Operating In Freezing Temperatures; Operating In Saltwater Or Polluted Water - Mercury 40 jet fourstroke User Manual

It is illegal to operate a boat while under the influence of
alcohol or drugs.
Know the waters and area you will be boating; tides,
currents, sand bars, rocks, and other hazards.
Make inspection checks listed in Maintenance ‑ Inspection
and Maintenance Schedule.
Check steering for free operation.
Check for debris around the rudder and reverse gate which
may jam or hinder operation.
Before launching, examine the jet drive water intake for
obstructions which may prevent pumping of water.
Ensure the driveshaft bearing on the jet drive is lubricated.

Operating in Freezing Temperatures

If there is a chance of ice forming on the water, the jet drive
should be removed and drained completely of water. If ice
should form at the water level inside the outboard driveshaft
housing, it will block water flow to the engine causing possible
damage. Do not start the engine until the ice is clear.

Operating in Saltwater or Polluted Water

If the boat is kept moored in the water, always tilt the outboard
so the water intake is completely out of the water (except in
freezing temperatures) when not in use.
Wash down the outboard exterior and flush out the exhaust
outlet of the jet drive with fresh water after each use. Each
month, spray Mercury Precision or Quicksilver Corrosion Guard
on external metal surfaces.
NOTE: Do not spray on corrosion control anodes as this will
reduce the effectiveness of the anodes.
OPERATION
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