Does anyone know what size the hole is for a compression tester? Is it a 14 or 17mm? Something tells me it is a 14mm.[img]i/expressions/face-icon-small-confused.gif[/img]

 

I think it is 12mm. As I recall, the first letter in the spark plug model relates to the size. I think the "Bs" are 14 mm and the "Ds" are 12mm. A long while ago I bought a compression tester for my LT250R and Mojave and that is what I recall from memory - so just be sure to get a few adapters. I usually have all of mine in my toolbox, though I've only used my tester a few times, several years ago.

 

Your right BlackHawk, it is a 12mm. I just bought a compression tester with the different adapters, and it comes with 10,12, and 14mm adapters. The 10 can be used to check oil pressure.

 

Tony I have one. You want me to bring it this weekend? And as stated it is a 12mm.

 

I'll have mine with me as well. So if you need it just let me know.

 

Thanks guy's. I went out and traded a Christmas gift I received from Sears for a Complete compression testor set.[img]i/expressions/face-icon-small-happy.gif[/img]