The information in this guide is based on 2014 model specification information available at the time
when the guide has been issued.
Throughout this guide, Worldwide model names are given first followed by US and Canada model
names in parentheses for descriptive purpose.
For Australia and New Zealand, US and Canada model names are used for 4-stroke 150HP and
larger models.
In this guide, particularly important information is distinguished in the following ways.
A WARNING indicates a hazardous situation which, if not avoided, could result in death or
serious injury.
A NOTICE indicates special precautions that must be taken to avoid damage to the products
or other property.
Specifications and descriptions are subject to change without notice.
The PDF file is available from the service portal site maintained by Yamaha Motor Co., Ltd.
The following contracted terms are expediently used in this guide.
ASSY: assembly
DEC: Digital Electronic Remote Control
ECM: Electronic Control Module
EXT: extension
GND: ground, (–)
IG: ignition
LED: light emitting diode
MGT: management
NA: not applicable, not available
OP: optional
P/N: part number
PTT: power trim & tilt
PWR: power
RC: remote control
STD: standard
STR: steering
SW: switch
TBD: to be determined
The following pictographs are important sign to handle the crate.
Read the NOTICE and understand what pictographs mean to avoid a damage to the product when
handling, transporting and/or keeping the crate.
* Photo shows F350.
ENGINE OIL REMINDER TAG (4-STROKE ENGINES)
This tag is hung around the bottom cowling or the bracket to indicate that there is no engine oil in
the oil pan when the outboard motor is uncrated.
1-2
UNCRATING PROCEDURE
WARNING
(1)
(2)
(3)
(4)
(5)
(FOR TYPICAL STEEL FRAME)
Wear gloves to avoid injury by sharp steel
edges while uncrating.
This is an example of the steel crate for V6
models.
For other steel crate models, refer to this procedure for uncrating the steel frame.
1. Inspect the crate for shipping damage. If
any damage has been found, consult your
Yamaha dealer.
2. Cut the strap (1).
4. Remove the bottom bolts (3).
5. Lift the top frame (4) straight up.
3. Lift the top cover (2) straight up to remove.
6. Remove the wrapping (5), and inspect the
outboard motor for concealed damage. If
any damage is found, consult your Yamaha
dealer.
8. If the lifting points are covered by the flywheel cover, remove it.
9. Attach a lifting harness (7) securely to the
lifting points (8), and tighten the harness.
For 4-stroke V8, V6 (4.2L) and L4 (2.8L,
1.8L) engines, install the lifting attachment
(A) to the flywheel using the exclusive 3
bolts (B), insert the eye bolt (C) to the
attachment, attach a lifting harness (D) to
the eye bolt, and tension the harness.
M10 bolt (B) torque:
36 Nm, 3.6 kgf•m, 27 ft•lb
* Special service tool for 4-stroke V8, V6 (4.2L)
and L4 (2.8L) engines: Lifting eye kit (P/N:
90890-06820)
Lifting eye kit contents:
To be continued.
1-4
UNCRATING PROCEDURE
WARNING
(9)
(10)
*C/L: Centerline of the transom.
C/L
(a)
(b)
(c)
(d)
To be continued.
MOUNTING THE OUTBOARD
(FOR TYPICAL STEEL FRAME)
10. Carefully lift up the motor with the bottom
crate so that the lifting-harness does not
contact the engine components.
Have a helper hold the frame to avoid injury
while lifting.
11. Remove the skeg holder (9) if it is attached.
MOTOR
Overpowering a boat may cause severe
instability. Never install an outboard motor
that exceeds the maximum boat horsepower rating capacity. If a boat does not
have the capacity plate, ask to the boat
manufacturer.
Proper mount of outboard motor will obtain
better engine performance, product reliability,
fuel economy, customer satisfaction, etc.
This chapter describes the brief summary of
outboard motor mount.
For the first requirement, make sure the outboard motor has clearance for full movement,
from port to starboard, as well as during tilt
operation.
For the motor dimensions, see the later pages.
1. Set an outboard motor on the vertical center
line of boat transom.
Measurement points are shown in the illustration.
12. Remove the bracket bolts (10).
No strakes hull
Make a same radius (R) at both sides of hull,
and have another measurement points.
C/L
RR
(a)
(c)
(b)
(d)
Strakes hull
Make measurements between port and starboard strakes.
1-5
MOUNTING THE OUTBOARD
(T1)
C/L
(e)
(f)
(T1)(T1)
C/L
(T1)(T1)
C/L
(T1)
MOTOR
Recheck the measurements, and verify the
boat transom vertical centerline is straight.
Measurements (a) and (b) should be the
same, and measurement (c) and (d) should be
the same.
For twin engine application, set the engines
so that the distance between the boat transom
center line and the motor center line should be
equal for the both engines.
For triple engine application, set the engines
as shown below.
