Subaru Robin Power Products EY15V, EY20V User Manual
ROBIN
AMERICA, INC.
ROBIN
TO
WISCONSIN
ROBIN
ENGINE
MODEL
CROSS REFERENCE
LIST
ROBIN
EY08
EY15
EY 15V
EY20
EY2OV
EY23
EY28
EY3
5
EY40
-
EY45V
EY2
1
EY44
EY 18-3
EY25
EY27
EH11
EH12
EH15
EH17
EH21
EH25
EH30
EH30V
EH34
EH34V
EH43V
EC13V
DY23
DY27
DY30
DY3
5
DY4 1
WISCONSIN
ROBIN
SIDE
VALVE
W
1-080
W1-145
W1-145V
W1-185
W1-185V
W1-230
W 1-280
W
1-340
W 1-390
Wl-45OV
EY21W
EY44W
EY18-3W
EY25W
EY27W
OVERHEAD
VALVE
WO1-115
wo1-120
WO1-150
WO1-170
wo1-210
WOl-250
WO 1-300
WO1-300V
WO1-340
WO
1
-340V
WO 1-43 OV
TWO CYCLE
WT1-125V
DIESEL
WRD
1-230
WRD
1-270
-1-300
WRD1-350
WRD1-410
0
0
0
CONTENTS
Section
1
.
SPECIFICATIONS
2
.
PERFORMANCE
2-1
2-2
2-3
3
.
FEATURES
4
.
GENERAL DESCRIPTION
4-
1
4-2
4-3
4 -4
4-5
4-6
4-7
4-8
4-9
4-1
4-1
4-12
4-13
4-14
Title
..........................................
...........................................
Maximum Output
Continuous Rated Output
Maximum Torque and Fuel Consumption Ratio
......................................
................................
..............................................
of
ENGINE CONSTRUCTION
Cylinder. Crankcase
Main Bearing Cover
Crankshaft
Connecting Rod and Piston
Camshaft
Valve Arrangement
Cylinder
Governor
Cooling
0
Lubrlcatlon
1
Ignition
Carburetor
Air Cleaner
Sectional View
Head
.............................................
..
............................................
..........................................
...........................................
...........................................
..........................................
..........................................
..........................................
....................................
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...............................
.....................................
.........................................
of
Engine
.................................
at
Max . Output
.......
...............
Page
1
2
2
2
2
3
4
4
4
4
5
5
5
6
6
6
6
7
7
7
8
5
.
DISASSEMBLY and REASSEMBLY
5-1
5-2
5-3
5-4
6
.
MAGNETO
6-1
6-2
6-3
6-4
6-5
Preparation and Suggestion
Special
How
How
Tools
To
Disassemble
To
Reassemble
...............................................
Magneto
Breaker Point Adjustment
Timing Adjustment
Magneto Trouble Shooting
Solid
........
State
...............................
................................
.........................................
....................................
....................................
!
...................................
................................
.....................................
................................
Ignition
.....................................
12
12
12
14
18
28
28
28
29
30
30
Section
7
.
GOVERNOR ADJUSTMENT
8
.
CARBURETOR
8
.
1 Operation and Construction
8-2 Disassembly and Reassembly
9
.
BRAKE-IN OPERATION
.
ROBIN SOLID STATE IGNITION ENGINE
10
Title
............................................
of
REASSEMBLED ENGINE
...................................
...............................
..............................
.................
...........
Page
31
33
33
34
36
37
10-1 Features
10-2 Basic Theory of T
11
.
TROUBLE SHOOTING
1
1
.
1
Starting Difficulties
11 -2 Engine Misfires
11-3 Enginestops
11
-4
Engine Overheat
11
-5
Engine Knocks
-6
11
12
.
INSTALLATION
12-1 Installing
12-2 Ventilation
12-3 Exhaust Gas Discharge
12-4
12-5 Wiring
13
.
CHECKS and CORRECTIONS
Engine Backfires through Carburetor
Power
............................................
.
I.C.
..................................
.......................................
.....................................
........................................
.........................................
.......................................
........................................
.........................
...........................................
............................................
..........................................
...................................
Transmission
.............................................
to
Driven Machines
.......................
..................................
37
37
38
38
39
39
39
40
40
41
41
41
41
41
42
43
.
.
TABLE
14
15
.
MAINTENANCE and STORING
15-1 Daily Checks and Maintenance
15-2 Every
15
15-4 Every 100
15-5 Every
15-6 Every
15-7 Preparation for Long Abeyance
of
CORRECTION STANDARDS
-3
Every 50 Hours
20
Hours Checks and Maintenance
-
200 Hours (Monthly) Checks and Maintenance
500 - 600
1000
Hours (Yearly) Checks and Maintenance
...........................
