MS211c weird problem

[Dinosaw]

Hi Guys

211c I took in part-ex. Very little use. Turns over perfectly without the sparkplug. Replace plug and it is like pulling over a 1000cc saw. No fuel in crankcase, piston clean and smooth. Can't even pull it over properly to get a reading on compression tester. Ideas very welcome, got me stumped. TIA.

[PhillH]

Hi Guys
211c I took in part-ex. Very little use. Turns over perfectly without the sparkplug. Replace plug and it is like pulling over a 1000cc saw. No fuel in crankcase, piston clean and smooth. Can't even pull it over properly to get a reading on compression tester. Ideas very welcome, got me stumped. TIA.

Blocked exhaust? Correct plug and not too long?

[Dinosaw]

Correct plug, have removed exhaust, clean as a whistle.

[Stubby]

1 minute ago, Dinosaw said:

Correct plug, have removed exhaust, clean as a whistle.

Need a good breakfast ?

[Khriss]

Not that they make a 1000cc saw ( they should)  check coil isnt catching on flywheel, it will be something stupib like that, unless main bearings jammed / collapsed ? K

[Dinosaw]

Flywheel not catching, as I said it turns over perfectly, no strange feeling or noises, without the plug in. No excess carbon in combustion chamber. Never come across this before..

[Dinosaw]

2 hours ago, Stubby said:

Need a good breakfast ?

I had an excellent breakfast, thank you Stubby! Yesterday's was no help either!

[bmp01]

Is that the "Easy Start" model being the 'C' ? If so, it's got an extra spring between the pull cord and the crank....  I'd be looking there. Actually, I'd take that start cover off, toss it over my shoulder and reach for a standard side cover to try. 

 

[Dinosaw]

1 hour ago, bmp01 said:

Is that the "Easy Start" model being the 'C' ? If so, it's got an extra spring between the pull cord and the crank....  I'd be looking there. Actually, I'd take that start cover off, toss it over my shoulder and reach for a standard side cover to try. 

 

I was just starting to consider that possibility myself, if it is an easy start model, that's definitely not working!

[Paddy1000111]

It hasn't been fiddled with before has it? If they left the cylinder seal off the bottom then it could pump up the compression by a tonne? Could even be touching the head?