Quick Compression Tester Question

[dashtz69]

When purchasing the actual tester/gauge, is there a certain size i need to buy, or are the spark plugs one size fits all??? Sorry for the stupid question, but I couldn't find it when I searched... Thanks

 

[Turbojosh]

Most - if not all - compression testers come with an adaptor so that the two most common thread types can be used. On the two different testers I have had over the years, neither has needed the adaptor. Sears has a good and cheap tester that has lasted me a few years now and does not leak.
So basically, just buy any tester - it will fit DSM's.

 

[dashtz69]

Alrighty then. thank you very much...