.................................
.............................
.......................
(1 0 days) Checks and Maintenance
Hours
(Semiannual) Checks and Maintenance
.............................
44
49
49
49
................
..........
........
...............
49
49
50
50
50
1.
SPEC1
FICATIONS
Model
Type
I
Bore x Stroke (in)
I
Piston Displacement (cu. in)
I
Compression Ratio
Continuous Rated Output (HP/rpm)
Max. Output (HPIrpm)
Max. Torque (kg-m/rpm)
t
Rotation
Cooling System
Fubrication
I
Lubricant
I
Carburetor
~ ~ ~ ~~~~
Fuel
Fuel Consumption Ratio (gr/Hp-h)
1
1
I
I
I
I
Air-Cooled, 4-Cycle, Verticle Shaft, Single Cylinder Gasoline Engine
63 mm
EY15V
x
46
mm
(2.48" x 1.81")
143 cc (8.73 cu.
2.213,OOO
2.7/3,600
3.5/3,600
0.712,800
Counter-clockwise facing to
280
I
I
Reduction Ratio
Speed Governor
Ignition System
Spark Plug
Starting System Recoil Starter
Dry weight
Dimensions Width
I
(Ibs.)
Length (in)
(in)
Height (in)
I
(Solid
Flywheel Magneto Type Flywheel Magneto Type
State
Ignition is avilable
12.7
kg
(28 Ibs.)
371 mm (14.6")
(1
2.0")
I
67 mm x 52 mm (2.64" x 2.05")
~ ~~~
in)
Forced Air Cooling
Splashing Type
Automobile Oil
Horizontal Draft, Flat Type
Automobile Gasoline
at
continuous rated output operation
Approx. 1.5 liter
1
6.3
I
Gravity Type fuel Feed
(0.4
.183cc(11.17cu.in)
P.T.O.
Class
SC
U.S.
gal.)
-
Centrifugal Flyweight Type
as
option.) (Solid
NGK
(Rope
Type
BM4A
is
available, if required.)
State
14.5
383 mm ( 15.08")
31 1 mm (12.24") 305 mm
356 mm (14.02") 344 mm (13.5")
EYPOV
313,000
3.513.600
~~
4.613.600
0.9512.800
shaft
lgntion
kg
(31.9
_____
~~ ~
is
standard.)
Ibs.)
-
~~
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
~~
-
-
-
-
-
-
-
-L
-1
-
2.
PERFORMANCE
2-1 MAXIMUM
The maximum output of an engine is such standard power as developed by the engine, after its initial breakin period with all the moving parts properly worn in, when operating with a fully open throttle valve. Therefore, a new engine may not develop the maximum output in the beginning because the moving parts
in a properly worn-in condition.
2-2
CONTINUOUS
The continuous rated output of an engine is such power as developed by that engine when running continuously at an optimum speed, and most favorable from the viewpoint of engine life and fuel consumption ratio,
with the governor in operation. It
anism, with this engine
the continuous rated output specified.
2-3
MAXIMUM TORQUE
These mean the maximum torque of the output shaft and fuel consumption ratio at the maximum output of
an engine.
OUTPUT
RATED
as
OUTPUT
is
suggested., therefore, that when designing a driving system for any mech-
prime mover, the continous power requirement
and
FUEL CONSUMPTION
PERFORMANCE CURVE
MODEL EY15V
RATIO
at
MAXIMUM OUTPUT
are
of
that mechanism be kept below
not
HP
'If+
Recommended
Kg-rn
1
Operating
sj
Speed
Range
1
2000
I
I
I I
-2-
I
3000
-
Revolution
I
r.p.rn.
I
J
3600
5
PERFORMANCE CURVE
MODEL
EYZOV
1
.o
0.9
kg-m
Recommended Operating'Speed' Range-
I
I I
2000 3000
3.
FEATURES
1.
Compact, lightweight, durable, powerful 4-cycle air-cooled engine embodying ingenious design tech-
I
I
Revolution
I
I)
3600
r.p.m.
B-
niques and skilful workmanship.
2.
Simple construction, smart appearance, maximum easiness
of
start owing
to
automatic decompression
device
3.
For
EY
15V
option, and
engine Pointless Solid State igntion system
EY20V
engine
is
equipped with Pointless Solid State ignition system
is
newly adopted for preventing poor igniting as
as
standard specifica-
tions.
4.
Reliable prime mover for variety
of
purposes with smooth speed control by a governor under varying
load conditions.
5.
Economicai because fuel consumption
6.
Great versatility in installation by adopting recoil starter with eight different rope-pull directions and oil
drain available at bottom and carburetor side
is
very low.
of
engine, as standaed specifications.
