDIATELY.
down

and

repaired.

WARNING

WESTERBEKE
WESTERBEKE

They

are

CALIFORNIA

PROPOSITION

65

an

odorless

poisonous

ANY

the

near

MONOXIDE

inexpensive

of

carbon

in

Twitching

to

Think

OF

If

unit

and

DECAL

and

your

also

quarters

at

your

and

Temples

THESE

should

recommends

local

WARNING

and

can

cause

Monoxide

Coherently

SYMPTOMS,

symptoms

do

Is

provided

engine
DETECTORS

and

persist,

not

restart

be

fixed

or

generator.

of youi

easily

marine

by

installing
in
vessel.

store.

to

the

a

Marine

exhaust

are

known

to

cause

and

diesel

and

some

to

the

cancer,

other

reproductive

and

of

State

gasoline

its

constituents

of

California

birth

defects,

harm.

engine

SAFETY

INSTRUCTIONS

INTRODUCTION

Read

this

safety

manual

caused

by

failure

precautions.

take

the

peJ:sonne4

The

following safety instructions are in compliance with

the

American

PRMNT

A

while
these

•

Do

\

enclosures

•

Shut
equipment.

•

Use
equipment.

•

Make

(particularly

•

Remove
electrical

PREVENT

A

exhaust

Know

necessary precautions to protect yourself, your

and your machinery.

Boat and

ELECTRIC

WARNING:

engine

Is

connections!

not

operate

and

off

electrical

insulated

sure

your

shoes)

wristwatch

equipment.

BURNS -HOT

WARNING:

system

veryhotl

•

Monitor

coolant

location

when

engine

recovet}l

on

the

the

engine

AWARNINll:

•

l1'1

case

of

an

before

touching

carefully.

to

follow

fundamental

when dangerous conditions exist and

Yacht

Most

accidents

rules

Council (ABYC) standards.

are

and

SHOCK

Do

not

touch

AC

electricaf

running.

this
covers

mats

Lethal

voltage

machinery without electrical

in place.

power before accessing electrical

·

whenever working on electrical

clothing and skin are dry, not damp

when

handling electrical equipment.

and

all jewelry when working on

connections

is

present

at

·

ENGINE

011

n11t

flluch

hot

engine

c11mponents. A running

ani:i.freezP/coolantieveht the

·tartk

and Periodicaly

water

iS

COLD;

jacketed

~J.Ihaustmiinifold~

· · · . . · .

S~Hm:can,l:at~Se,:JnJiiry"or

,':'

...

tmgine

twerhe&.t,

the

~ngine

·anow

or

cbeeklrig

parts

engine

at

the

...

.-.·.,:

....

_.,.;,.

the

engm¢

the cobiant

11r

gets

plaStic

filler

cap

but

deSthi

··-··'

· ..... .

to

cool

t)nly

PREVENT

A

• Prevent flash
sparks to occur near the fuel injector, fuel line,
pump, or other potential sources of spilled fuel or
vapors. Use a suitable container to catch

. removing the fuel lines or fuel filters.

•

Do
Backfire can cause severe injury or death.

• Do not smoke or permit flames or sparks
the fuel

et~.gine

.

chances of

• Be aware - diesel fuel will burn.

PREVENT

A

fnjury.or

•

Follow
hatches

after
the
your

• All

when
well-ventilated area away from spark-producing
equipment and out of the reach of children.

•

Do

• Shut off

•

· • Be sure all fuel supplies have a positive shutoff

• Be certain fuel line fittings are adequately tightened

• Make sure a fire extinguisher is-installed

BURNS

WARNING:

not operate with the air cleaner/silencer

sysfe~.

'clean and free

-FIRE

Fire

can

cause

injury

or

fires.

Do not smoke or pennit

J(eep

t11e

compartment

of

debris to minimize the

fire.

Wipe up all spilled fuel and engine

death!

flames

all

fuel

removed.

to

occur

8lld

the

filter,

BURNS -EXPLOSION

WARNING:

de;#/.1!

re-fueling safety instructions.

fueling.

blciwer.

engine.

fuel

handling and storing fuels. Store fuel in a

not

the fuel system. Take care in catching
spill. DO NOT allow any smoking,
sources
servicing.
the fuel system.

Do

not alter or modify the fuel system.

free

of leaks.

properly maintained. Be familiar with its proper
Extinguishers rated ABC by the

for

all

applications encountered in this environment.

Explosions

closed

when

Check below for

Run

the

blower per four

vapors

are highly explosive.

fill

the fuel tank(s) while the ,engine while it

the

fuel service valve at

of fire near the

Ensure proper ventilation exists

fueling.

fuel

from

fuel

Open

and

fumes/vapor

the

system or

NFPA

vapors

Keep

the

ventilate

refore

minutes

before

Use

extreme

engine

when

any

fuel

open

flames,

engine

when

when

nearby

are appropriate

can

vessel's

when

the

that

servicing

valve.

or

fuel

fuel

near.

oil.

cause

cabin

running

starting

care

is

running.

servicing

might

or other

and

and

is

use.

I

I

i

SAFETY

INSTRUCTIONS

ACCIDENTAL

A

WARNING:

or

death!

w

Thin

unit's battery selector switch to
engine.

• Make certain. all personnel are clear

starting.

•

Make certain all covers, guards, and hatches are
re-installed before starting the engine.

BATTERY

A

WARNING:

or

death!

• Do not smoke or allow an open flame near the battery
being serviced.
highly explosive gas, which can
arcing or by lit tobacco products. Shut
equipment in the vicinity to prevent electncal arcmg
during servicing.

• Never connect the negative(-) battery cable to the
positive (
Do not test the battery condition by shorting the termmals
together. Sparks could ignite
Ventilate any compartment contammg battenes to prevent

accumulation
disturb the battery charger connections while the battery
is

being charged.

• Avoid contacting the terminals with tools, etc., to prevent
bums or sparks that could cause an explosion.

wristwatch, rings, and any other jewelry before handlmg
the battery.

• Always tum the battery charger off before .disconnecting

the battery connections. Remove the
and reconnect it last when servicing the battery.

BATTERY

A

WARNING:

severe

• When servicing the battery or checking the electrolyte

level, wear rubber gloves, a rubber apron, and eye
protection. Batteries contain
destructive.

it off at once with water. Acid may splash on the skin

into the eyes inadvertently when removing electrolyte
caps.

