Newish ms 211/C hard to pull over after storage

[John Rainford]

I posted last year when I had a problem with my saw which spud and a couple of other members sorted for me. Now my brothers 2 year old saw has a problem. It has been stored for the last few months in a dry shed. Some of the time it was hanging on a hook with the blade pointing to the floor. He forgot to empty the fuel tank so the fuel has been in it for 4 months. I tried to pull it over, but no chance. The chord pulls a little and then gets stuck. I took the plug out and it pulls fine so I don't think there is an issue with the recoil. Took the muffler off to look at the piston. Looks good, no scoring. There was a lot of black carbon deposits on the muffler, much more than I would see on my saw. Could it be a stale fuel issue ? He did give me a chain to sharpen after he last used it and some of the teeth were very worn.  Any ideas will be gratefully received.

[spudulike]

Pull the plug, turn it upside down and pull it over hard to clear the fuel in the bottom of the crankcase. Ensure the ignition is off!!!

I would suspect that you are getting the piston locking due to fuel entering the engine top end.

If there is no fuel in the engine, the compression will be down to fuel in the cylinder drying leaving old oil in it making for excessive compression. This can be cleared by taking the plug out and using WD40 in the cylinder, pulling it over a few times then clearing it by pulling the engine over hard when upside down.

It will be one of the two!! 

 

 

 

[John Rainford]

Thanks Spud. I'll try what you suggested when I am at my brothers on Thursday and then post the results.

[John Rainford]

Did as you suggested. Got rid of the stale fuel, replaced it with fresh fuel, pulled the plug and turned it upside down. Pulled it over hard a dozen times, put the plug back in. First pull was a lot easier than previously. Second pull and the engine caught a little. Third pull and it fired up nicely. I ran it for a few minutes to let the fresh fuel flow through. Thanks a lot Spud, once again you have sorted an issue for me.

[spudulike]

No problem, glad it worked out, always good when it saves time and expense.

Just pass on a helping hand to others when you can as a "thank you".

Thanks for letting us know.