If a boat has V-hull, the center motor should
use longer transom motor than outside
engines.
For quad engine application, set the engines
as shown below.
If a boat has V-hull, inner twin engine should
use longer transom motor than outside
engines.
Measurements (e) and (f) should be the same.
Maintain a minimum distance (T1) that is the
measurement between both vertical centerlines of outboard motor.
Minimum distance (T1) is recommended on
each model, and its data is put on the dimension item.
To be continued.
1-6
MOUNTING THE OUTBOARD
0~25 mm (1 in.)
(a)
C/L
0~25 mm
(1 in.)
(a)
0~25 mm
(1 in.)
Twin engine application
Quad engine application
0~25 mm
(1 in.)
(a): Anti-cavitation plate
C/L
0~25 mm
(1 in.)
0~25 mm
(1 in.)
0~25 mm
(1 in.)
(a)
90
13 mm
(0.5 in.)
C/L
(H)
13 mm (0.5 in.)
(H)
(H): Motor transom height
Height position of
anti-cavitation plate
MOTOR
2. Adjust the height of outboard motor so that
the anti-cavitation plate is positioned to the
boat transom bottom, or lowered within 25
mm (1 in.).
For planing boats, the anti-cavitation plate
should be positioned to the boat transom
bottom or slightly higher.
Single engine application
Twin engine application/Quad engine
application
* Due to combination of a boat type and an engine
type, the mount height of outboard motor varies.
Therefore, the complete information is impossible
to describe here.
For further information, see the instructions
issued by boat manufacturer, or ask to the manufacturer.
3. When the outboard motor mount position
has been determined, mark the 4 symmetrical mount hole positions onto the boat transom. Make the mount holes of 13 mm (0.5
in.) vertically on the marking points.
* To make the mounting holes easier, use the drill-
ing plate (P/N: 90890-06783 or YB-34465 for US).
Triple engine application
Ex: Drilling plate (90890-06783)
To be continued.
1-7
MOUNTING THE OUTBOARD
NOTICE
(a)
For reference:
(a)
(b)
(b)
(d)
(d)
(b)
(b)
(c)
(c)
(a) Mounting bolt
(b) Small washer
(c) Large washer
(d) Nut
som mount bolt depending on the boat transom thickness.
4. Apply sealant to the mount holes, and secure the motor with supplied mount hardware.
For tightening procedure, first tighten the inside nut, then the double nuts each other.
Make sure there is no clearance between
boat transom and motor clamp bracket.
Otherwise, the clamp bracket could break.
* The upper mount bolt is usually installed to
the 2nd hole from top.
Boat transom
thickness (T)
55 – 65 mm
(2.17 – 2.56 in.)
65 – 75 mm
(2.56 – 2.95 in.)
75 – 95 mm
(2.95 – 3.74 in.)
95 – 115 mm
(3.74 – 4.53 in.)
* High tension bolt is recommended for F350.
Mount bolt sizeBolt P/N
M12 ×115 mm90101-12M03
M12 ×130 mm90101-12M05
M12 ×150 mm90101-12M77
M12 ×150 mm
[High tension bolt]
M12 ×170 mm
[High tension bolt]
90101-12031
90101-12036
* Tighten the mounting bolts/nuts to suitable torque
depending on the boat transom structure, material, design, etc.
1-8
MOUNTING THE OUTBOARD MOTOR
Water surface
(H)
WATER LEVEL GUIDELINE (4-STROKE ENGINES)
If you replaced 2-stroke engine to 4-stroke engine which has the same horse power, a boat tends to
become “stern heavy” because of heavier engine weight.
As a result, water line will rise and get close to the power head.
This causes poor engine performance, and water could easily enter into the cylinder(s) and damage
the engine.
Therefore, you should consider the water level guideline when installing a 4-stroke outboard motor.
When mooring a boat with a maximum boat load, maintain the minimum height (H) shown in the
illustration between the water surface and the clamp bracket seating point.
Minimum height between water surface and bracket seating point
ModelMin. height (H)
Carbureted F2 – F60150 mm5.9 in
Fuel injected F40 (4-cyl) – F70100 mm3.9 in
F75 and above100 mm3.9 in
1-9
MOUNTING THE OUTBOARD
(b)
(a)
7.5 – 15 m (25 – 50 ft)
MOTOR
ADJUSTING TWIN ENGINES
Set the engines in the toe-out position, and
measure the distances between the two
engines at the center point of the rear (a) and
front (b) of the lower casing. The difference
between measurement (a) and measurement
(b) should not exceed 25 mm (1 in.).
MAX. BOAT SPEED ESTIMATION
Depending on the engine power, boat length
and boat weight, the maximum boat speed can
be generally estimated with the calculation formula as below.
