Yamaha F150A, Service Manual

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10-8
General periodic maintenance
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A
Break-in
Operate the engine under load (in gear with a
propeller installed) for 10 hours as follows:
1. For the first hour “a” of operation:
Operate the engine at varying speeds up
to 2000 r/min or approximately 1/2 throt-
tle.
2. For the second hour “b” of operation:
Increase the engine speed until the boat
is on plane (but do not fully open the
throttle), and then back off on the throttle
while keeping the boat at a planing
speed.
3. For the remaining 8 hours “c” of opera-
tion:
Operate the engine at any engine speed.
However, do not operate the engine at
full throttle for more than 5 minutes at a
time.
4. After the first 10 hours of operation:
Operate the engine normally.
A. Hour
After test run
1. Check for water in the gear oil.
2. Check all the fuel lines for leakage.
3. Flush the cooling water passages using
fresh water.
When flushing the cooling water pas-
sages, do not start the engine. Otherwise,
the water pump could be damaged and
the engine could be severely damaged
due to overheating.
TIP:
When using the flushing device (flushing
hose joint adapter), flush the cooling water
passages without starting the engine.
General periodic maintenance
Checking the anode
Do not apply grease, oil, or paint to the
anodes or the trim tab.
1. Check the anodes and trim tab. See
“Checking the cylinder head and cylinder
block anode” (7-45), “Checking the
exhaust cover anode” (7-50), “Checking
the lower unit anode” (8-3), and “Check-
ing the clamp bracket anode” (9-30).
TIP:
Replace the anodes or trim tab if eroded.
Also, check the ground lead.
Checking the battery
1. Check the battery. See “Checking the
battery” (10-4).
Checking the cooling water inlet
1. Remove the water inlet covers “1” and
“2”.
2. Mark the trim tab “3” with an identification
mark “a”, and then remove the trim tab
“3”.
3. Check the water inlet covers and water
inlets. Clean if clogged.
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