250
POWERHEAD
ASSEMBLY
or just below the surface of piston. Rings must
move freely in piston ring groove.
Bearings
Inspect center main bearing and split sleeves for
excess wear, nicks, or scratches. Replace, if nec-
essary.
Inspect crankshaft rod bearings for excess wear,
nicks, or scratches. Replace, if necessary.
ASSEMBLY
IMPORTANT: Proceed slowly. Make no forced
assemblies unless a pressing operation is called
for. All internal components must be perfectly
clean and lightly coated with outboard lubricant.
IMPORTANT: Use new wrist pin retaining rings,
gaskets, seals, and O-rings during assembly.
Crankshaft
Oil the end of the crankshaft. Use Crankshaft
Bearing/Sleeve Installer, P/N 338647, and place a
new lower main bearing onto crankshaft with let-
tered side facing the tool. Install bearing until it
seats on the crankshaft.
Oil the end of the crankshaft. Place a new sleeve
in the Crankshaft Bearing/Sleeve Installer,
P/N 338647, and drive the sleeve onto the crank-
shaft until the installer contacts the lower main
bearing.
31796
24381
24377
29020
29021
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