23
CB270
20-Hour Checkup
After first 20 hours of operation, an Authorized MerCruiser Dealer
should be contacted for the following maintenance. The boat owner
is responsible for any charges.
• Change crankcase oil and filter.
• Retorque intake manifold to
35 lb.ft. (48 N·m).
• Check all fluid levels.
• Cooling System: Inspect all hoses for damage and deterioration;
check all hose clamps for adequate tightness.
• Check carburetor adjustment.
• Inspect ignition system and timing.
• Check for loose, missing or damaged parts.
• Check shift and throttle cable adjustments, and lubricate and in-
spect for loose, damaged or missing parts.
• Steering System: Lubricate and inspect for loose, damaged or
missing parts.
• Inspect all drive belts.
• Check engine alignment. Include proper lubrication of U-joint and
splined shaft.
• Inspect Complete Engine Exhaust System (Externally) for dam-
age and deterioration; check all hose clamps for adequate tight-
ness.
• Retorque gimbal ring clamping screws to 50-55 lb. ft. (67-74 N⋅m).
• Check that both front engine mount locknuts are tightened se-
curely. Then, check to ensure that tab washers are bent down
over adjusting nuts.
• Check that rear engine mounts are torqued to
35-40 lb.ft. (47-54 N
⋅m).
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