-3-
4.
GENERAL
4-1
CYLINDER, CRANKCASE
DESCRIPTION
of
ENGINE CONSTRUCTION
The cylinder and crankcase are single piece aluminum die casting. The cylinder liner, made of special
cast iron, is built into the alminum casting. The intake and exhaust ports are located on one side of
the cylinder, and are also inserted into the casting.
The
crankcase is separable on the output shaft side,
to
where the main bearing cover is attached
I
(See Fig.
4-2
.)
MAIN BEARING COVER
it.
Fig.
1
The main bearing cover made of aluminum die casting is built onto the output shaft side of the crankcase
that the inside
of
the engine can readily be checked
by
simply removing the cover. It
is
provided with a flange
and boss for directly mounting on the machines.
Two
oil drains are also available. (See Fig. 2 and Fig.
Oil
Fig.
2
4-3
CRANKSHAFT
The crankshaft
crankpin
and
(See Fig.
is
a
oil
scraper press-fitted
4.)
is
forged
of
carbon steel, and the
induction-hardened. It has a crank gear
on
the output end.
3.)
Governor Gear
r
Fig.
3
Induction Hardening
/(Portion
of
Crankpin)
so
-4
Crank
Gear
/
(Press-fit)
Fig.
4
\
O;I
(Press-fit)
Scraper
-
0
4-4
CONNECTING
The
connecting rod is forged of aluminum alloy,
which itself serves as bearings at 'both the large and
small
ends.
is
The piston
for receiving two compression rings and one
(See Fig.
4-5
CAMSHAFT
The camshafts are integrally built with a cam gear of
special cast iron, and have intake and exhaust cams.
Also
the camshafts have aluminum plain bearing
attached to both ends.
(See Fig.
cast of aluminum alloy, and has grooves
5.)
6.)
ROD
(No
and
PISTON
ball bearing is used.)
oil
ring.
Fig.
5
Top
Ring
Second Ring
Oil
Ring
Connecting Rod
I
4-6
VALVE ARRANGEMENT
The exhaust valve is located upstream of the cooling
air with the result that the exhaust valve is intensively cooled for improved engine durability. The inner
side of the valve head is reinforced with hard alloy
Fig.
fused to it for added durability. (See
7.)
-5-
2
I
Fig..
Exhaust
DirecGon
Fig.
6
Valve
of
7
-
Coolin'g
Wind
4-7
CYLINDER HEAD
The cylinder head is an aluminum die casting, and
forms a Ricardo type combustion chamber with ample area for high combustion efficiency.
(See Fig.
8.)
4-8
GOVERNOR
The governor is a centrifugal flyweight type which
permits constant operation at the selected speed
against load variations. Governor gear is installed on
and
the bearing cover without fail,
the cam gear after reassembling.
(See Fig.
4-9
9.)
COOLING
it engages with
Main
-~
Governor Gear Complete
Fig.
Fig.
8
9
Governor
BQ
Sleeve
The cooling fan serving also as a flywheel cools the cylinder and cylinder head by forced air cooling. Cylinder
is
baffles
4-10
The rotating and sliding parts are being lubricated by
scooping and splashing the oil in the crankcase with
the
(See
provided for guiding the cooling air
LUBRICATION
oil
scraper attached to the crankshaft.
Fig.
10.)
-6-
I
Oi
I
Scraper
Fig.
-
70
4-
11 11
IGNITION
e
The ignition system
of
11
a
and
composed
shaft, and the ignition coil in the crankcase. (For further details, ' refer to Section the Magneto.)
(See Fig.
4-112
CARBURETOR
is
flywheel
Fig.
12.)
a flywheel magneto type with ignition timing set at
and
ignition coil. The flywheel serving
Fig.
1
1
also
as
a
fan is mounted directly
23"
before TDC. The magneto is
on
the crank-
Fig.
12
A
horizontal draft carburetor is employed. It has
been carefully set after thorough tests to assure satisfactory start up, acceleration, fuel consumption, out-
put performance, etc.
For construction and other details, refer to the Section on Carburetor Construction, Disassembly and
Reassembly.
AIR
Fig.
13.)
CLEANER
of
14.)
the standard type engine
is
an ob-
(See Fig.
4-93
The air cleaner
long type using a sponge element.
(See
Fig.
13
-7-
Cleaner Case Cleaner Cover
/
Cleaner Element
Fig.
14
4-14
SECTIONAL
VIEW
of
ENGINE
MODEL
-8-
EY15V
Air
Cleaner Muffler Cover
/::;::
MODEL EY15V
-9-
Main
Bearing
Oil
Scraper
Crankshaft
’piston Pin
Cover
MODEL
-
10-
EY20V
Oil
Filler’
MODEL
-
EY20V
11
-
5.
