Which compression tester...

[DanS]

...for the 172?

I take it spark plugs are 16mm hex and 10mm thread, does this mean this will need an adapter?

http://www.halfords.com/webapp/wcs/...uctId_199553_langId_-1_categoryId_165557#dtab

can anyone confirm this and recommend one for same price?

 

[mark123]

I've got that one (looks like it anyway). 172 plugs are 14mm IIRC I use the gauge without the/any adapter.

 

[DanS]

oh, sounds better to me, I did a search and got the impression plugs are 16mm

might go for that one...