STARTING

Accidental

OFF

the

DC

breaker on the control panel

EXPLOSION

Battery

Lea~

acid batteries

+) connection terminal

of

explosive gases. To avoid sparks, do not

ACID

Sulfuric

injury

or

death!

If

it comes in contact wtth your skin, wash

starting

OFF

explosion

acid

can

be

of

batt~ry

in

batteries

sulfuri~

can

cause

injury

or

turn the

before servicing the

of

the engine before

_

cause

injury

~mi!

hydrogen,

1gmted by

o~

all

the starter

gases

o~

negative lead first

can

acid

whic~

~

elec~cal

ele~tncal

solenoi~.

fuel vapors.

Remo~e

cause

is ·

or

TOXIC

• Ensure that the exhaust system is adequate to expel gases

11

• Do not run the generator set

• For additional information, refer to ABYC TH-22

·A

• Do not use copper tubing in diesel exhaust systems.

• Do not install exhaust outlet where exhaust can be drawn

• Although diesel engine exhaust gases are not as toxic as

AVOID

• Do not service the engine while it is running.

EXHAUST

A

WARNING:

discharged from the engine. Check the exhaust system
regularly for leaks and make sure the exhaust manifold/

water-injected elbow is securely attached.

Be

sure the unit and its surroundings are well ventilated.

Run blowers when running the generator set

equipped with a functioning marine carbon monoxide

detector that complies with ABYC A-24. Consult your
boat builder
detectors.

(educational information on Carbon Monoxide).

WARNING:

odorless
nausea

gas.

or

death!

Diesel fumes can rapidly destroy copper tubing in exhaust
systems. Exhaust sulfur causes rapid deterioration
copper tubing resulting in exhaust/water leakage.

through portholes, vents, or

exhaust discharge outlet is near the waterline, water could

enter the exhaust discharge outlet and close or restrict the

of

flow

exhaust fumes from gasoline engines, carbon monoxide
gas is present
symptoms
poisoning are:

exhaust. Avoid overloading the craft.

Vomiting·
Dizziness
Headache
Nausea Weakness and sleepiness

MOVING

A

WARNING:

or

death!

situation arises in which it is absolutely necessary to
make operating adjustments, use extreme care to avoid
touching moving parts and hot exhaust system
components.

GASES

Carbon

or

dealer for installation

Carbon

Inhalation

in diesel exhaust fumes. Some

or

signs

monoxide

monoxide
produces

of

carbon monoxide inhalation or

Inability to

Throbbing in temples

Muscular twitching

(CO)

or

engine unless the boat is

(CO)

flu·like

air conditioners.

think coherently

PARTS

Rotating

parts

can

cause

is a deadly

or

engine.

of

approved

is

an

invisible

symptoms,

If

the engine

of

the

injury

If

gas!

of

a

,...,

...

Unlvanal

5 2

M·1;J@:WP•

i i

1

59:t;•

•

Do

not

wear

loose

equipment;

rings,
moving

.

•

Make
Kf!ep
places

•

Do

not

.

the

engine

•

Stay

when
be

caught

HAZARDOUS

A

WARNING:

avoid

necklaces

parts.

sure

all

protective

at

all

times.

check

is

clear

of

the

engine

in

tliese

NOISE

or bracelets that could

attaching

shields

fluid

operating.
the

drive
is

High

loss/

•

Never

operate

•

Do

not

removed.

A

WARNING:

mentally

OPERATORS

Many

of

the

in

your

Operators

notes

to

highlight
carefully,
procedures.

maintain

an

run

an

engine

Do

or

physically

MANUAL

preceding

Manual
critical

your

SAFETY

clothing or jewelry when servicing

wearing

rotating

engine without

not

loose

jackets, shirts,

hardware
and

guards

levels

or

the

drive

shaft

and

the

running;

noise

hair and clothing can easily

parts.

levels

its

with

the air intake (silencer)

work

on

machinery

incapacitated

safety

tips

and

along

with other cautions

information. Read

equipment,

and

sleeves,

be

caught in

is

properly tightened.

in

their

respective

belt's tension

transmission

can

cause

hearing

muffler installed.

when

by

fatigue!

warnings

follow

are

your

all safety

repeated

manual

t:oupling

you

and

INSTRUCTI·ONS

while

are

ABYC,

.

INSTALLING

Read
for safety codes

tions

ABYC

"Safety Standartls for Small Craft" ·

Order

ABYC

613

Annapolis,

- (

41

·

www.abycinc.~rg

NFPA

"Fire Protection Standard for Motor Craft"
Order
NFPA

1 Batterymarch Park

P.O.

Quincy,

USCG
"CPR
Code

Order

U.S.
Washington,

NFPA

AND

MARINE

the

following

when

installing your UNIVERSAL engine

(American Boat and

From:

Third Dtreet, Suite

MD

0)

990-4460

(National

From:

Box

9101

MA

02269-9101

(United States Coast Guard)

33

AND

CFR46"

of

Federal Regulations

From:

Government Printing Office

D.C.

USCG

PUBLICATIONS

ENGINES

ABYC,

and

21403

Frre

20404

NFPA

standards. Follow their

Yacht

10

Protection Association)

FOR

AND

GENERATORS

and

USCG

publications

recommenda-

Council)

ENGINE

Preparations
ough

(ABYC)

sources

Sections

All
Regulations

AND

examination

standards.

including

of

the

H-32

Ventilation

H-33

Diesel

P-1

Installatiion

and

P-4

Marine

E-11

AC & DC

TA

Batteries

installations

GENERATOR

to

install

an

engine should begin

of

the

American

These

standards are a combination of

the

USCG

and

ABYC

Auxilliary

(FCR).

standards
for

boats using diesel

Fuel

Systems

of Exhaust Systems for Propulsion

Engines

Inboard

must

Engines

Electrical Systems

and

Battery

comply

INSTALLATIONS

with

a thor-

Boat and

the

of particular interest

and Transmissions

Chargers

with

the

NFPA.

on

Federal

Yacht

fuel

Boats

Code

Council's

are:

of

When

installing WESTERBEKE engines

to

the

attention be paid

following

.INSTALLATION

and

generators it

information:

is

important that strict

CODES

Strict
when

AND

REGULATIONS

federal

regulations,

installing engines

SIPHON-BREAK

For installations

or

will

be

break

in

the

minimum

the

exhaust

raw

water

If

you

have

to

the

vessel's waterline under

siphon-break.

