NWnewguy
ArboristSite Operative
Sorry to start sucha thread, but after searching for awhile I couldn't find anything explaining the difference. Is there really anything substantial?
Yeah but open the muffler on the 44.7 and... :love1:
Thanks Andy
Erik how big did you go? I have the 260pro and have a fair number of hours on it and think it is time too do surgery on this poor abused thing :jester: mine is a cutin fool just want wake it up a bit
thanks mate
I went to 85% of the exhaust port at the piston. I used a carbide bit on my dremal to open the existing hole to a square hole at 85% and removed the screen. Can't remember the exact numbers but I want to say it’s a ½” X not quite a 1” (.85") hole. Stihl has cast a pretty good template in the cover from the factory. The screen will restrict about 40% of the exhaust flow so if you need to leave the screen you will need to compensate for that. It took about 20 minutes (literally no WoJo needed) to complete the mod and it made a world of difference. Just make sure you clean out all of the filings (wash with water don't rely on air to blow it all out) and remember to reset the carb when you are done. Good luck
I went to 85% of the exhaust port at the piston. I used a carbide bit on my dremal to open the existing hole to a square hole at 85% and removed the screen. Can't remember the exact numbers but I want to say it’s a ½” X not quite a 1” (.85") hole. Stihl has cast a pretty good template in the cover from the factory. The screen will restrict about 40% of the exhaust flow so if you need to leave the screen you will need to compensate for that. It took about 20 minutes (literally no WoJo needed) to complete the mod and it made a world of difference. Just make sure you clean out all of the filings (wash with water don't rely on air to blow it all out) and remember to reset the carb when you are done. Good luck
I also did the muffler mod on my 026. However it tends to lean out the saw and the intellicarb has a fixed high speed jet. (at least on my 026). I used a number size micro drill bit to determine the size of the existing jet and then increased it to the next size larger. (I don't remember the exact size). You don't need to use a drill. A hand held micro drill bit vise works great.
You can also try and find the older style adjustable carb. I tried both carbs and actually like the fixed jet carb better. The old style carb seemed to be overly sensitive. With the right jetting, the fixed jet carb is better IMHO.
I also did the muffler mod on my 026. However it tends to lean out the saw and the intellicarb has a fixed high speed jet. (at least on my 026). I used a number size micro drill bit to determine the size of the existing jet and then increased it to the next size larger. (I don't remember the exact size). You don't need to use a drill. A hand held micro drill bit vise works great.
You can also try and find the older style adjustable carb. I tried both carbs and actually like the fixed jet carb better. The old style carb seemed to be overly sensitive. With the right jetting, the fixed jet carb is better IMHO.
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