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Mercury 90 User Manual

Mercury 90
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MAINTENANCE
39
IMPORTANT: The engine must be run during flushing in order to open the thermostat and circulate water through
the water passages.
NOTE: You can have the outboard tilted or in the vertical operating position during flushing.
!
WARNING
To avoid possible injury when flushing, remove the propeller. Refer to Propeller Replacement, following.
1. Place the outboard in either the operating position (vertical) or in a tilted position.
2. Remove propeller. Refer to Propeller Replacement.
3. Thread a water hose into the rear fitting. Partially open the water tap (1/2 maximum). Do not open the water
tap all the way, as this allows a high-pressure flow of water.
IMPORTANT: Do not run engine above idle when flushing.
4. Shift outboard into neutral. Start the engine and flush the cooling system for at least 5 minutes. Keep engine
speed at idle.
5. Stop the engine. Turn off the water and remove hose. Reinstall the propeller.
ob00671
Top Cowl Removal And Installation
REMOVAL
1. Pull out the front cowl latch.
ob00672
2. Lift up the rear cowl latch. Remove the top cowl.
FOURSTROKE
ob00673
INSTALLATION
1. Lower top cowl into position over engine.
2. Push down the rear cowl latch to lock down the rear and push in the front cowl latch to lock down the front.

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Mercury 90 Specifications

General IconGeneral
BrandMercury
Model90
CategoryOutboard Motor
LanguageEnglish

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