Finally got all moved into our new house and got a chance to mod the muffler on my 346XP. Put a 1/2 hole in the bar side of the muffler and dressed it up with a deflector off of a 288XP, looks pretty clean and professional. Shaved off the H needle limiter with a razor blade just in case it was outside of factory limit. Initial idle after it came off fast idle and warmed up was 3700-3750!!! Seems a bit high but the chain wasn't moving. Backed down the T screw to 2700 per owners manual and adjusted the L jet for best accel and consistant idle if saw is layed over on it's side or sitting on angle. Then came the high end. Clamped the bar into a bench vise and let her warm up with a few blips of the throttle, first WOT was 11500, huh, not very fast. Twisted the H jet and slowly leaned it out little by little until I got 14250 and still no limiter kicking in. This was faster than I would like so I backed it down to 13800-13900, sounds mean and fast as hell. I also got the tell tale four-stroking at this speed, definitely not hitting the limiter that I was much worried about. Overall I am shocked at how undertuned this saw was out of the box. The plug was very wet and oily to begin with, now nice amber brown. Very happy with the mod and the results. Gonna put her in wood tonight if all goes well. Still don't have enough tanks of petrol through the 372XP to mod it but someday it will receive the same treatment. Got an extra 288XP deflector and screen for when she's ready.
Scott
Scott
