Checking The Cooling Water Pilot Hole; Test Run; Break-In - Yamaha E115A Service Manual

Checking the cooling water pilot hole

1. Start the engine, then check that the
cooling water is discharged from the
cooling water pilot hole.

Test run

1. Start the engine, and then check that the
gear shift operates smoothly.
2. Check the engine idle speed after the
engine has been warmed up.
3. Operate at trolling speed.
4. Run the outboard motor for 1 hour at
3,000 r/min or at half throttle, then for
another hour at 4,000 r/min or at 3/4
throttle.
5. Check that the outboard motor does not
tilt up when shifting into reverse and that
water does not flow in over the transom.
NOTE:
The test run is part of the break-in operation.
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Break-in

During the test run, perform the break-in
operation in the following 5 stages.
1. 10 minutes a at the lowest possible
speed. A fast idle in neutral is best.
2. 50 minutes b at 1/2 throttle (approxi-
mately 3,000 r/min) or less. Vary engine
speed occasionally. On an easy-planing
boat, accelerate at full throttle onto plane,
then immediately reduce the throttle to
3,000 r/min or less.
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3. 1 hour c at 3/4 throttle (approximately
4,000 r/min). Vary engine speed occa-
sionally. Run at full throttle for 1 minute,
then allow about 10 minutes of operation
at 3/4 throttle or less to let the engine
cool.
4. 8 hours d at any speed, but avoid oper-
ating at full throttle for more than 5 min-
utes at a time. Let the engine cool
between full-throttle runs. Vary engine
speed occasionally.
5. After the first 10 hours. Use standard pre-
mix ratio of fuel and oil. Refer to page 1-
12.
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