Operation
26
EMU36381
First-time operation
EMU30174
Breaking in engine
Your new engine requires a period of break-in
to allow mating surfaces of moving parts to
wear in evenly. Correct break-in will help en-
sure proper performance and longer engine
life.
NOTICE:
Failure to follow the break-in
procedure could result in reduced engine
life or even severe engine damage.
[ECM00801]
EMU27050
Gasoline and engine oil mixing chart
(25:1)
NOTICE
ECM00150
Be sure to mix gasoline and oil complete-
ly, otherwise the engine may be damaged.
EMU27074
Procedure for pre-mixed models
Run the engine under load (in gear with a pro-
peller installed) for 10 hours as follows.
1.
First 10 minutes:
Run the engine at the lowest possible
speed. A fast idle in neutral is best.
2.
Next 50 minutes:
Do not exceed half throttle (approximate-
ly 3000 r/min). Vary engine speed occa-
sionally. If you have an easy-planing
boat, accelerate at full throttle onto plane,
then immediately reduce the throttle to
3000 r/min or less.
3.
Next two hours:
Accelerate at full throttle onto plane, then
reduce engine speed to three-quarter
throttle (approximately 4000 r/min). Vary
engine speed occasionally. Run at full
throttle for one minute, then allow about
10 minutes of operation at three-quarter
throttle or less to let the engine cool.
4.
Remaining seven hours:
Run the engine at any speed. However,
avoid operating at full throttle for more
than 5 minutes at a time.
5.
After the first 10 hours:
Operate the engine normally. Use the
standard premix ratio of gasoline and oil.
For details on mixing fuel and oil, see
page 28.
EMU36400
Getting to know your boat
Different boats handle differently. Operate
cautiously while you learn how your boat han-
dles under different conditions and with differ-
ent trim angles (see page 35).
EMU36412
Checks before starting engine
WARNING
EWM01920
If any item in the checks before starting
engine is not working properly, have it in-
spected and repaired before operating the
outboard motor. Otherwise an accident
could occur.
NOTICE
ECM00120
Do not start the engine out of water. Over-
heating and serious engine damage can
occur.
EMU37141
Fuel level
Be sure you have plenty of fuel for your trip. A
good rule is to use 1/3 of your fuel to get to the
destination, 1/3 to return, and to keep 1/3 as
1.
: Gasoline
2.
: Engine oil
U63V1EE0.book Page 26 Tuesday, March 3, 2009 10:50 AM
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2019 Yamaha Motor Corporation, U.S.A.
