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Mercury 90 Operation Maintenance Warranty Installation Manual

Mercury 90
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Inspect the carbon fiber reeds for chipping or cracks.
EVERY 300 HOURS OF OPERATION
Replace the in‑line oil filter every 300 hours of operation.
BEFORE PERIODS OF STORAGE
Refer to Storage section.
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: The engine can be stopped, or running at idle speed in neutral, when
flushing the cooling system. Do not flush the engine using a water source that
exceeds 310 kPa (45 psi).
1. Unscrew the cover from the end of the hose adapter.
2. Attach a water hose to the hose adapter.
3. Turn on the water and flush the cooling system for a minimum of three
minutes.
IMPORTANT: Do not run engine above idle speed when flushing.
4. Turn off the water and remove the water hose from the hose adapter.
Install the cover into the hose adapter.
a - Hose adapter
b - Sealing washer
c - Cover
Top Cowl Removal and Installation
REMOVAL
1. Unlock the rear latch by pushing lever up.
a
b
c
22703
MAINTENANCE
eng 77

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Mercury 90 Specifications

General IconGeneral
BrandMercury
Model90
CategoryOutboard Motor
LanguageEnglish

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