NOTE:

A siplton-break
operation.
engine

damage.

EXHAUST

The

exhaus·t

Exhaust Hose

and

turns

and

turns

system

MUST

under

any

where

below

the vessel's waterline, provisions must be made

raw

water supply hose

of20"

above

manifold

damage

Failure

to

any

doubt about the positi9n of the water-injected exhaust elbow relative

to

Consult

SYSTEM

system's hose

is

recommended:.

withoutthe

.In

this

regard,

be designed to prevent

sea conditions

.

ABYC

and

the exhaust manifold/water injected exhaust elbow is close

the vessel's waterline.

injection

the

requires

properly maintain a siphon-break

ne~d

guidelines,

generators in a marine environment.

to

port

engine

and

the

vessel's various operating conditions,

periodic inspection and cleaning

the

siphon-break manufacturer for proper maintenance.

MIJST:o~·celtified

The use of

of additiinal

a single

and

at

length

any

and

safety codes must be complied

the exhaust

is

at

or

possible

fitting

of corrugated exhaust hose

the

angle

Failure

below

flooding

for

this

type

and

entry of

of

vessels

elbow.

This hose must be looped a

to

use a siphon-break'when

the

load

of

can·

marine use.

of hose

clamps

wat~r

into the exhaust system

heal.

to

install a siphon-

waterline

the

boat.

result

Con11gated

a,llows

to

accomplish these bends

will

to

ensure proper

in

catastrophic

for

extreme

can

be

result

install

Marine

used.

with

to

in

a

bends

The

AVAILABLE
YOUR.

DEALER

SIPHON-BREAK
LOOP
PART

FROM

WESTERBEKE

FOR
NO.

WITH

1"

HOSE

044010

STAINLESS

.

A

detailed
engines
.is

Website:

and

also

available

www.westerbeke.com

Marine

Installation

generators

in

pdf

is

supplied

format

Manual

on

with

our

website

covering

every

unit

to

g;~soline

sold.

and
This

download

~Univcarsal

2&

M·l;l1~1JA•£t'13;W

.

IV

diesel

manual

TABLE

Parts

Identification

lntroduction

Warranty Procedures ........................................ .3

Serial Number Location ..................................

Admiral
Captain
Diesel
Preparations

.............................................................

Control
Control

Fuel,

Engine

for
Starting/Stopping
Break-In
The

Alarms and Circuit Breakers ..........................

Maintenance
Engine

Raw Water Pump ............................................

Changing the Raw Water Impeller .................

Raw Water Intake Strainer .............................. 16

Thermostat ...................................................... 16

Heat Exchanger .............................................. 16

Engine
Remote
Fuel

Air Cleaner/Silencer ....................................... 19

Priming the Fuel
Fuel Lift

Fuel Filters ......................................................

DC

Drive Belt Adjustment ....................................

Battery Care ....................................................

Glow Plugs .....................................................

Alternator Troubleshooting ............................

Wiring
Wiring
Wiring

Procedure

Daily

Routine

Cooling

Oil

Change

Oil

Filter

System

.......................................................

Pump ................................................ 19

Electrical

Diagram
Schematic
Diagram

Schedule

System

................................................ 2 Wiring

Panel

Panel

............

..................

Oil

and

Initial

Start-Up

Procedure

.............................

.......................

Engine

Coolant..

......................

...............................

...........................................

..............................................

.....................................

Circuit

......................................

.............................................

...............................................

Pump ................................... 19

........................................

................................................

..............................................

(Catalina)

..................................

OF

.4

.....

...

10

11

11
12
14

15
15

17

18

19

20

.

21
21
21
21

22

..

23

24
25

CONTENTS

Schematic

3

5

6

?

8

9

Engine

Engine
Control

Adjustments

Throttle and

Valve Clearance ............................................. 27

Testing Oil Pressure ........................................ 28

Fuel Injectors .................................................. 28

Troubleshooting

Panel

Troubleshooting Water Temperature .............

Troubleshooting Oil Pressure Gauges ............

Tachometer
Water

PRM

Heater

Transmission

Changing the Fluid ........................................ .34

Gear Shifting .................................................. 34

Daily

Control Cables ................................................ 35

Maintenance .................................................... 35

Operation .............................................. 35

Transmission
HBW

Transmission

Shaft Couplings .............................................. 37

Shift Lever ...................................................... 37

Fluid Change .................................................. 38

Specifications .................................................. 38

Operating Temperature ................................... 39

Transmission Cooler ....................................... 39

Maintenance .................................................... 39

Transmission

Control Cables ...............................................

Lay-up

and
Specifications
Spare

Parts
Standard
Metric

Conversions

(Catalina)

..............................

.............................................

Stop Assembly ........................... 27

(Chart)

Troubleshooting

Troubleshooting

........................

(Chart)

............

............................

.....................................................

............................................

Troubleshooting

........................

Troubleshooting

Recommissioning

(Chart)

..............

.....................

(Chart)

.............

..........................

...................................................

........................................................

Hardware

Torques

Chart

..............................

................................

26

27

29

.31
.31

31

32
33

.

34

36

37

.40
.40

.42

44

45

46

.4

7

PARTS

IDENTIFICATION

HEAT

EXCHANGER----'->~

TRANSMISSION
CONTROL
BRACKET

REAR

TRANSMISSION
FLUID

DRAIN

OIL

MANIFOLD
!COOLANT

ZINC

FILL

PRESSURE

FILL]

