How To Change Spark Plugs On A GL1800 

The spark plug gap should be 0.039 to 0.043 in.
Torque specs for the spark plugs AFTER seating the gasket of the plug is 13ft/lbs.
The spark plugs that were used in this video are NGK#2756 (aka BKR6E-11) and cost about $13 for all 6 plugs total.

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