HELP! Husky 455

[trooney]

A neighbors son dropped off a 576 and a 455 for me to go through. The muffler rattled off the 576 and he continued to run it. That will be updated. The 455 spark plug looks good, but I gave it a new one anyway. Started it up and it idled fine and ran fine, but throttle it up and on the very high side it starts shaking like the steering wheel of a car that is way out of alignment. First time I've ever run across something like this, and I've been tinkering with saws for awhile now. He does have a 24" bar on it. First thing I thought of was maybe the crank was bent a little bit outside of the seals? Dont know. What do you guys think?

 

[cuinrearview]

Broken clutch spring/parts? Missing flywheel fins?

 

[Duce]

A neighbors son dropped off a 576 and a 455 for me to go through. The muffler rattled off the 576 and he continued to run it. That will be updated. The 455 spark plug looks good, but I gave it a new one anyway. Started it up and it idled fine and ran fine, but throttle it up and on the very high side it starts shaking like the steering wheel of a car that is way out of alignment. First time I've ever run across something like this, and I've been tinkering with saws for awhile now. He does have a 24" bar on it. First thing I thought of was maybe the crank was bent a little bit outside of the seals? Dont know. What do you guys think?

A stick between my 562’s case and fuel tank made me think that. I was thinking bear, at first.

 

[trooney]

Broken clutch spring/parts? Missing flywheel fins?

Thats an idea. Havent pulled the starter to look at the flywheel. Thanks.

A stick between my 562’s case and fuel tank made me think that. I was thinking bear, at first.

I ran it without the bar and cleaned it off before starting. No sticks anywhere.

 

[Firewood Hoarder]

Loose or damaged anti-vibe components? Maybe it hits a harmonic of some sort? Do the 455's have a limited coil?

 

[trooney]

If it was AV you think it would do it before full throttle. I dont beleive so

 

[Woodwackr]

check the motor bolts

 

[trooney]

check the motor bolts

I guess anythings a possibility on a Husky as far as bolts are concerned

 

[PA Dan]

Take the clutch cover off for your 346 and throw the rest away.

 

[drf256]

Anything vibrating that severely can’t be internal to the engine Tom. It woulda blown already.

I agree with some other rotating component as the cause.

 

[Oldbuzzard]

A stick between my 562’s case and fuel tank made me think that. I was thinking bear, at first.

Thats an idea. Havent pulled the starter to look at the flywheel. Thanks.

I ran it without the bar and cleaned it off before starting. No sticks anywhere.

Yes, if you have a bear in the saw it gets disturbed

 

[trooney]

Nope, saw clean and no fins missing. AV components there and in good shape. Still looking it over but its a 445, not a 455. My mistake.

 

[beaglebriar]

2 feet of bar seems excessive. Maybe it’s bent or pinched??

 

[trooney]

This is without the bar on. And I agree for a 40cc saw.

 

[cuinrearview]

Pop the clutch and drum off and run it, just to rule those out.

 

[hacskaroly]

Still looking it over but its a 445

If you are running a 24" bar on this, then it must have been given an upgraded 3/8" sprocket (spur or rim) at some point. Not something I would put on a 45cc saw, starting with a 50cc saw maybe. I have one of these saws and am running a 18" bar with .325 chain and it works fine with that.

If on the off chance you are running a 24" .325 bar, what is the part number, I have not been able to find one over 20".

 

[Sloughfoot]

Had a wrist pin clip come out and make one do that.

 

[Duce]

Yes, if you have a bear in the saw it gets disturbed

think I should have added an ing to that bear.

 

[redline4]

Pop the clutch and drum off and run it, just to rule those out.

This. And if the clutch is good I'd put the saw in a vice and a dial indicator on the crank.
A small imbalance becomes a much larger imbalance at 12,000 rpm.