goatiemon
ArboristSite Lurker
thanks
I'll get the right one for next time
192tc bogging off idle
- Thread starter goatiemon
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I'll get the right one for next time
Same results on known good running saws or just the one in question?
goatiemon
ArboristSite Lurker
same on known good saws
(all below 120)
Well thats just not working right. Is there an adapter on the screw in end to fit a different thread?
goatiemon
ArboristSite Lurker
there are various adapters
the one I'm using seems right
(threads match the sparkplug - the o-ring compresses when l tighten it)
don't know what I could be doing wrong... this is not my first time checking compression (I'm a decent shade tree diesel mechanic)
confusing
frustrating
and l want to figure it out
but
l do have compression
because the saw runs!
l tested it today
and the fuel line swap appears to have fixed it
it starts easily, and revs up fine - no boging
thanks to everyone who helped
goat
Forget the compression tester and look for obvious flaws in parts. Sounds like the fuel line is the culprit.
goatiemon
ArboristSite Lurker
yep
fuel line is at fault
and the saw is fixed
and 'sthiltech' thanks for the pull cord comp tests - very useful as a sanity check
just want to know what the story is with the comp tester l spent 35bucks on...
goat
Adaapters do that get a testor without one. Thats why !
goatiemon
ArboristSite Lurker
the "adapter" I'm using is attached to the tool (l posted a pic earlier in the thread)
not a separate screw on piece
(there are various screw on adapters in the kit too)
so l don't know...
but it does seem like l need to try a different tester
I'll try the one l have on a car and see if it works....
next time this come up I'll get a small engine specific one l guess
thanks
goat
A tester made for small engines typically have no "quick connects" in the hose... plus the hose length is kept short for accuracy. Plus the valves in the ends themselves are made for low pressure actuation.
goatiemon
ArboristSite Lurker
thanks!
that all makes sense
goat
that all makes sense
goat
How many pulls do you think you did when testing?
It's just as much about where the check valve it too. Needs to be at the tip of the adapter. My snap-on compression testers all have the check valve at the tip of each adapter, even the bigger diesel compression tester has check valves in the injector or glow plug adapters. The newer check valves are much easier to press in then the older ones too. I suspect there was a running update to stop using standard tire valve and get ones with light springs in them. (Just an assumption) the new ones have a whitish clear sealing ring on them instead of the red or black sealing ring like the older style/tire valve.
goatiemon
ArboristSite Lurker
10-15
till it stopped rising
Yup.
