Question about Garden
What are the compression specs for this saw?
Posted by Anonymous on
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Posted on Jan 02, 2017
Four things I can think of:
1) There is a short in your spark plug wire. When you bend it to connect the plug in the machine it allows the exposed cable to contact the engine block. Examine the wire all the way to the coil.
2) Flywheel key is sheared ( you obviously know how to take off the flywheel since you checked the seals).
3) Flywheel air gap is not set correctly. Loosen the coil. Put the cover of a notebook or the cardboard piece of a cigarette pack between the magnetic portion of the flywheel and the coil. Tighten the coil down. This will get you the proper gap.
4) Your cylinder/piston or rings are scrubbed out. Even though it passed a compression test, on rare occasions it will loose compression only when it fires. So do the following:
Remove your exhaust manifold. Look into the cylinder with a flash light. You are looking for scratches. Anything larger then a light fingernail is definite proof you need a new cylinder/piston assy.
If it passes that test do the following:
Pour mixed fuel straight into your cylinder until 1/4 full. Slowly pull your saw over while looking into the cylinder. If you see bubbles after the ring/rings go by then you need a new cylinder/piston assy. On rare occasions if no scratches are present on the cylinder wall or piston, you may be able to change just the rings.
First if you can get a inline spark tester so you can see if your getting spark with the plug installed.
Posted on Mar 31, 2009
SOURCE: specs on 4620avx chain
Both questions are answered on page 16 here (if original chain):
Quite a few of the questions on this page apply to your undertaking.
Please take few minutes to read any that may remotely apply. A few minutes spent here may prevent the frustration of a chain that will not cut straight through teh log.
If you have more questions or need additional help please reply below and I will get back to you. HTH & Good Luck.
Thank You for using FixYa.
Posted on May 02, 2010
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