I recently acquired a used 046. The saw needed a good cleaning up and some minor parts, but is generally in good condition. The compression feels very good, the saw starts easily, idles well and even cuts well (my brother says it cuts just as strong as his 460, both have dual port muffler covers and HD-2 filters).
The issue I have is the saw seems to be excessively 4 stroking, even with the Hi screw only 7/8 turn out.
It is far more noticeable than on my 044 or my brother's 460, and does not seem to go away until most of the 24" bar is in the cut. If you cut a 6 or 8" limb, it continues to 4 stroke the whole time. It is annoying, even though it cuts well. Both the 460 and 044 have the Hi screw adjusted more than one full turn out.
I have also removed the muffler baffle, and advanced the timing approximately 5 1/2 degrees (.020 on the key). The problem was evident before I advanced the timing, so that did not cause the problem, and the saw seems to run better with the timing advanced.
In my mind the problem has to be either carb or ignition, and since the Hi screws does not seem to be where I would expect, I suspect the carb. I tried putting the original muffler cover back on the saw but the problem did not go away and the saw just seemed anemic in the cut.
Would an improperly adjusted (or sticking) float valve in the carb cause this issue?
Any help or suggestions would be appreciated. I really like this saw, but I think it would run stronger if it were not 4 stroking so much at high RPMs.
Should I rebuild the carb, or do those aftermarket carbs work well?
The issue I have is the saw seems to be excessively 4 stroking, even with the Hi screw only 7/8 turn out.
It is far more noticeable than on my 044 or my brother's 460, and does not seem to go away until most of the 24" bar is in the cut. If you cut a 6 or 8" limb, it continues to 4 stroke the whole time. It is annoying, even though it cuts well. Both the 460 and 044 have the Hi screw adjusted more than one full turn out.
I have also removed the muffler baffle, and advanced the timing approximately 5 1/2 degrees (.020 on the key). The problem was evident before I advanced the timing, so that did not cause the problem, and the saw seems to run better with the timing advanced.
In my mind the problem has to be either carb or ignition, and since the Hi screws does not seem to be where I would expect, I suspect the carb. I tried putting the original muffler cover back on the saw but the problem did not go away and the saw just seemed anemic in the cut.
Would an improperly adjusted (or sticking) float valve in the carb cause this issue?
Any help or suggestions would be appreciated. I really like this saw, but I think it would run stronger if it were not 4 stroking so much at high RPMs.
Should I rebuild the carb, or do those aftermarket carbs work well?
