Flushing The Cooling System; Top Cowl Removal And Installation - Mercury 135 Pro XS OptiMax Manual

Flushing the Cooling System

Flush the internal water passages of the outboard with fresh
water after each use in salt, polluted, or muddy water. This will
help prevent a buildup of deposits from clogging the internal
water passages.
NOTE: Engine can be stopped, or running at idle speed, when
flushing the cooling system. Do not flush the engine using a
water system that exceeds 310.26 kPa (45 psi).
1. Remove the plug from the fitting in the bottom cowl.
2. Attach a water hose to the fitting. Turn on the water and
flush for 3–5 minutes.

Top Cowl Removal and Installation

REMOVAL
1. Pull out the front cowl latch.
MAINTENANCE
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