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Mercury 150 FourStroke - Page 72

Mercury 150 FourStroke
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Description Nm lb‑in. lb‑ft
Outboard mounting locknuts and
bolts ‑ standard boat transom
75 55
Outboard mounting locknuts and
bolts ‑ metal lift plates and setback
brackets
122 90
Check corrosion control anodes. Check more frequently when used in
saltwater. See Corrosion Control Anode.
Drain and replace gearcase lubricant. See Gearcase Lubrication.
Inspect battery. See Battery Inspection.
In saltwater usage, remove spark plugs and apply a thin coating of
Anti‑Seize Compound only on the threads of the spark plugs. Reinstall
spark plugs. See Spark Plug Inspection and Replacement.
Tube Ref
No.
Description Where Used Part No.
81
Anti-Seize
Compound
Spark plug threads 92-898101385
Check wiring and connectors.
Check tightness of bolts, nuts, and other fasteners.
Check cowl seals to ensure seals are intact and not damaged.
Check internal cowl sound reduction foam (if equipped) to ensure foam is
intact and not damaged.
Check that the intake silencer (if equipped) is in place.
Check that the idle relief muffler (if equipped) is in place.
Check for loose hose clamps and rubber boots (if equipped) on the air
intake assembly.
EVERY 300 HOURS OF USE OR THREE YEARS
Check power trim fluid. See Checking Power Trim Fluid.
Replace water pump impeller (more often if overheating occurs or
reduced water pressure is noted).
1.
Lubricate the splines on the upper driveshaft.
1.
Replace alternator drive belt. See Alternator Drive Belt Inspection.
1.
BEFORE PERIODS OF STORAGE
See Storage section.
MAINTENANCE
62 eng

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