That gauge is for the smaller engines, which is likely for your engine, and to be honest, never really bothered with the thing. It is I guess a go/no-go gauge, if it goes in the hole, you should install a new guide.
I am going to pass on doing a valve guide here....
It is a neat kit though....
Many thanks to both of you, it's close to what I read on other forum.
So the valve guide is really in perfect shape, just a few scoring on the exhaust valve stem (I already sand/polished it - this remove protruding material, even if it wont fill the missing material...).
Now waiting valve lapping tool (can be long...) and I find someone that can give me a little bit of lapping paste/compound.
No major progress these days... but lot of other things to do - and no hurry - this is is side project :wink:
Was able to borrow a valve lapping set, with fine paste and asmall suction cup that just fit on my small briggs valves !
So do a quick lapping, ring is not a the same place on exhaust and intake... more inside on exhaust valve and more outside on intake valve. But they are both continuous nice rings so it should be fine ?