If weight is unsmoothly moving, replace.
2. Measure camshaft lobe diameter○
a
and height ○
b
. If out of specification, replace it.
○
a
Intake camshaft: 21.950～22.050mm
Exhaust camshaft: 21.950～22.050mm
○
b
Intake camshaft: 26.736～26.836mm
Exhaust camshaft: 26.532～26.623mm
3. Measure camshaft diameter. If out of specification, replace the camshaft.
Camshaft journal wear limit: 14.934mm
Crankshaft
Measure crankshaft runout. If out of specification, replace.
Crankshaft runout limit: 0.03mm
Oil clearance
1. Put a piece of plastic space gauge on to the crankpin in parallel to the crankshaft.
2. Assemble the connecting rod to the crankpin.
3. Tighten the connecting rod bolts to the specified torque.
Tightening torque: 12Nm
4. Remove the connecting rod, measure the compressed width of the plastic space gauge. If out
of specification, replace the connecting rod.
Oil clearance: 0.020～0.052mm
Note:
Don’t rotate the connecting rod before completing measurement.
Valve lifter
1. Inspect valve lifter for wear or damage. Replace if necessary.
2. Measure valve lifter outside diameter. If out of specification, replace the valve lifter.
Valve lifter outside diameter: 7.9650mm
Oil splash gear
b
a
Inspect oil splash gear unit, if slow-moving/wear/damage/crack, replace.
Crankshaft bearing
Inspect bearing, if pitting/rumbling, replace.
55
https://www.boat-manuals.com/
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