Yamaha F225F Service Manual page 546

MNT
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
operation:
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 b
A
0 1
A Hour
After test run
1. Check for water in the gear oil.
2. Check for fuel leakage in the cowling.
3. Flush the cooling water passages using
fresh water. NOTICE: When flushing
the cooling water passages, do not
start the engine. Otherwise, the water
pump could be damaged and the
engine could be severely damaged
due to overheat.
10-7
Maintenance
c
2 10
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 anode" (7-
60), "Checking the cylinder block anode"
(7-90), "Checking the oil cooler anode"
(7-67), "Checking the lower unit anode"
(8-4), "Checking the exhaust guide
anode" (9-16), and "Checking the clamp
bracket anode" (9-27).
Checking the battery
1. Check the battery. See "Checking the
battery" (10-3).
Checking the cooling water passage
1. Remove the water inlet covers a and b
and trim tab c.
2. Check the water inlet covers a and b
and cooling water inlets. Clean if
clogged.