So a couple weeks ago I got my bar on my 260 pinched in a branch and like an idiot I tried to work it free instead of just getting another saw in cutting it free. well after I got it out it wouldn’t start. Thanks put it away and got another saw to finish working. Now I got the 260 on the bench. It starts, reaves real fast then dies like it’s not getting enough fuel. Try to retune no luck. Take carb off check fuel filter and fuel lines, all good. Clean carb, check muffler screen, new spark plug, all good. Put back together starts right up. The tune is a little off so I adjust the carb and saw dies. Now it starts reaves fast and dies again! Try to adjust the carb and no luck! appreciate any help!
I'd try a new fuel filter. You stated the fuel line was checked but did you run something through it to be sure there is no obstruction? Maybe change the line too.
You most likely tore your intake boot ,or impulse hose pulling on the handle . The saw is running lean due to either an air leak in the inlet tract ,or lack of fuel due to the carb pump not supplying enough fuel . Don’t continue to run it .
Sounds very coincidental with a pinched bar. Will it idle at all if you leave the choke engaged? Sounds very much like an air leak. Could be the intake boot got stressed while you were trying free the saw. The MS280 have a bad rap for being real hindgy at the AVs, leaving the boot to pickup some of the load between the tank/handle and the case. Not sure if it’s similar on the MS260 I guess I was typing while Nixon was submitting Probably a good bet it’s there at the intake
Thanks Nixon , and M2theB , that was my best guess, but I’ve never messed with the intake boot or the impulse line. Any suggestions or directions on how to check that and change it?
Check it by running a compression test. You’ll need a test set and block off the intake and exhaust. It would be just as quick if not quicker to replace the boot and the line. To replace You need to undress it until you’ve got good enough access to remove and replace Pull covers, air filter, carb, internal ring on the intake. I pull the recoil and the handle too. Should be a metal clamp to unscrew at the cylinder intake. Impulse comes off a nipple on the case I think. Remove both and replace and go backwards from the tear down. It’s tight quarters, so be patient. Take pictures on tear down.
You’ll need to remove it he tank handle to check the boot. I’d bet it’s either that or you pulled the impulse hose off the case, which is right below the boot. You can inspect both with the handle removed
Thanks guys. Took saw apart as described, except I didn’t take the intake off ( would have been easier) I got to the impulse line and Cleaned with carb cleaner and put back on. It was real tight, but was able to get in there with a needle nose. Put back together and BAM!! Started right up. Adjusted carb and good to go. Going to get in wood Wednesday and fine tune! You guys saved me $$$ couldn’t have done it without your help!!
Great to hear ! Going to make a suggestion . Buy an OEM impulse hose . The one on the saw is no longer flexible, probably from heat . . It’ll make a decent project for a snow day .
