Start-In-Gear Protection; Engine Oil Requirements; Fuel Requirements; Gasoline - Yamaha F4B Owner's Manual

Specifications and requirements
need to reduce your throttle setting to stay
within the recommended engine speed range
when carrying lighter loads.
To check the propeller, see page 57.
1. Propeller diameter in inches
2. Propeller pitch in inches
3. Type of propeller (propeller mark)
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.
Recommended engine oil:
4-stroke outboard motor oil
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)
If oil grades in recommended engine oil group
1 are not available, select an alternative oil
grade from recommended engine oil group 2.
11
x -
1 2 3
ZMU06853
Recommended engine oil group 1
Recommended engine oil group 2
EMU36360

Fuel requirements

EMU40210

Gasoline

Use a good quality gasoline that meets the
minimum octane rating. If knocking or pinging
occurs, use a different brand of gasoline or
premium unleaded fuel. Yamaha recomends
that you use alcohol-free (see Gasohol) gas-
oline whenever possible.
Recommended fuel:
Regular gasoline
ECM01981
NOTICE
Do not use leaded gasoline. Leaded gas-
G
oline can seriously damage the engine.
ZMU06854
ZMU06855