If you keep your boat moored in the water, always tilt the outboard so the
gearcase is completely out of water (except in freezing temperatures) when not
in use.
Wash the outboard exterior and flush out the exhaust outlet of the propeller and
gearcase with fresh water after each use. Each month, spray Mercury Precision
or Quicksilver Corrosion Guard on external metal surfaces. Do not spray on
corrosion control anodes as this will reduce the effectiveness of the anodes.
Operating at High Elevations
Your engine automatically compensates for high elevation changes. A different
pitch propeller may help reduce some normal performance loss resulting from
reduced oxygen in the air. Consult your dealer.
Setting Trim Angle While Running Engine at Idle Speed
The exhaust relief hole on the outboard may become submerged if the
outboard is trimmed full‑in while running at idle speed. This will cause exhaust
restriction, rough idle, excessive smoke, and fouled spark plugs. If this
condition exists, trim the outboard up until the exhaust relief hole is out of the
water. The outboard should be lowered for accelerating from a standing start or
from idle speed.
28423
Engine Break‑in
IMPORTANT: Failure to follow the engine break‑in procedures can result in
poor performance throughout the life of the engine and can cause engine
damage. Always follow break‑in procedures.
Break
‑
in Procedure
Vary throttle settings during break
‑
in. Use the following suggestions.
First Hour
•
Allow the engine to warm‑up for 30–60 seconds.
OPERATION
60
eng