Breaking In Engine; Gasoline And Engine Oil Mixing Chart (50:1); Procedure For Oil Injection Models - Yamaha 70 Owner's Manual

Operation
board (if packed). For details, consult
your Yamaha dealer.
EWM00650
WARNING
Avoid using bolts, nuts or washers other
than those contained in the engine pack-
aging. If used, they must be of at least the
same quality of material and strength and
must be tightened securely. After tighten-
ing, test run the engine and check their
tightness.
1
1. Bolts
EMU27020

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.
ECM00140
CAUTION:
Failure to follow the break-in procedure
G
could result in reduced engine life or
even severe engine damage.
Premix fuel must be used during break-
G
in in addition to oil in the oil injection
system.
25
EMU27060
Gasoline and engine oil mixing chart
(50:1)
1.
2. : Engine oil
ECM00150
CAUTION:
Be sure to mix gasoline and oil complete-
ly, otherwise the engine may be dam-
aged.
EMU30311
ZMU02014

Procedure for oil injection models

Run the engine under load (in gear with a
propeller 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 (approxi-
mately 3000 r/min). Vary engine speed
occasionally. If you have an easy-plan-
ing 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-quar-
ter 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
: Gasoline