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Mercury 305 CID - Spark Plug Wires

Mercury 305 CID
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THUNDERBOLT IV AND V IGNITION SYSTEM - 4B-2390-823225--1 1096
Spark Plug Wires
1. Inspect spark plugs for damage.
2. Check spark plugs for continuity using Multi-
Meter / DVA (91-99750) or similar.
3. Replace any wires that are cracked, cut, or have
damaged spark plug boots.
4. Replace any wires that do not show continuity
from end to end.
5. Reinstall wires in proper order. Observe the fol-
lowing:
IMPORTANT: Proper positioning in spark plug
wire supports is important to prevent cross-
firing.
IMPORTANT: Before installing coil wire to coil,
apply approximately 1/2 oz. of insulating com-
pound around top of coil lead tower. Force nipple
into coil and wipe off excess. Make sure boot
does not “hydraulically back off” the distributor
cap terminal.

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