HUSQVARNA 455 Rancher No Start-Baby Dead

[Yerta]

Newby and thanks for allowing me to join. I have a 455 Rancher that I was using and just as I finished cutting thru log it died and will not start. I have checked for spark it's good, new plug and flywheel key is good, checked gap for coil seems fine, poured gas in spark hole and still nothing. Removed muffler and it looks fine not clogged. I've done all I know. Compression seems same just pulling cord. Assistance appreciated.

 

[RED-85-Z51]

Id almost think a sudden loss of crankcase pressure/vacuum...like a blown out crank seal

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[rupedoggy]

With the muffler off look for "bar code" on the piston

 

[Stateline Sawer]

Cooked piston

 

[Gord404]

Cooked piston

Sometimes they feel like nothing has changed but removing the muffler and taking a look will save a lot of time pinpointing the problem.

 

[grizz55chev]

Newby and thanks for allowing me to join. I have a 455 Rancher that I was using and just as I finished cutting thru log it died and will not start. I have checked for spark it's good, new plug and flywheel key is good, checked gap for coil seems fine, poured gas in spark hole and still nothing. Removed muffler and it looks fine not clogged. I've done all I know. Compression seems same just pulling cord. Assistance appreciated.

Flooded, give it a rest and try without the choke, wide open throttle.

 

[Stateline Sawer]

Flood

Flooded, give it a rest and try without the choke, wide open throttle.

Flooded during a cut? I doubt it. How did it sound just before it cut out? Did it sound lean?

 

[grizz55chev]

Yep, missed that part.