Mercury 9.9 User Manual

MAINTENANCE
106 eng
1. Remove the spark plug boots. Twist the rubber boots slightly
and pull off.
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2. Remove the spark plugs to inspect. Replace spark plug if
electrode is worn or the insulator is rough, cracked, broken,
blistered, or fouled.
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3. Set the spark plug gap to specification.
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Spark Plug
Spark plug gap 1.0 mm (0.040 in.)
4. Before installing spark plugs, clean off any dirt on the spark
plug seats. Install plugs finger‑tight, and then tighten 1/4 turn
or torque to specifications.
Description
Nm lb‑in. lb‑ft
Spark plug 27 20
Timing Belt Inspection
1. Inspect the timing belt and have it replaced by an authorized
dealer if any of the following conditions are found.

Mercury 9.9 Specifications

General

Brand	Mercury
Model	9.9
Category	Outboard Motor
Language	English