DISASSEMBLY
5-
1
PREPARATIONS
1)
When disassembling the engine, remember well the locations
sembed correctly.
and
and
If
you are uncertain
REASSEMBLY
SUGGESTIONS
of
identifying some parts,
them.
2)
Have boxes ready
3)
To
prevent missing and misplacing, temporarily assemble each group
4)
Carefully handle disassembed parts,
5)
Use the correct
5-2
SPECIAL
TOOLS
to
keep disassembed parts by group.
and
clean them with washing oil.
tools
in the correct way.
of
individual parts
it
is suggested that tags be attached
of
disassembed parts.
so
that they can be reas-
/"-
to
For your reference, the following shows special tools
tion Instruments.
~
Tool
Flywheel Puller
bolt)
(with
Valve Spring
Retainer
Use
For
pulling
Flywheel
For
mounting and
dismounting Valve
Spring Retainer
and Retainer
off
Lock
of
Robin Engine for Disassembly, Measuring and Inspec-
Applicalbe
Model
EY10,13,14
EY15,
EC05.07,
EY25,27,33
EY35,40,44
18, 20
EY 25,27, 33
EY35,40,44
10
EC17,25.37
EY10,13,14
EY15,18,20
Shape
Valve Guide
Puller
For
pulling
Valve guide
off
EY13, 14
-
12
-
Part
No.
2069500107
Tool
Use
Applicalbe
Model
EY
18
Shape
227 95001 07
207 95001 07
“20248
Valve Guide
Puller
Timing Tester
For pulling
Valve guide
For
adjusting
timing
off
EY
15,20
EY25,27
EY10, 13, 14
EY 15,18,20
EY25,27,33
EY35,40,44
EC03,04,05
EC07,10,
17
EC25,37
-
13-
5-3
HOW
TO
DISASSEMBLE
Order
Recoil starter
1
FueI tank (1) Close the fuel cock.
2
~
3
Muffler and
muffler cover
4 Air cleaner
Governor lever
and the relative
parts
Item
*Length
(1)
(2) From the carburetor disconnect the fuel
of
the bolt indicates the length
Remove the recoil starter.
64 x 8
mm bolt: 4 pcs.
from
the bolt head bottom surface
Remarks
to
the threaded end.
Tool Procedures
10
mm box spanner
10
mm box spanner
10
mm box spanner
/"-.
pipe between the fuel strainer and carbu-
of
retor on the side
(3)
Remove the tank band and fuel tank from
the carburetor.
the fuel tank bracket.
~~
6@ x 12 mm bolt: 2 pcs.
~~
(1) Remove the muffler and muffler cover from
the cylinder portion of the crankcase.
8@
x
100
8@
mm bolt: 2 pcs. (EY 15V)
x
106
mm bolt: 2 pcs. (EY2OV)
~~~ ~~ ~ ~
(1) Remove the air cleaner cover and element.
(2)
Loosen the intake manifold mounting nut.
69 nut: 2 pcs.
(3)
Remove the air cleaner case from the car-
Note that the EY20V
has
2
sheets
of
and
1
sheet
of
gasket
flange
between the muffler
and cylinder.
Air cleaner is fastened
together with the carburetor.
12 mm box spanner
or 12 mm spanner
10 mm box spanner
buretor and fuel tank bracket.
2
pcs.
69 nut:
(4)
Disconnect the breather pipe.
(1) Remove the choke lever from the fuel tank
bracket and remove the choke rod from
6$ x 14 mm bolt: 1 pce.
Special
bolt
14 mm box spanner
or 14 mm spanner
the carburetor,
Special bolt:
(2) Remove the governor lever from the
governor lever shaft.
64
x
(3)
25
Remove the governor rod and rod spring
1
pce.
mm bolt: 1 pce.
Just loosen the bolt,
to
unnecessary
the
10
mm box spanner
from the carburetor.
(4)
Remove the governor spring from the
speed control lever.
Carburetor
Intake manifold
Fuel tank
8
bracket
(1) Remove the carburetor from the intake
manifold.
~
(1)
~~
Remove the intake manifold from the
of
cylinder portion
6q5
nut: 2 pcs.
the crankcase.
(1) Remove the fuel tank bracket from the
crankcase.
64
x
14 mm self-tapping bolt: 2 pcs.
64
x
10
mm bolt: 2 pcs.
\
Rod
Governor Lever
/
Spring
Governor
\
Shaft
Fig.
Choke
Rod
75
Speed Control Lever
Fuel Tank Bracket
"--
Lock
Bolt
10
mm box spanner 7
10
mrn box spanner
-
14-
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