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Yamaha F40B - Checking the Cooling Water Pilot Hole; Test Run; Break-In

Yamaha F40B
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GEN
INFO
General information
1-19 67C3K11
3. Check that the engine turns off when the
clip is pulled from the engine shut-off
switch.
È H model
É R model
Checking the cooling water pilot
hole
1. Place the lower unit in water, and then
start the engine.
2. Check for water flow at the cooling water
pilot hole.
NOTE:
Make sure that the cooling water hoses are
securely connected and that the flushing
hose joint adapter 1 is not loose or dam-
aged.
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
varying speeds up to 2,000 r/min or
approximately half throttle, then, for
another hour, increase engine speed as
much as necessary to put the boat on
plane (but avoid full-throttle operation).
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
Run the engine under load (in gear with a
propeller installed) for 10 hours as follows.
1. For the 1st hour a of operation:
Run the engine at varying speeds up to
2,000 r/min or approximately half throttle.
2. For the 2nd hour b of operation:
Increase engine speed as much as nec-
essary to put the boat on plane (but avoid
full-throttle operation), then back off on
the throttle while keeping the boat at a
planing speed.
3. For the remaining 8 hours c of opera-
tion:
Run the engine at any speed. However,
avoid operating at full throttle for more
than 5 minutes at a time.
S67C1042
È
É
S67C1044
1

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