mercury Workshop Repair Guides

Mercury Workshop Service and Repair Manuals

Compression Check > < Engine Ignition Components - Exploded View
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Spark Plug: Service and Repair
Spark Plugs

Spark Plugs

Removal and Installation

1. Remove the ignition coils. For additional information, refer to Ignition Coil-On-Plug  See: Ignition System/Ignition Coil/Service and

Repair/Ignition Coil-On-Plug.

2. NOTICE: Only use hand tools when removing or installing the spark plugs, or damage can occur to the cylinder head or spark plug.

NOTE: Use compressed air to remove any foreign material in the spark plug well prior to removing the spark plugs.

Remove the spark plugs.

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To install, tighten to 12 Nm (106 lb-in).

3. Inspect the spark plugs. For additional information, refer to Engine.

4. To install, reverse the removal procedure.

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Adjust the spark plug gap as necessary.

Compression Check > < Engine Ignition Components - Exploded View