Compression should be quite a bit higher than 90. Homelite Shop Service Manual's state that at 90 it's time for some work. Have you pulled the muffler and looked at that side of the piston? Are you sure your compression gauge is accurate? Is it a screw in gauge?
Ok I put good carb back on saw, Checked piston thru exhaust Dark in color at top, probably running too rich or something, The rest of the piston looks decent for the age. No signs of scalding or groves. Because the rest of the saw was apart, I just used my cordless drill with socket and from pull cord side used drill to rotate cam. It started out with a quick 30# then as I kept the revolutions going it climbed to a 120# thats where it held. it actually held compression for a couple min. did'nt wait to see how long it would hold. Any ideas need to get running up to snuff soon Thanks Dave
It held compression? Did you release the valve on the gauge? It should be fine. The maximum compression reading is somewhat dependent on how fast the engine is spun around and did you lock the trigger open? I'd put it together and run it...
I released the valve to put the spark plug back in I have an identical sister to this saw. I tested it pulling by hand on pull cord and it read 120# also They both have been used about the same amount. I bought these many many years ago and have used them religiously , Generally about 14- 17 cords of wood each year. They don't seem to be as agressive as they used to be And I thought maybe it was the compression. What are your thoughts
Post by tribulation138 on Jul 27, 2011 21:37:29 GMT -5
make sure chain is sharpened... tune carb for max power. To rich on high speed needle will bog the engine at full throttle. Just dont make it to lean.
the xl-12 is great saw at 54cc's. But remember its only a light duty saw. I know xl-12 series saw run decent at 120-150psi. But 120 is just alittle bit to low for me IMO. I like my saws to run at 165-190psi. The result is the saw cuts bigger, faster, and just torquier.
Tribulation, Thanks For The Tip I belive I am going to re-ring the saws And hopefully boost compression. I have a Super 1050 and boy you talk about compression. If you aren't careful and don't have a good hold on pull cord it will hurt you. Again thanks