MS211c weird problem

[Paddy1000111]

11 hours ago, Dinosaw said:

Hi Steve, First thing I did, absolutely clear, nothing there. As I said earlier, pulls over fine with no plug in. With plug in it will still turn over but with a great deal of difficulty. Ridiculous on such a small saw. Thanks for your two pennorth!

Guess it's time to do what others have said and look at the pull start and it's bushings. Maybe when it's loaded it's jamming up? 

[spudulike]

Saws that have been run on an oil heavy fuel mix when left standing evaporate all the fuel from the cylinder bore leaving oil. This can REALLY seal a healthy engine. You may have this phenomena. A few squirts of WD40/GT85 down the plug hole and pulling it over hard a few times will help dissipate it and then try it again.

I can't help but think it is this.

The only other thing left is something has come loose and is catching between the flywheel/clutch and the casing/engine but would have thought that this would also happen with the plug out as well.

The last thing to note is as you pull the starter, is the engine jamming up as the piston comes up past the exhaust port to create secondary compression or is it random or another part of the cycle? This can help a diagnosis.

[Dinosaw]

16 minutes ago, spudulike said:

Saws that have been run on an oil heavy fuel mix when left standing evaporate all the fuel from the cylinder bore leaving oil. This can REALLY seal a healthy engine. You may have this phenomena. A few squirts of WD40/GT85 down the plug hole and pulling it over hard a few times will help dissipate it and then try it again.

I can't help but think it is this.

The only other thing left is something has come loose and is catching between the flywheel/clutch and the casing/engine but would have thought that this would also happen with the plug out as well.

The last thing to note is as you pull the starter, is the engine jamming up as the piston comes up past the exhaust port to create secondary compression or is it random or another part of the cycle? This can help a diagnosis.

Definitely gets tighter as it passes the exhaust port. I thought that somehow some chain oil had got into the crankcase but it's been upside down for 24 hours and not a single drip. Going to dismantle it this afternoon.

[bmp01]

4 hours ago, Dinosaw said:

Definitely gets tighter as it passes the exhaust port. I thought that somehow some chain oil had got into the crankcase but it's been upside down for 24 hours and not a single drip. Going to dismantle it this afternoon.

Be interesting to see what's up with it. 

Still got my money on the easy start mechanism.  If it was working properly it effectively decouples the engine from the pull start - all you are doing with the pull start is winding up a biggish clock spring, so you don't feel the compression stroke. I bet it broke and has been bodged somewhere along the lines . ...

Google ergostart for utube vids demonstrating the easy start.

Edited September 27, 2020 by bmp01
Google note added

[spudulike]

I would do what I suggested first, probably just a build up of congealed oil!

[bmp01]

On 27/09/2020 at 10:11, Dinosaw said:

 Going to dismantle it this afternoon.

Find anything out of the ordinary ?

[Dinosaw]

21 hours ago, bmp01 said:

Find anything out of the ordinary ?

Was a bit busy. Have stripped it but not removed barrel yet. I hate clamshell saws! I'll let you know what I find upon the morrow!

[Dinosaw]

On 27/09/2020 at 09:52, spudulike said:

Saws that have been run on an oil heavy fuel mix when left standing evaporate all the fuel from the cylinder bore leaving oil. This can REALLY seal a healthy engine. You may have this phenomena. A few squirts of WD40/GT85 down the plug hole and pulling it over hard a few times will help dissipate it and then try it again.

I can't help but think it is this.

The only other thing left is something has come loose and is catching between the flywheel/clutch and the casing/engine but would have thought that this would also happen with the plug out as well.

The last thing to note is as you pull the starter, is the engine jamming up as the piston comes up past the exhaust port to create secondary compression or is it random or another part of the cycle? This can help a diagnosis.

Hi Guys, Episode 2: Have taken saw apart to find crankcase absolutely clean, no dodgy bearing, nothing loose or any gooey cack  anywhere. Saw has standard 211 starter without easy start even though it says it's a 211c on the label. Combustion chamber also v. clean. How do you get the old joint sealant off? Beginning to think that Stubby's breakfast advice is worth listening to.....

Edited October 4, 2020 by Dinosaw
Forgot something.

[Stubby]

3 hours ago, Dinosaw said:

Hi Guys, Episode 2: Have taken saw apart to find crankcase absolutely clean, no dodgy bearing, nothing loose or any gooey cack  anywhere. Saw has standard 211 starter without easy start even though it says it's a 211c on the label. Combustion chamber also v. clean. How do you get the old joint sealant off? Beginning to think that Stubby's breakfast advice is worth listening to.....

Does the chain go round when you pull it over ?  Wonder if its a rusted up clutch bearing ???

[bmp01]

38 minutes ago, Stubby said:

Does the chain go round when you pull it over ?  Wonder if its a rusted up clutch bearing ???

But it pulls over OK without the plug in. .... that's where it gets confusing.