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ch80 what the threating on the spark plug size?
Posted: Fri May 30, 2014 1:20 am
by fullmetalscooter
need to do a compression test on my ch80. what the threading in inches on the spark plug etc so I can get the right adapter for my compression gauge please ? I don't want to screw up the spark plug hole using the wrong a daptor. thanks
Re: ch80 what the threating on the spark plug size?
Posted: Fri May 30, 2014 10:34 pm
by Johnniespeed
Spark plug threads were standardized long ago and all threads are metric.
The majority of spark plugs today are 14mm-1.25 , I would be surprised if yours was different.
Old Ford cars and some Rotax snowmobile engines used to use 18mm-1.25.
Some very new cars and older small motorcycles used 12mm-1.25