RIGHT

CAP

SIDE

COOLANT

PUMP

OIL

FILL

SHEAVE

WATER
TEMPERATURE
SEND

OR

INJECTION

PUMP

M·40BILLUSTRATED

'AIR

FILTER

SILENCER

MANIFOLD
PRESSURE

ALTERNATOR

CAP

MANIFOLD

PREHEAT
SOLENOID

~~~~~~~~~~£;::.~~~b.::-:__COOLANT

FUEL

REAR

FILTER

M-50BILLUSTRATED

ALTERNATOR

OIL

FILTER

DRAIN

RAW
PUMP

WATER

FLEXIBLE
MOUNT

MANIFOLD

!COOLANT

COOLANT
DRAIN

PRESSURE

FILL]

OIL

CAP

PAN

I.D.

NAME

PLATE

START
MOTOR

FRONT

,.,

Unlvarsal

4

5 6

COOLANT
DRAIN

FLEXIBLE

MOUNT

M·1;1@!M•'W3;W

2

LEFT

SIDE

OIL

DRAIN

HOSE

INTRODUCTION

These new high performance UNIVERSAL marine diesel
engines are a product
design technology and their combined years
manufacturing quality marine engines. We take great pride in

the superior durability and dependable performance
marine engines. Thank you for selecting UNIVERSAL.

In order to get the full use and benefit from your engine, it is
important that you operate and maintain it correctly. This
manual is designed to help you do this.
manual carefully and observe all the safety precautions
throughout.
WESTERBEKE distributors, dealers and service centers are
available worldwide.
contact your nearest dealer for assistance.

This is

provided

Universal

are planning
Installation

An

your

Operators Manual. A Parts List is also

and

Dealer

to

Manual

WARRANTY

Your UNIVERSAL Warranty is included in a separate folder.

If

you have not received a customer identification card regis­tering your warranty
registration form, please contact the factory in writing with
model information, including the unit's serial number and
commission date.

of

UNIVERSALIWESTERBEKE'S

of

experience

Please read this

extensive network

Should your engine require servicing,

a Service Manual is available from

or

in

pdf

install this equipment, reference the

supplied with the unit.

form

of

UNIVERSAL

off

our

website.

PROCEDURES

60

days after submitting the warranty

your

If

of

you

our

ts

PRODUCT

Product software (tech data, parts lists, manuals, brochures and
catalogs) provided from sources other than UNIVERSAL are not
within UNIVERSAL'S CONTROL.

UNIVERSAL
CONTENT
RANTIES
THERETO, INCLUDING ACCURACY, TIMELINESS
COMPLETENESS THEREOF

BE

LIABLE
INCURRED IN
OF

THE
UNIVERSAL customers should also keep in mind the time

span between printings
and the unavoidable existence
manuals. In summation, product software provided with
UNIVERSAL products, whether from UNIVERSAL or other
suppliers, must not and cannot
the definitive authority on the respective product.
makes good sense but is imperative that appropriate repre­sentatives
consulted to determine the accuracy and currentness
product software being consulted by the customer.

NOTES,

As this manual takes you through the operating procedures,
maintenance schedules, and troubleshooting

engine, critical information will be highlighted by
CAUTIONS, and WARNINGS. An explanation follows:

SOFTWARE

CANNOT

OF

SUCH SOFTWARE, MAKES NO WAR-

OR

REPRESENTATIONS

FOR

CONNECTION WITH

FURNISHING

of

UNIVERSAL or the supplier in question be

CAUTIONS

BE

RESPONSIBLE

WITH

AND

WILL

ANY

TYPE

OF

DAMAGE

OR

OR

USE

OF

SPCH

of

UNIVERSAL product software

of

earlier UNIVERSAL

be

relied upon exclusively

AND

WARNINGS

FOR

RESPECT

IN

OR

ARISING

SOFTWARE.

of

THE

OR

NO EVENT

INJURY

OUT

as

It

not only

of

the

your marine

NOTES,

Unlvarsal

Customer Identification

UNIVERSAL OWNER
MAIN
HOMETOWN, USA

Model M-358

Expires. 7/20/2000

TYPICAL

Your UNIVERSAL Warranty Statement is included in the
product documentation package. There is a Warranty
Registration Card you can fill out and mail to Westerbeke
Corporation
register your products warranty
a Customer Identification card in the mail within
registering.
your model number, serial number and in service date
available.

STREET

Ser. #6C442E711

CUSTOMER

or

go to our website: www.westerbeke.com and

If

you do not, please contact the factory and have

IDENTIFICATION

on

line. You should receive

CARD

60

days

of

NOTE:

An

A

CAUTION:

observed,

your

engine.

A

WARNING:

followed,

operating procedure essential to note.

can

can

Procedures,

result

in

Procedures,

result

in

which

the

damage

which

personal

if

or

if

injury

not

strictly

destruction

not

properly

or

loss

of

of

life.

Nnlvarsal

*

Ml;!IIIJ#•I119;W

3

INTRODUCTION

SERIAL

An identification nameplate that displays the engine model
number and engine serial number
the engine's manifold. Take the time to enter this information
on
reference when seeking technical information and/or ordering
parts.

Fili

UNDERSTANDING

The diesel engine closely resembles the gasoline engine,
since the mechanism is essentially the same. The cylinders
are arranged
the same general type
diesel engine has the same types of valves, camshaft, pistons,
connecting rods and lubricating system.

To
tive
proper ventilation and proper maintenance
cating and cooling systems. Replacement
cating filter elements at the time periods specified and
frequent checking for contamination (water, sediment, etc.) in
the fuel
use
designed specifically for diesel engines.

The diesel engine does differ from the gasoline engine, how­ever,
retor and ignition systems are done
place
performs the function of both.

NUMBER

the blank decal provided

in

the.

information for your

a great extent, a diesel engine requires the same preven-

maintenance

~ystem

of

a brand of high detergent diesel lubrication oil

in its method of handling and firing of fuel. The carbu-

is

a single component (the fuel injection pump) which

LOCATION

is

mounted on the side

below.

This will provide a quick

SEA. NO.

rejer(mce.

THE

DIESEL

above

a closed crankcase; the crankshaft is

