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Yamato 302 - Post-Operation Motor Care; Recovering a Submerged Motor

Yamato 302
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I
I - 6 Care of Motor After Use
A. Wipe spilled gasoline with clean rag.
B. Wipe water, around powerhead.
C. If motor has been used in salt water, flush motor internally as well as externally with
fresh water. CAUTION: Do not tip motor upside down. Water can enter the exhaust
port and can cause serious damage.
D. CAUTION: When laying motor on its side, be sure the exhaust side faces down.
II - 7 Submerged Motor
A. If motor, is submerged in water for any reason, take the following action immediately:
1. Remove propeller.
2. Remove spark plug and cylinder head (remove cylinder head only when sub-
merged at high speed). Cylinder head gasket is often bIown due to hydraulic ham-
mer. The gasket acts as a fuse which minimises further internal damage.
3. Turn motor by hand. If complete revolution is possible without any bind, complete
the following:
a. If motor has been submerged in salt water, flush motor with fresh water through
carburettor while turning motor slowly. CIean exterior parts with fresh water.
b. Remove starter pulley and coil plate assembly (see par III-2). Flush with clean
fresh water. Clean and dry all electrical parts. Reinstall starter pulley only.
c. Drain fuel tank, fuel line and carburettor.
d. Set motor with cylinder head facing down.
e. Crank motor several times.
f. Turn motor so that exhaust-side is facing down.
g. Repeat step e.
h. Repeat step d.
i. Crank motor. Repeat step d thru h untiI all water is expelled.
j. Flush with fresh mixture of petrol and oil.
k. Repeat step d thru h until most of the petrol and oil mixture is expelled. Wipe
all petrol and oil that may have spilled on motor.
I. Reassemble magneto assembly.
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