MS461 sudden death

[Martyb95]

I would like help on my MS461 magnum, 5 or 6 years old.

I had been using the saw for about an hour cutting up ash.

It was running absolutely fine then it suddenly dies like its run out of fuel but it actually hadn't.

Now it won't start at all, even after a good while. No fire whatsoever.

Any ideas what to look for first?

I still have a few ton of wood to cut up.

 

[Ryan'smilling]

Welcome to AS. First thing I'd do is pull the muffler and see what the piston looks like. Does it still turn over like normal? How does the compression feel?

 

[Martyb95]

Welcome to AS. First thing I'd do is pull the muffler and see what the piston looks like. Does it still turn over like normal? How does the compression feel?

Ok thanks I'll do that. Yes turns over like normal, although i can hear a slight squeaky noise which isn't normal.
Compression feels normal.

 

[Freudianfloyd]

Are you still getting spark?

 

[CR888]

How old was the fuel mix you were using?

 

[EchoRomeoCharlie]

Impulse line come off?

If you have good spark and good compression(test those first), this is where I would look next.

 

[farmer steve]

New plug,check/replace fuel filter and lines. Clean/ replace air filter.

 

[spladle160]

If it stopped suddenly, and feels normal when pulling it over, not easier or harder then it is most likely an ignition issue. Check for spark. If you have spark check very carefully to make sure your plug wire doesn't have any bad spots and is grounding out on the case. Check your kill switch while your at it.

 

[motorhead99999]

I agree with the ignition being the problem. I would just mail it to me to get it off your hands. Just sayin

 

[Martyb95]

I agree with the ignition being the problem. I would just mail it to me to get it off your hands. Just sayin

Its on the way to you... Thanks fpr your help

 

[Martyb95]

Thanks all for the advice
Investigation in progress...

 

[Polish hammer]

Ignition I’d suggest also same thing happened to my 461 new ignition worked great till the plug tore out of cyclinder lol

 

[spladle160]

Well, that's not what I meant by ignition, I'd say that's more of a fuel air ratio / compression issue but... yikes. That sucks.

 

[Polish hammer]

The 461 casting have had issues with the threads tearing out of course I find that out after I buy one ha