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The 1991 Mercury Marquis spark plug gap is .034. Most spark plugs will be pre-gapped by the spark plug manufacturer.
#1 is about 2 to 3 O'clock firing counter clockwise 1342.
what is the setting of the spark plug gap for a 1991 chev caprice .035
The 1991 Suzuki 250 dirt bike spark plug gap is .019. Most spark plugs will come pre-gapped from the spark plug manufacturer.
if the oil is at the spark plug base the valve cover gasket is leaking. if the spark plug electrode is covered with oil the engine needs rings
The 1991 350 cubic and Chevrolet engine spark plug gap is .027. Most spark plugs will come pre-gapped from the manufacturer.
You have an oil leak
The spark plug gap for a 1991 Chevy Silverado 2500 V8-350 is .035, according to major spark plug manufacturers (i.e. Autolite, Bosch, Denso, NGK).
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1991 Jeep Cherokee 2WD 4.0L MFI 6cylThe Spark Plug Gap.035 (In thousandths of an inch)
SPARK PLUG GAP1991 Nissan/Datsun Truck Pathfinder 2WD 3.0L FI 6cylThe Spark Plug Gap.032 (In thousandths of an inch)
Sparks plugs are replaced by disconnecting the battery, removing the spark plug cable and boot, and by removing the old spark plug. Next put in the new spark plug, attach the boot and cable and reconnect the battery.