one cylinder fouling plug, other is clean

dthrckt

Petty Officer 2nd Class
Joined
Apr 27, 2009
Messages
105
1957 bigtwin runs well - top cylinder fouling the plug (black) but bottom is fine - swapped plugs, same result.

could it be the plug cable? is there anyway to test a cable (I've got several to choose from).

time to get a compression tester. bought one and couldn't figure out why both cylinders read 60 so i returned it. then i realized i never unhooked the compression relief arm :rolleyes:
 

kenmyfam

Supreme Mariner
Joined
Aug 10, 2006
Messages
14,392
Re: one cylinder fouling plug, other is clean

Need to get a proper compression reading. Could be just a head gasket.
 
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