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Mercury 90 Operation Maintenance Warranty Installation Manual

Mercury 90
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c. If an adjustment is necessary, do not pry or apply any force on the
center electrode. This is critical with any type of spark plug that has a
wear surface, such as platinum or iridium added to either the ground
electrode or the center electrode.
d. When it is necessary to widen the gap, use a tool that only pulls back
on the ground electrode without touching the center electrode, the
porcelain, or the wear portion of the ground electrode.
e. When it is necessary to close the gap, gently tap the plug ground
electrode on a hard surface.
4. Before installing spark plugs, clean off any dirt on the spark plug seats.
Install the plugs finger‑tight and then tighten an additional 1/4 turn or
tighten to the specified torque.
Description
Nm lb‑in. lb‑ft
Spark plug 27 20
Compressor Air Intake Filter
The filter should be changed every 100 hours of operation, or once a season.
IMPORTANT: Never run the engine without the air filter.
REMOVAL
1. Remove the three screws and filter cover from the engine.
2. Remove the filter from the cover.
a - Cover
b - Filter
INSTALLATION
1. Install the filter into cover.
2. Fasten the filter cover with three screws.
a
b
29476
MAINTENANCE
94 eng

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Mercury 90 Specifications

General IconGeneral
BrandMercury
Model90
CategoryOutboard Motor
LanguageEnglish

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