as

that

of

a gasoline engine, and the

as

a gasoline engine. Most important are

are essential. Also important is the consistent

·

/lJJ

ENGINE

of

the fuel, lubri-

of

fuel and lubri-

away

with and in their

of

of

ORDERING

Whenever replacement parts are needed, always provide the
engine model number and engine serial number
appear on the silver and black identification nameplate
located on the manifold.
mation
complete part description and part number for each part
needed (see the separately furnished
insist upon UNIVERSAIJWES1ERBEKE packaged parts
because will fit or generic parts are frequently not made
the same specifications

SPARES

. Certain spares will be needed

your UNIVERSAL marine engine.
WES1ERBEKE dealer will assist
board inventory

PARTS page in this manual for a suggested list.

PROTECTING

Care

have resulted in a UNIVERSAL diesel engine capable
many thousands
manufacturer cannot control how or where the engine is
installed in the vessel or the manner in which the unit
operated and serviced in the field. This is up to the
buyer/owner -operator.

NOTE:

PARTS

as

they

You

must provide

so

we can identify your engine.

as

original equipment.

AND

ACCESSORIES.

to

support and maintain

Your

you

of

spare parts. See the UNIVERSAL SPARE

YOUR

INVESTMENT

at the factory during assembly and thorough testing

of

hours

of

dependable service. However the

Six important steps to ensure long engine life:

us

with this infor-

In

addition, include a

Parts Catalog). Also

UNIVERSAl)

in preparing an on

is

of

to

0 Proper engine installation and alignment.
0 An efficient well-designed exhaust system that includes

to

an anti-siphon break
engine.

prevent water from entering the

0 Changing the engine oil and oil filters every 100 operating

hours.

0 Proper maintenance

to the maintenance schedule in this manual.

of

all engine components according

0 Use clean, filtered diesel fuel.

0 Winterize your engine according

RECOMMISSIONING section in this manual.

to

the LAY-UP AND

ADMIRAL

CONTROL

PANEL

DESCRIPTION

This

manually-operated

KEY

switch

and

meter

which

measures

in

1110

hours.

The
ATURE
Fahrenheit,
engine's

control

tem's

switch
is
pushbuttons,

RPM
TERS
PER
ENGINE

RECALIBRATED
ACCURACY
REAR

gauge

an

oil

pressure

circuit

voltage.

is

turned

in

operation.

gne

GAUGE:

REGIS-

REVOLUTIONS

MINUTE

OF

THE

AND

CAN

BE

FOR

FROM

OFTHE

THE

PANEL.

OIL

VOLTAGE

All

The

control panel

RPM

gauge with an ELAPSED TIME

the engine's running time

panel

also includes a

which

indicates water temperature

PRESSURE gauge

in

pounds per square inch,

gauge which measures the

gauges

are

illuminated

on

and

remain illuminated while the engine

.panel

also contains

for

PREHEAT

and

WATER

TEMPERATURE

GRADUATED

ILLUMINATED

TURNED

ON.

TEMPERATURE

is

equipped

WATER

which

when

two

one

for

IN

DEGREES

WHILE

THE

THE

ENGINE'S

IS

170"

with

a

in

hours

TEMPER-

in

degrees

measures the

and

a DC

sys-

the

key

rubber-booted

START.

GAUGE:

THIS

FAHRENHEIT

KEY

-190" F (77"-

GAUGE

SWITCH

NORMAL

AND

IS

OPERATING

88"C).

and

IS

IS

When

the

engine

is

shut

down

with

the

water temperature gauge will continue
temperature reading indicated
power

was

turned

off

The oil pressure

when

the

key

switch is turned

will

once

again

register the engine's true temperature

electrical
A

Admiral

necti~g

..

electncal
the
be
running.
on
engine's

separate

Panel

the

buzzer

audible

The

and

should

oil

po"";"er

is

alarm

buzzer

The

buzzer to

harness.

The installer

in a location

to

the

operator

buzzer

silence

pressure

restored

installer

the

will

when

rises

OIL
ATED
ILLUMINATED
ON.
PRESSURE
(2.1-4.2

by

off

to

the

with

harness

is

responsible

four-pin

is

where

it

should

sound

when

the

engine

above

PRESSURE

IN

POUNDS

THE

ENGINE'S

RANGES

kg/cm

the

key

to

the

gauge

gauge

The temperature

gauge.

is

supplied

for

connection

also

responsible

will

be

dry

and

it

sound

while

the

ignition

has

started

15

psi

(1.1

kg/cm

GAUGE:

THIS

PER

SQUARE

WHILE

THE

KEY

NORMAL

OPERATING

BETWEEN

2

).

switch

turned

register

before

electrical

will

fall

with

electrically

on

the

engine's

for

where

the

engine

key

and

2

).

GAUGE

IS

INCH

(PSI)

SWITCH
30-

60

psi

off,

the

last

to

zero

gauge

when

every

con-

installing

it

will

is

is

turned

the

GRADU-

AND

IS

IS

TURNED

OIL

·

HOURMETER:
REGISTERS
TIME,

USED
THE
SCHEDULE.

PREHEAT
THE
POWER
THE
THIS
DC
BUTTON.

START
STARTER'S
THIS
UNLESS
AT

ELAPSED

AND

SHOULD

AS A GUIDE

MAINTENANCE

BUTTON:

CONTACTS

TO

THE

PREHEAT

IS

TRANSMITTED

POWER

IS

BUTTON:

SOLENOID

BUTTON

WILL

THE

SAME

PREHEAT

TIME.

THE

BE

FOR

IN

THE

PREHEAT

GLOW

PLUGS.

SOLENOID
ALSO

ALSO

TO

TRANSMITTED

WHEN

PRESSED,

WHICH

NOT

OPERATE

BUTTON

DEPRESSED,

THE

IT

SOLENOID

THE

"I"

TERMINAL

RECEIVES

ELECTRIC

TO

THE

ENERGIZES

CRANKS

THE

ELECTRICALLY

IS

PRESSED

CLOSES

SENDING

POWER

FUEL

PUMP.

START

THE

ENGINE.

AND

·

ON
AND

HELD

SWITCH:

THE
SWITCH
ON

SUPPLIES

TO

THE

INSTRUMENT

PANEL

CLUSTER,

SWITCH,

TERMINAL

CHARGING

AND

TO

THE

BUZZER

A

PULSING

I

•

AUTOMATIC

·.

·--~····'

.

,'/.

"/~

'

COOLANT

SUPPLIED
REACHES
ALARM

OIL
LOCATED
THE
FALL
ING
SIGNAL.

ALARM

TEMPERATURE

WITH

210" F (99"C),

WHICH

WILL

PRESSURE

ENGINE'S

TO

THE

ALARM:

OFF

THE

OIL

10-5

psi

ALARM.

SYSTEM

ALARM:

THE

INSTRUMENT

THIS

EMIT

A

AN
ENGINE'S
PRESSURE.

(0.7-

0.4

IN

THIS

EVENT,

AN

ALARM

PANEL.

SWITCH

WILL

CONTINUOUS

OIL

PRESSURE

OIL

GALLERY.

SHOULD

THE

THE
THE
ALARM

kg/em'),

