Recent content by WDC1

Gentlemen, sorry for the delay but this project lives on after a week of vacation and the second week being sick (not of the project). That said, this is where we stand. As stated for reasons I do not understand the headspace appears to be double what it should have been around thirty...

Well I have a spare Chinese cylinder kit so I'm going to give it a shot and skim the base. It will be Saturday as I'm waiting for a four jaw chuck to be delivered which will make for a better job. I'm not certain about the exhaust timing, etc. or what to look for, but the only thing I see on...

Thanks for your input but in my case, the headspace exceeded the largest available solder .635. I did take X3 sets of readings (left, right), and they were all consistent, including with and without cylinder gasket. Attached are two of the three test strips. Without the cylinder gasket the...

Has anyone performed a squish test on a HS80 (or equivalent) having good compression 110-125? .025-.030 is often cited but I am a long way from that on a new (two separate cylinder kits) AM cylinder , e.g. cylinder, piston, wrist pin, bearings. I have performed compression test using both analog...

Thanks Wonkydonkey I appreciate you taking the time to respond , everything is helpful. Also, I've got you on the AM. I've never had one not run, but some are more fecal than others.

The squish dimension came out 3X what I generally see quoted "20-30.00" which is suspect. I did not reinstall the first AM kit, but the PSI was consistent. I understand that white box kits could be the same error, but unlikely. Any other ideas? It's pretty straightforward, case bearing...

Yes, the China Cyl kits on the same engine and each producing 65-70 psi. And a very clean rebuild, nothing dodgy. I purchased the kits from different suppliers, but that doesn't always mean anything. I think at this point I'm just going to remove the cylinder gasket and see where that...

Embarrassingly enough, I'm thinking whenever this Schrader valve (SV (not the first time it came up)) is in the engine somewhere, but I now understand the referenced SV in the compression test. I have previously tested this by charging the compression test assembly with a digital (in line)...

okay I have found the straightforward procedure for squish test using solder rod in the spark plug hole 180° out on each side of the piston parallel with the piston pin. . Does anyone know what the squish dimension should be? Somewhere I heard eighteen thousand but it may be just a matter of...

I've tested it using my compressor and very accurate in-line pressure gauge but I have not tested it on another engine and will. I have a chainsaw models 029 upgraded to 039 with a fresh rebuild, I'll test it. Thanks for your input

Thanks for that I have not done the squish test that was recommended by someone else as well. I have to do a bit of research is I'm not sure how to do this test, e.g. piece of clay on top of the piston, etc., etc.. I have installed the piston the correct direction, error towards the exhaust...

I have a number of Stihl equipment that I have successfully rebuilt the engines on. The problem I'm having is a HS80 Hedger, previously rebuilt with no problems. I've recently put on a AM cylinder kit, all new gaskets, crank seals, bearings, carb.,etc. but I cannot get the engine to build over...