Hi, inhereted an 044 from a buddy of mine who's too old to use it. Sat for 5 years. I rebuilt the zama carb, which made a difference but I still can't seem to get it to really run right.
Performed a pressure test to check manifold and pulse tube, which are air-tight. Didn't want to check the seals unless it was as a last resort.
I vacuum tested it and it held vacuum fairly well. Shop manual says it should hold (in psi, which I converted to inches of mercury-Hg) 11.8 Hg for 20 seconds and not rise above 8.7Hg. I vacuumed it down to 11.8Hg and after 20 seconds it was showing 10.4Hg, which is pretty good for a 20+ year old saw.
So here's my question:
I'd have to do a little more setup to do a quality pressure test with actual values, but I can measure vacuum easily. So, if a saw holds vacuum, can I assume it's holding pressure?