BUZZER

IF

THE

CLOSE

SIGNAL.

ALARM

THIS

SWITCH

ENGINE'S

SWITCH

WILL

DC

VOLTMETER:

INDICATES

.BAmFW

SHOULD

HAS

ENGINE'S

SOUNDING

SWITCH

MONITORS

OIL

PRESSURE

WLL(OPEIN:

EMIT

A

PIJl.SATJNG

KEY

WHEN

TURNED

DC

POWER
PREHEAT

EXCITATION

OF

THE

DC

ALTERNATOR

ALARM

ENERGIZING

MODE.

THE

IS

SHOW

BEEN

COOLANT

IS

AMOUNT

BEING

CHARGED.

13VTO

THE

'SOUND-

IT

IN

THE

14V.

5

CAPTAIN

CONTROL

PANEL

DESCRIPTION

This manually-operated control panel is equipped with a

KEY

switch,

tons,

an
lamps,
OIL

PRESSURE,

TEMPERATURE.

RPM

GAUGE:

PER

MINUTE
RECALIBRATED
THE

REAR

an

RPM

gauge,

PREHEAT and

INSTRUMENT TEST button and

one

for AL1ERNATOR DISCHARGE, one for low

and

one for high ENGINE COOLANT

REGISTERS

OFTHE

FOR

OF

THE

REVOLUTIONS

ENGINE

AND

ACCURACY

PANEL.

CAN

FROM

BE

START

three

indicator

but-

The panel also
PRESSURE or high
RPM

gauge is illuminated

includes

COOLANT

and remains illmninated

ALARM:

THE

ALARM

WILL

BELOW

10-5 psi

PULSATING

TEMPERATURE
210"F

NOTE:

SOUNDING

PRESSURE

SIGNAL

(99"C).
THE

ALARM

IS
REACHES

IN

IN

THIS

NORMAL

SOUND

(0.7

-

0.4

THE

ALARM

THE

FRESHWATER.

EVENT,

WILL

SOUND

ONCE

15

psi

an

alarm

when

while

IF

kg/em").

WILL

THE

ALARM

WHEN

THE

ENGINE

(1.1

kg/em"),

buzzer for low
TEMPERATURE.

the

KEY

switch is

the engine is

THE

ENGINE'S

IN

THIS

ALSO

COOLING

THE

THE

OIL

EVENT,

THE

SOUND

IF

CIRCUIT

WILL

EMIT A CONTINUOUS

KEY

SWITCH

STARTS

AND

ALARM

WILL

TEST

PRESSED,

ALTERNATOR,

PRESSURE,
COOLANT

TURE

CUITS.
THE
OIL
THE
TURE
LIGHTS
ADDITION

ING

BUZZER..

on.

The

turned

in

operation.

PRESSURE

ALARM

THE

RISES

THE

PRESSURE,

THE

FALLS

WILL

COOLANT

TO

IS

SILENCE.

BunDN:

CONTROL
ALTERNATOR,
WATER

INDICATOR

SIGNAL.

TURNED

ON.

ENGINE'S

WHEN

TESTS

THE

AND

THE

TEMPERA-

CIR-

WHEN

PRESSED,

AND

TEMPERA-

ILLUMINATE

TO

SOUND-

ALARM

EMIT

THIS

OIL

THE

OIL

THE

IN

on

A

START

BUTTON:
STARTER'S
BUTTON
PREHEAT
TIME.

SOLENOID

WILL

BUTTON

WHEN

NOT

OPERATE

IS

PRESSED,

WHICH

CRANKS

ELECTRICALLY

PRESSED

AND

ENERGIZES

THE

HELD

THE

ENGINE.

UNLESS

AT

THE

4 4

£ 6 mN;!I§Ij#•M!;M

THIS

THE

SAME

Unlvarsal

~-----~~swrr~:THEKEY

BUTTON:

THE

CONTACTS
POWER
PREHEAT
TRANSMITTED
IS

ALSO

IN

TO

THE

GLOW

SOLENOID

TO

TRANSMITTED

WHEN

THE

PREHEAT

PLUGS.

ALSO

THE

ELECTRIC

TO

SWITCH

WHEN
SUPPLIES
INSTRUMENT
CWSTER,
EXCITATION

DC

AND

ENERGIZING
MODE.

DEPRESSED,

THE

RECEIVES

THE

DC
PREHEAT

CHARGING

TO

THE

IT

SOLENOID

"I"

TERMINAL

POWER

FUEL

PUMP.

START

BUTTON.

TURNED

POWER

TO

PANEL

SWITCH,

TERMINAL

ALTERNATOR

ALARM

BUZZER

IT

IN A PULSING

CLOSES

SENDING

ON

THE

AND

THIS

DC

POWER

ON

OF

IS

THE

THE

6

DIESEL

FUEL,

ENGINE

OIL

AND

ENGINE

COOLANT

DIESEL

Use a diesel fuel that meets the requirements ofNo.2-D SAE

J 313 and has a Cetane rating

diesel fuel according to ASTM D975.

Care

Use only clean diesel fuel! The clearance
in your fuel injection pump is very critical; invisible dirt
particles which might pass through the filter can damage
these finely finished parts. It

fuel, and keep it clean. The best fuel can be rendered

unsatisfactory by careless handling
facilities.
engine's daily use is clean and pure, the following practice
advisable:

Purchase a well-known brand
Install and regularly service a good, visual-type filter/water

separator between the fuel tank and the engine. Raycor 230

or 245 are good examples
of

ENGINE

Use a heavy duty engine oil with an API classification
CG-4, CH-4
the initial
and filter change intervals as specified in the

MAINTENANCE SCHEDULE in this manual.

Westerbeke Corporation does not approve or disapprove

the use
break-in must be performed using conventional oil.
change intervals must be as listed in the MAINTENANCE

SCHEDULE

synthetic oils are used.

NOTE:

regarding synthetic oil.

FUEL

of

#45 or higher. Grade

Of

The

Fuel

Supply

of

the components

is

important to buy clean f

or

improper storage

To

assure that the fuel going into the tank for your

of

fuel.

of

such a filter. Micron filter rating

#10

is

recommended.

OIL

or

CI-4. Change the engine oil and filter after

50 hours

of

synthetic oils.

The infomwtion above supersedes all statements

of

break-in operation. Then follow the oil

If

synthetic oils are used, engine

section in this manual and not be extended

Oil

of

of

is

CF,

if

ENGINE

UNIVERSAL recommends a mixture
50% distilled water. Distilled water is free from the
chemicals that can corrode internal engine surfaces.

The antifreeze performs double duty.

run at proper temperatures by transferring heat away from

the engine to the coolant, and lubricates and protects the

cooling circuit from rust and corrosion. Look for a good

quality antifreeze that contains Supplemental Cooling

Additives (SCAs) that keep the antifreeze chemically

balanced, crucial to long term protection.

The distilled water and antifreeze should be premixed before

being poured into the cooling circuit.

NOTE:

antifreeze that

Antifreeze mixtures will protect against an unexpected freeze

and they are beneficial to the engine's cooling system. They

retard rust and add to the life

Antifreeze

Freezing

COOLANT

A coolant recovery tank kit is supplied with each
UNIVERSAL diesel engine. The purpose
tank
during engine operation, without the loss
without introducing air into the cooling system.

COOLANT

of

50% antifreeze and

It

allows the engine to

Look

for

the new environmentallyjriendly long lasting

is now available.

of

the circulating pump seal.

ANTIFREEZE

concentration

Temperature

RECOVERY

is

to allow for engine coolant expansion and contraction

