Test Run; Break-In; After Test Run - Yamaha F50F Service Manual

GEN
INFO

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
2,000 r/min or at half throttle, then for
another hour at 3,000 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.

Break-in

During the test run, perform the break-in
operation in the following three stages.
1. One hour a at 2,000 r/min or at approxi-
mately half throttle
2. One hour b at 3,000 r/min or 3/4 throttle
and 1 minute out of every 10 at full throt-
tle
3. Eight hours c at any speed, however,
avoid running at full speed for more than
5 minutes
a b
È
0 1
È Hour
1-17
General information
c
2 10
S69J1240

After test run

1. Check for water in the gear oil.
2. Check for fuel leakage in the cowling.
3. Flush the cooling water passage with
fresh water using the flushing kit and with
the engine running at idle.
6C13G11