I have a Stihl chainsaw, model MS310, 59 cc engine, that I bought new five
years ago. I cut down 6 or 7 trees each year and saw them into firewood len
gths. Other than an occasional fallen limb after a storm, that's all the us
e it gets.
A couple of weeks ago, I felled a couple of trees and started sawing them i
nto logs. About halfway through the second tree, I shut off the saw to move
some limbs or logs from underfoot. When I tried to start it again, it woul
dn't start; felt like there was little or no compression when I pulled the
Last weekend, I went out and cut down four trees without any saw problems,
it restarted easily when hot.
Today, I went out to saw up the trees from last weekend. After cutting the
first tree into logs, I went over to the second tree and the saw wouldn't r
estart. Again, it felt like there was no compression; there had been normal
compression resistance when I first started it. I checked the fuel and bar
oil tanks and they were both about half full.
Any ideas what this could be caused by? I checked the spark arrester screen
and it was clean. Air filter is clean and new. Spark plug is ok, fuel/oil
mix is what I've been using all along. I have several chains and keep them
well sharpened, rotating the use among them, so the engine isn't being stra
ined by a dull blade. I couldn't find any internal areas packed with sawdus
t which would cause the engine to overheat.
Any ideas of what else to try before taking it into the shop?