PROTECTION

23%

14oF

(-5°C)

TANK

30%

35%

of

this recovery

of

coolant and

50%

For recommended oil viscosity, see the following chart:

Operating

Above

41

°-68°F

Below

Temperature

68°F

(20°C)

(5-20°C)

41°F

(5°C)

Oil

SAE lOW-40
SAE lOW-40

SAE lOW-40

Viscosity

or

15W-40

or

15W-40

or

15W-40

COOLANT

~

,.,Unlvarsal

£ 6

&f.1;11S!JQ•i'tj3;M

7

RECOVERY

TANK

PREPARATIONS

FOR

INITIAL

START-UP

PRESTART

Before starting your engine for
longed

D Check the engine oil level; add oil

the high mark on the dipstick.

INSPECTION

layoff-

check the following items.

the

first time or after a pro-

to

D Check the fuel supply and examine the

bowls

for

contaminants.

D Check the transmission fluid

NOTE:

Refer to the specifications pages in this manual

fuel,

oi~

and

transmission types

level.

and

quantities.

maintain the level at

fuel

filter/separator

for

D Check the DC electrical system. Inspect

and

battery cable connections.

wire

connections

D Visually examine the unit. Look for loose or missing

parts, disconnected wires, unattached hoses, and check
threaded connections.

D Check the coolant level in the plastic recovery

the manifold.

NOTE:

If

the engine has

to the

ENGINE COOLING CIRCUIT section

not

yet

been filled with coolant, refer

tank

of

this manual.

and at

COOLANT
RECOVERY

TANK

MANIFOLD

MANIFOLD
(M-358

SHOWN)

~

8

STARTING/STOPPING

PROCEDURE

STARTING

Place the transmission
control to slightly open.

A

neutral.
to

your

Thrn the

PREHEAT:

panel lights, gauges and meters, and fuel solenoid will

activated.
accordance with the following chart:

PROCEDURE

in

neutral and advance the throttle

CAUTION:

Starting

transmission,

KEY

Depress the PREHEAT switch. The voltmeter,

The

Make

certain

in

gear

your

SWITCH

PREHEAT switch should

could

boat,

to the

the

transmission

result

and

ON

position (2 o'clock)

in

serious

vessels

be

depressed in

is
damage

nearby.

Temperature/Preheat

Atmospheric

¥WF(+5°C)

+41°F(+5°C)

+23°F(-5°C)

Limit

START:

While still depressing the PREHEAT switch, depress
the START switch. This will engage the start solenoid.
engine starting, release the START switch.
PREHEAT switch until the oil pressure reaches

Temperature

or

to

23°F

of

continuous

hig~er

(-5°C)

or

lower

use

Approx.
Approx.
Approx.

30

seconds

Preheating

1 0

seconds

15

seconds

20

seconds

before

Do

not release the

15

Time

cranking

psi.

in

be

Upon

AcAUTION:

engine

starting

filling

with

pump

is
cooling
enter

manifold

from
hull
correcting
Engine

warrantable

in

Once the engine starts, check instruments for proper oil
pressure and battery charging voltage.

NOTE:

running.

NOTE:

Depressing
will help stabilize the engine RPM until
temperature reaches 150°- 170°F (60°­propeller load
running
load

system

the

happening

shut-off,

damage

mind.

Never attempt

Some unstable running may occur

and

on

the

Prolonged
can

raw

water.

pumping

raw

during

engine's

once

cylinders

the

exhaust

by

draining

the

cause

resulting

issue;

the

Preheat switch for 10-15 second

is

applied

the PREHEAT switch

DC alternator will

cranking

result

in

the

This

may

water

through

cranking.

by

way

sPfem

closing

the

the

raw

the

exhaust

·of

the

excessive

from

raw

owner/operator

to

engage

to

the

the

engine.

be

happen

intervals

engine

the

This

of

fills.

water

muffler,

water

starter

When

is

depressed, a charging

discernible.

exhaust

because

raw

raw

water

the

exhaust

Prevent

supply

and

engine

entry

should

while

in a cold

the

operating

77°C)

the

without

system

the

water

can

this

through·

cranlcing.

is

not

keep

the

engine.

intervals

and

engine

engine

a

the

a

this

is

is

VOLTAGE

DROP

NOTE:

When

starting:

A voltage

when
is

depressed.

Should the engine not start when the START switch is
depressed for
wait
longer.

drop

will

occur'

the

preheat switch

10 to

20

seconds, release both switches and

30 seconds; repeat the procedure above and

Never

run

the

starter

for

more

than

30

seconds.

prehe~t

STARTING

Make certain the lubricating oil conforms with the ratings for
the prevailing temperature. Check the table on the engine oil

~ction

The battery should
drep.

a sufficient amount

Use

Temperature/Preheat chart elsewhere in this section.

STOPPING

To stop the engine, bring the throttle to an idle position and
place the transmission in neutral. Allow the engine to idle for

a

few moments

to shut down the engine.

l~ver

Made certain the

12

o'clock).

(
discharge.

operator
of

preventing the battery from
from the
should be stowed

UNDER

of

this manual.

COLD

CONDITIONS

be

fully charged to minimize voltage

of

preheat to aid in starting, see

PROCEDURE

to

stabilize temperatures. Pull the STOP lever

Onee the engine stops, return the

to the run position. Then turn OFF panel key switch.

key

switch

is

in

the

OFF

position

1f

the

Key

_Switch}!tkft-QN,

An engine alarm buzzer

of

this condition

Key

Switch after stopping

in

(Key

a safe place).

Switch

discharge

the

battery

wfll

iso.providedro·wam

ON).

The

best

method

is

to

remOve

the

the

engine.

(The

extra

the

key

key

9

BREAK-IN

PROCEDURE

THE

FIRST

Although your engine has experienced a minimum
hour

of
proper operation
The service life
engine is operated and serviced during its initial
use.

Your new engine requires approximately 50 hours
conditioning operation to break in each moving part in order
to maximize the performance and service life
Perform this conditioning carefully, keeping in mind the
following:

1.

Start the engine according to the Starting Procedure

