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Mercury 300R HD CMS Mechanical - 300 R HD Models Maintenance Schedule Decal

Mercury 300R HD CMS Mechanical
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Check cowl seals to ensure seals are intact and not damaged.
Check that the intake silencer is in place, if equipped.
Check that the idle relief muffler is in place, if equipped.
Check for loose hose clamps and rubber boots on the air intake
assembly, if equipped.
EVERY 300 HOURS OF USE OR THREE YEARS
Check power trim fluid. Refer to Checking Power Trim Fluid.
Lubricate all lubrication points. Lubricate more frequently when used in
saltwater. Refer to Lubrication Points.
Replace water pump impeller—dealer service.
1.
Lubricate the splines on the upper driveshaft—dealer service.
Check wiring and connectors—dealer service.
Replace alternator drive belt. Refer to Alternator Drive Belt—dealer
service.
Replace the spark plugs.
Inspect the trim thrust guide wear pads.
BEFORE PERIODS OF STORAGE
Refer to Storage section.
300R HD Models Maintenance Schedule Decal
65585
1. Replace the water pump impeller more often if overheating occurs or reduced water pressure is noted.
MAINTENANCE
eng 51

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