i have three sthil hs56ce trimmers,one is over a year old and two are 6mo old. they all continue to serge when the warm up. when giving gas the rpms rev up and down,i have taken to a sthil dealer and they just replace the fuel filter and test it and say that they cannot duplicate failure,i dont know if there is a carb issue or what or its just a bad model, i e-mail sthil about problem they havent got back to me, does any one have any suggestions? i have an echo,tanaka and kawasaki trimmer and they run fine ,should i put an ethanol stabilizer in them,why are they so touchy? when my other equipment runs fine on the oil/fuel mixture blowers,pole saws and line trimmers ect...
#2
BKBrown
Are you using non-ethanol gas or putting ethanol stabilizer in it ? Is your fuel / oil mixture right ?
Ethanol in gas can make a big difference in the way small engines run.
If your dealer has no solution - their mechanic isn't worth much (just my opinion) !
#3
exotion
If all three are doing it I am thinking fuel mix. Also I agree with above a good mechanic could fix
i get my gas at circle-k, should i use a fuel stabilizer?these are the only equipment i have that are problems,my tanaka,echo,and kawasaki trimmers along withe my blowers and lintrimmers run fine with my mixture,
#5
BKBrown
Fuel stabilizer will not hurt anything and may solve some problems. The Stihl uses 50/1 fuel and may not run too well on mix with more oil in it.
