Yamaha 4 Stroke Owners Manual

Safety information
6
Overtaking
If you are passing another vessel, you are the
“Give-Way” vessel. This means that the other
vessel is expected to maintain its course and
speed. You must stay out of its way until you
are clear of it. Likewise, if another vessel is
passing you, you should maintain your speed
and direction so that the other vessel can
steer itself around you.
EMU25531Other special situations
There are three other rules you should be
aware of when driving your boat around other
vessels....

Safety information
7
Many bodies of water used by boaters are en-
tirely within the boundaries of a particular
state. The Uniform State Waterway Marking
System has been devised for these waters.
This system uses buoys and signs with dis-
tinctive shapes and colors to show regulatory
or advisory information. These markers arewhite with black letters and orange boarders.
They signify speed zones, restricted areas,
danger areas, and general information.
Remember, markings may vary by geograph-
ic location....

General information
8
EMU25171
Identification numbers recordEMU25183Outboard motor serial number
The outboard motor serial number is stamped
on the label attached to the port side of the
clamp bracket.
Record your outboard motor serial number in
the spaces provided to assist you in ordering
spare parts from your Yamaha dealer or for
reference in case your outboard motor is sto-
len.
1. Outboard motor serial number location
ZMU06705
1
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General information
9
EMU33520
Read manuals and labels
Before operating or working on this motor:

Read this manual.

Read any manuals supplied with the boat.

Read all labels on the outboard motor and the boat.
If you need any additional information, contact your Yamaha dealer.
EMU33831Warning labels
If these labels are damaged or missing, contact your Yamaha dealer for replacements.
F4, F6
4 
1
2
3
ZMU06709
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General information
10
ZMU06860
12
3
4
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General information
11
EMU35132Symbols
The following symbols mean as follows.
Notice/Warning
Read Owner’s Manual
Hazard caused by continuous rotationElectrical hazard
ZMU05696
ZMU05664
ZMU05665
ZMU05666
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Specifications and requirements
12
EMU38090
Specifications
TIP:
“(AL)” stated in the specification data below
represents the numerical value for the alumi-
num propeller installed.
TIP:
“*” means, select the engine oil referring to the
chart of engine oil paragraph. For further infor-
mation, see page 14.
EMU2821G
Dimension:
Overall length:
557 mm (21.9 in)
Overall width:
329 mm (13.0 in)
Overall height S:
1039 mm (40.9 in)
Overall height L:
1166 mm (45.9 in)
Transom height S:
435 mm (17.1 in)
Transom...

Specifications and requirements
13
Recommended engine oil group 1*:
SAE 10W-30/10W-40/5W-30 
API SE/SF/SG/SH/SJ/SL
Recommended engine oil group 2*:
SAE 15W-40/20W-40/20W-50 
API SH/SJ/SL
Engine oil quantity:
0.6 L (0.63 US qt, 0.53 Imp.qt)
Lubrication:
Wet sump
Recommended gear oil:
Hypoid gear oil SAE#90
Gear oil quantity:
0.100 L (0.106 US qt, 0.088 Imp.qt)
Tightening torque for engine:
Spark plug:
13.0 Nm (1.33 kgf-m, 9.6 ft-lb)
Engine oil drain bolt:
18.0 Nm (1.84 kgf-m, 13.3 ft-lb)
EMU33554...

Specifications and requirements
14
EMU39190
Start-in-gear protection
Yamaha outboard motors are equipped with
start-in-gear protection device. This feature
permits the engine to be started only when it
is in neutral. Always select neutral before
starting the engine.
EMU39691
Engine oil requirements
Select an oil grade according to the average
temperatures in the area where the outboard
motor will be used.
If oil grades in recommended engine oil group
1 are not available, select an alternative oil
grade...

Specifications and requirements
15

Avoid getting water and contaminants in
the fuel tank. Contaminated fuel can
cause poor performance or engine dam-
age. Use only fresh gasoline that has
been stored in clean containers.
Gasohol
There are two types of gasohol: gasohol con-
taining ethanol (E10) and that containing
methanol. Ethanol can be used if the ethanol
content does not exceed 10% and the fuel
meets the minimum octane ratings. E85 is a
fuel containing 85% ethanol and must not be
used in your...