section in this manual; run the engine at fast idle while
checking that all systems (raw water pump, oil pressure,
battery charging) are functioning.

2.

Allow the engine to warm up (preferably by running at fast

idle) until the water temperature gauge moves into the

130° -140°F range.

3.

While using the vessel, run the engine at varying engine

rpms for the first 25 hours.

4. Avoid rapid acceleration, especially with a cold engine.

5. Use caution not to overload the engine. The presence

gray or black exhaust, and the inability
reach its full rated rpm, are signs

50

HOURS

test operations

of

all systems, break-in time is required.

of

your engine is dependent upon how the

to

ensure accurate assembly and

50

of

the engine.

of

the engine to

of

an overload.

of

hours

of

initial

one

of

of

a

Breaking-in a new engine basically involves seating the
piston rings to the cylinder walls. This cannot be accomplished
by long periods
rpm. Idle running may glaze the cylinder walls, resulting in

excessive oil consumption and smoky operation. Excessive

or

speed
may cause scoring

results. Operate the engine in moderation during the

break-in period. (Don't baby the engine, but do not abuse it.)

MODEL

M3-20B
M25XPB

M358
M408
M50B

NOTE:

Attempting

may

shown

NOTE:

The

the

allow
throttle underway
rated horsepower when

NOTE:

See

break-in information

of

running at idle, nor by early running at full

heavy over-loading, especially with a cold engine,

of

the cylinder walls, producing similar

50-hour

RECOMMENDED

IDLE
RPM

1000-1200
1000-1200

800-1000
800-1000
800-1000

to

reduce

produce unstable engine operation and

propeller should

engine

to

reach

in

forward gear

RPM

CRUISE

RPM

2500-3000
2000-2500
2000-2500
2000-2500
2000-2500

idle

speed below

be

either 2 or 3

its

maximum rated

to

RANGES

the

blade.

rpm

ensure

the

MAXIMUM

RPM

3500-

3600

2900-

3000

2900-3000
2900-3000
2700-2800

minimum

stalling.

It should

at full

open

availability

needed.

the

TRANSMISSION section ofthis manual for

on

your transmission.

of

6. During the next 25 hours, the engine may be operated at
varying engine rpms, with short runs at full rated rpm.
Avoid prolonged idling during this break-in period.

10

THE

DAILY

ROUTINE

CHECK

Each day before starting your engine, take a few moments to

run this check list:

LIST

D Visually inspect the engine for fuel, oil, coolant and

exhaust leaks.

D Check the oil level.

D Check the transmission fluid level.

D Check for loose wires at the alternator.

D Check for loose wires and electrical connections at the

DC

alternator and elsewhere on the engine's

DC

harness.

D Check the starting batteries level (weekly)

D Check drive belts for wear and proper tension (weekly).
D Log your engine running time. These hours relate to

scheduled_maintenance.

D Check fuel supply; always keep fuel tank(s)

possible.

as

full as

D Look for clean fuel in the fueVwater separator bowl.

. D Check the coolant level in the plastic recovery tank.

D Check for any obviously loose components

bolts.

NOTE:

Excessive

leak.

Check

tem

pressure tester

the

area

of

the

system as outlined

section

in

the

entire

leakage.

this

manual.

loss

of

coolant indicates a cooling system

system.

to

pressurize the cooling system

In

If

necessary,

cases

of

excessive coolant

in

the

ENGINE COOLING CIRCUIT

or

use

nuts or

a cooling

to

locate

loss,

refill

sys-

START

NOTE:

manual for

1.

2.

3.

4. While pressing PREHEAT, push the START.

5.

NOTE:

above

6.

YOUR

See

Put

transmission in neutral, throttle advanced.

Tum

Depress PREHEAT (10 to

As engine fires - release START and PREHEAT.

Observe the panel gauges, check the oil pressure, DC
charges, etc. Check for water discharge with the exhaust.

Should engine fail
procedure,

Allow a few minutes for the engine to warm at a
comfortable high idle
rpm to the normal idle position, shift into gear, and get
underway.

A

CAUTION:

always

transmission

slight

pause

Shifting

transmission/damper

ENGINE

STARTING STOPPING PROCEDURE

more

detailed·

KEY to the

and PREHEAT

reduce

the

firmly

in

neutral

at

high

rpm

instructions.

ON

position (2

to

start,

(1400- 1500 rpm), then reduce the

When

shifting

engine

from

one

will

will

damage

15

seconds).

wait 30

longer.

rpm

to

direction

allow

0'

clock)

seconds,

the

transmission,

idle,

then

to

another.

the

propeller

the

plate.

in

repeat

shift

to

this

the

the

A

slow.

ENGINE

The

mounted manual reset circuit breaker
Excessive current draw
the instrument panel wiring
breaker to trip. In this event most engines will shut down
because the open breaker disconnects the fuel supply.

this should occur, check and repair the source
After repairing the fault, reset the breaker and restart the
engine.

LOW

A low oil pressure alarm switch is located off the engine's
oil gallery. This switch's sensor monitors the
pressure. Should the engine's oil pressure fall to 5

(0.4 - 0.7 kg/cm

CIRCUIT

DC

harness on the engine is protected by an engine-

OIL

PRESSURE

OIL

[M-508

BREAKER

or

electrical overload anywhere in

or

engine wiring will cause the

ALARM

2

),

this switch will activate a pulsating alarm.

GALLERY

SHOWN]

SWITCH

ALARMS

(20 amps DC).

eugine's oil

OIL

PRESSURE

AND

If

of

the problem.

-1.Q

ALARM

+ '

psi

SWITCH.

Univarsal

4

a a

CIRCUIT

COOLANT

A coolant temperature switch is located on the thetmostat .
housing. This switch will activate a
coolant's operating temperature reaches approximately
210"F (99°C).

&f.1;'@1P·NI#i•

'11

BREAKER

TEMPERATURE

THERMOSTAT

SWITCH

[M·50B

continuous

ASSEMBLY

SHOWN]

alarm

if

the