V = 1.398L (PS/)
V = Estimated maximum boat speed (km/h)
L = Boat length (m)
PS = Prop shaft output power
= Displacement volume (ton)
For example:
Boat length = 8 m (27 ft)
Engine power = 250 ps
Displacement volume = 3 ton (3000 kg)
0.623
*water line
*water line
* Adjustment: (b) – (a) = Within 25 mm (1 in)
For best result, your toe-out distance should
be set so that the twin engines wake meets
approximately 7.5 – 15 m (25 – 50 ft) past the
stern of the boat.
Max. boat speed [V] = 1.3988 (250/3)
0.623
= 62.2 km/h (38.6 mph)
* This should be only used as a reference.
The maximum boat speed varies depending on
the hull design, rigging state, passengers weight,
engine weight, engine position, etc.
Confirm the actual boat speed by test run.
1-10
MOUNTING THE REMOTE OIL
320 (12.6)
180 (7.1)230 (9.1)
mm (in.)
180 (7.1)
508 (20)
235 (9.3)
mm (in.)
250 (9.8)
200 (7.9)
170 (6.7)
6.5 (0.26)
40 (1.6)
200 (7.9)
25 (1.0)
112
(4.4)
30
(1.2)
173
(6.8)
210 (8.3)
160 (6.3)
130 (5.1)
30
(1.2)
mm (in.)
TANK
The remote oil tank is required for 2-stroke V4
and V6 oil injection engines.
REMOTE OIL TANK DIMENSIONS
10.5 liter (2.8 US gallons) tank
P/N: 6E5-21733-20
18 liter (4.8 US gallons) tank
P/N: 6E5-21733-30
Oil tank holder
NOTICE FOR MOUNTING THE REMOTE
OIL TANK
Follow the notifications below, for the remote
oil tank installation.
• Mount the oil tank in as dry as possible location to avoid water entering into the oil tank.
• Mount in a location that will allow service to
the filter located on the remote oil tank.
• Mount the remote oil tank lower than the
engine oil tank.
If the remote oil tank is mounted higher than
the top of the engine because of the boat
type, an optional check valve (P/N: 6R524408-00) shown below is required.
Install the check valve on the oil hose
between the engine and remote oil tank to
prevent siphoning of oil to the engine and
spillage.
• Route the oil hose between the engine and
the remote oil tank without pinching and
kinking.
1-11
OUTBOARD MOTOR DIMENSIONS
OVERALL DIMENSION ITEMS
SymbolDefinition and Description
L1Horizontal distance from datum point to rearmost point of power unit
L2Horizontal distance from datum point to forefront (depends on the model) of power unit
L3
L4Horizontal distance from datum point to rearmost point of the lower case
L5
L6
L7
L8
L9Horizontal forward protrusion of lower case from the datum line when PTT is fully trimmed down
L10Horizontal distance from datum point to bracket shaft (bolt) center
H1Vertical distance from datum point to lowest point of motor
H2Vertical distance from datum point to highest point of power head
H3Vertical distance from anti-cavitation plate undersurface to the center of propeller shaft
H4Vertical distance from datum point to anti-cavitation plate undersurface
H5Vertical distance from datum point to tiller handle tip when the handle is in vertical position
H6
H7Vertical distance from datum line to protruded forefront when motor is tilted up (over-tilt position)
H8
H9Vertical distance to the highest point of the motor when it is tilted up (over-tilt position)
H10Vertical distance from datum point to bracket shaft (bolt) center
H11
W1Leftward protrusion from center line of motor body when looking at the front face
W2Distance from tiller handle tip to centerline of motor body when looking at the front face
W3Distance from centerline to left or right edge of motor body, except for levers and handles
W4
W5Distance from centerline to the farthest point on the body when steered to the maximum angle
W6
A1Maximum steering angle each way (symmetrical), from centerline of motor body
A2Tilt up angle (whole rotating range to over-tilt angle including negative trim angle)
A3Maximum negative trim angle from the vertical line through the datum point
T1Centerline-to-centerline minimum distance of the engines in case of twin installation
Distance from datum point to farthest point on tiller handle, when the handle is in horizontal position (in use)
Minimum distance from transom board or its extension to forefront of the lower case, with motor
fully trimmed down and steered to the full
Horizontal distance from datum point to rearmost point of protrusion when motor is tilted up (overtilt position)
Horizontal distance from datum point to protruded forefront when motor is tilted up (over-tilt position)
Horizontal distance from datum point to lowest point of protrusion when motor is tilted up (over-tilt
position)
Vertical distance from skeg tip at H1 to the lowest point of lower unit when motor is tilted up (overtilt position)
Vertical distance from datum line to lowest point of protrusion when motor is tilted up (over-tilt
position)
Difference in the height of lower unit lowest point comparing to the height in the standard position
and with PTT in the fully trimmed down position.
Distance from centerline to left or right end of motor body protrusion, except for levers and handles
Distance from centerline to the farthest point on the tiller handle when steered to the maximum
angle