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Mercury 25 TwoStroke User Manual

Mercury 25 TwoStroke
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Spark Plug Inspection and Replacement
!
WARNING
Damaged spark plug boots may emit sparks that can ignite fuel vapors under
the engine cowl, resulting in serious injury or death from a fire or explosion.
To avoid damaging the spark plug boots, do not use any sharp object or
metal tool to remove the spark plug boots.
1. Remove the spark plug boots. Twist the rubber boots slightly and pull off.
26899
2. Remove the spark plugs to inspect. Replace spark plug if electrode is
worn or the insulator is rough, cracked, broken, blistered, or fouled.
26946
3. Set the spark plug gap to specification.
26947
Spark Plug
Spark plug gap 1.0 mm (0.035 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
MAINTENANCE
eng 61

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Mercury 25 TwoStroke Specifications

General IconGeneral
BrandMercury
Model25 TwoStroke
CategoryOutboard Motor
LanguageEnglish

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