zeroskater58
ArboristSite Lurker
hey guys, new to the forum, been learning a lot reading all of everyones posts, just cant seem to find the info im looking for....maybe i havent dug enough. i want to prefeace by saying i am new to this, but very mechanically inclined....so i picked up an ms660, intention is to mill some timber on my homestead, used that had a scored piston and cylinder, looked like it had been run lean. still started and ran for the time it was demoed. i replaced the cylinder and piston with a big bore kit from ebay that was used and said to have low hours, figured sure since it should already be broken in. i opened up the outlet on the muffler as well. i have the service manual for the saw and followed the directions to replace the piston and cylinder. it started just fine after the replacement, but wouldnt idle right. i get it to a place where it sounds right, and holds idle when i tip it on its side as well, but if i leave it alone, the idle will slowly go down, and the saw will die. if i give it a little gas it will sometimes race after letting the throttle off and the chain will keep spinning. i say sometimes because sometimes it would settle to idle just fine. i know that the decompression valve is leaking, have a new one on the way. when i looked in the fuel tank there was a little saw dust, but the filter visually looked fine. would a bad fuel filter do this? it just seems like the saw slowly gets less and less gas at idle and dies, but the there are times it seems to randomly go lean and race. always starts back up just fine when it dies. havent checked the impulse line at this point. any suggestions on where i should turn my attention? as another note. there is no play in the crank that i can feel.
on another not, the bar oil at full throttle seems to not get to the bar, but comes out of the clutch cover, thinking the pump has a bad seal, am i on the right track? thanks for all your help and advice!
-danny
on another not, the bar oil at full throttle seems to not get to the bar, but comes out of the clutch cover, thinking the pump has a bad seal, am i on the right track? thanks for all your help and advice!
-danny