Husky 346 NE Echo 501

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Husqvarna 550 MKII. They have updated the crank bearings once again. Was awhile back this year. Just getting around to updating in places. So look for the SB.

MKII still having failures.

Posted by a tech - Bearings are QVW now no longer SDK per bulletin.
 

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Husqvarna 550 MKII. They have updated the crank bearings once again. Was awhile back this year. Just getting around to updating in places. So look for the SB.

MKII still having failures.

Posted by a tech - Bearings are QVW now no longer SDK per bulletin.

That's really disappointing to hear. Any word on the 562s, as well?

I'll have to check the serial on my 550xpg. Still unfueled, so maybe I'll send it down the road.
 
That's really disappointing to hear. Any word on the 562s, as well?

I'll have to check the serial on my 550xpg. Still unfueled, so maybe I'll send it down the road.
I still blame 50:1.

Run good FD oil and at least 40:1. Folks running at least that I dont hear or read about issues.
 
I still blame 50:1.

Run good FD oil and at least 40:1. Folks running at least that I dont hear or read about issues.
Yea, that's what everyone says. Some suggest even going higher oil at 32:1 for the x-torques and 5-series.

I switched to 40:1 after my 562 ate it's bearings in 2023. It was a hard use saw that was mostly bucking firewood, but always kept clean with chains/bar in good order and only made it to 600 hours or a little more.
 
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