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CA24
20-Hour Break-In Period
IMPORTANT: The first 20 hours of operation is the engine break-in period. Correct break-in is essential
to obtain minimum oil consumption and maximum engine performance. During this break-in period, the
following rules must be observed:
• Do not operate below 1500 RPM for extended periods of time for first 10 hours. Shift into gear as soon as possi-
ble after starting and advance throttle above 1500 RPM if conditions permit safe operation.
• Do not operate at one speed consistently for extended periods.
• Do not exceed 3/4 throttle during first 10 hours. During next 10 hours, occasional operation at full throttle is per-
missible (5 minutes at a time maximum).
• Avoid full throttle acceleration from IDLE speed.
• Do not operate at full throttle until engine reaches normal operating temperature.
• Frequently check crankcase oil level. Add oil if needed. It is normal for oil consumption to be high during break-in
period.
• After 20-hour break-in period, drain crankcase oil and replace oil filter (see MAINTENANCE). Fill crankcase with
correct oil (see SPECIFICATIONS).
CA211
After Break-In Period
To help extend the life of your MerCruiser power package, the following recommendations should be considered;
• Use a propeller that allows the engine to operate at or near the top of the maximum RPM range (See “Specifica-
tions” section) when at full throttle with a normal boat load.
• Operation at 3/4 throttle setting or lower is recommended. Refrain from prolonged operation at maximum (full
throttle) RPM.
CC196
20-Hour Checkup
After first 20 hours of operation, an Authorized MerCruiser Dealer should be contacted for the following mainte-
nance. The boat owner is responsible for any charges.
• Change crankcase oil and filter.
• Check all fluid levels.
• Cooling System - Inspect all hoses for damage and deterioration; check all hose clamps for adequate tightness.
• Inspect ignition system and timing.
• Check for loose, missing or damaged parts.
• Check shift and throttle cable adjustments - lubricate and inspect for loose, damaged or missing parts.
• Steering System - Lubricate and inspect for loose, damaged or missing parts.
• Inspect all drive belts.
• Check engine alignment.
• Complete Engine Exhaust System - Inspect externally for damage and deterioration; check all hose clamps for
adequate tightness.
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