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Mercury 300R HD CMS Mechanical User Manual

Mercury 300R HD CMS Mechanical
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IMPORTANT: If no water is coming out of the water pump indicator hole, stop
the engine and check the cooling water intake for obstruction. No obstruction
may indicate a water pump failure or blockage in the cooling system. These
conditions will cause the engine to overheat. Have the outboard checked by
your dealer. Operating the engine while overheated will cause engine damage.
WARMING UP ENGINE
Before beginning operation, allow the engine to warm up at idling speed for
three minutes.
Gear Shifting
IMPORTANT: Observe the following:
Never shift the outboard into or out of gear unless the engine speed
is at idle. Shifting at higher than engine idle speed could cause
damage to the gearcase.
Do not shift the outboard into reverse when the forward motion of
the boat is greater than a no wake speed. Shifting into reverse at
higher boat speeds could cause the engine to stall, and in some
situations, this could cause water to be drawn into the cylinders,
resulting in severe engine damage.
Do not shift the outboard into reverse when the engine is not
running. Damage to the shift linkage could occur.
The outboard has three gear shift positions: forward (F), neutral (N), and
reverse (R).
When shifting, always stop at the neutral position and allow the engine
idle speed to stabilize before shifting into another gear.
Always shift the outboard into gear with a quick motion.
After shifting the outboard into gear, advance the lever further to increase
speed.
N
RF
58239
OPERATION
44 eng

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Mercury 300R HD CMS Mechanical Specifications

General IconGeneral
BrandMercury
Model300R HD CMS Mechanical
CategoryOutboard Motor
LanguageEnglish

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