Having read all the benefits here about the muffler mods, it seems like a no brainer so I have decided to do it. But, even after reading all the posts, I'm still not clear on the carb issues. A couple folks here have mentioned doing the muffler mods then taking the saw into the dealer to have tuned. I like this idea BUT, I get the strong impression my local dealer is a stickler and I don't think he'd be too keen to hear that I modified the muffler. On top of that, I'm not even sure if this dealer is a good tuner. Of course I could ask but I suspect he isn't going to tell me if he isn't or he may just say the saw doesn't even need tuned I really don't know.
So, with that said, I may have to work on the saw myself. As mentioned in an earlier post of mine, I thought this saw was not revving as freely or cutting as well as it could. I know it'll run better with some more time but I would also assume the saw to be running too rich. If it was too rich and opening up the muffler tends to lean the saw, is it possible that if I did the muffler mods, the fuel air/mixture might be corrected or is that wishful thinking?
I used to race motocross in the 80's and though I wasn't a super star mechanic, I did do all my tuning. However, I had no fancy tachs or other such gadgets and went by engine sound and the color of the plug after running the bike wide open for a bit. If the plug was dark & oily, it was running too rich. If it was white, too lean and if tan, just right. Does tuning a saw work in the same way?
Perhaps all that is a moot point as I'm not even sure my carb offers enough adjustability for me to easily tune it. My saw has the typical LA screw but instead of having two places for the Low speed & High-speed adjustments above, I have three! There are three indentations and only one is open with an adjustment screw - the middle one. The left is labeled "H" and the right "L". The owners manual is of no help as it only shows two indentations ..or in other words, places for the "H" & "L". Does anyone know if this carb is the fixed jet model or another that I may be able to easily tune myself?
All advice, help and or ideas would be appreciated.