Mercury Bravo Three Operation & Maintenance Manual page 25

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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