Chainsaw Repair

Husqvarna - Stihl - Poulan - Jonsered - Dolmar chainsaws and more => Cordless Battery OPE - Corded Electric => Topic started by: pleasant on June 07, 2022, 10:02:17 am

Title: Stihl MSA220
Post by: pleasant on June 07, 2022, 10:02:17 am
Hi guys. Just taken into the workshop a near new (still on original chain) Stihl MSA220 with the AP300 battery. Battery all charged up, but chain motor not going and chain not rotating when operated. I thought it was customer using it with the chainbrake activated, so de-activated it and still nothing- just a high pitched and faint electrical weeeeee sound when switches depressed. Symptoms were still as if the chainbrake was still activated, so removed the chain cover and was pretty clean under there, so removed bar and chain and tried moving clutch sprocket by hand as was pretty solid even without chainbrake on. Got it to rock back and forth a few millimeters, then tried the switch again and the sprocket jumps forward for a millisecond and stops then you get this very high pitched electrical weee sound, as if the battery is trying to do its job but the locked sprocket is preventing it in doing so. Any ideas what could be locking the sprocket with the chainbrake deactivated? Not done one before so don't want to start taking apart stuff that doesn't need to. Thanks.
Title: Re: Stihl MSA220
Post by: Cut4fun . on June 11, 2022, 09:47:26 am
Going to share on my chainsaw repair group on facebook.  Lot more folks working on these new battery saws.

I'll share answers that seem to make since for ya.
Title: Re: Stihl MSA220
Post by: Cut4fun . on June 11, 2022, 01:05:28 pm
= Is it at a dealer? Should be a warranty.
By pass the switch see if it works then. But sounds like a bad motor or broken drive gear that's grinding
Title: Re: Stihl MSA220
Post by: Cut4fun . on June 13, 2022, 07:20:29 am
@pleasant

Stihl tech says = There is no drive gear. Stihl battery tools are direct drive brushless motors. Can be lots of things...I just had an msa90 trimmer come through that the housing was rubbing the motor just enough to cause it to bind and done exact same thing...the whine is typical to a brushless stalling.
Noone outside of a dealer is going to get it fixed because of the techline support needed.... There is no real service manual, most of the diagnostic info is internal memos and experience.
Title: Re: Stihl MSA220
Post by: ray benson on June 13, 2022, 09:26:59 am

 MSA220 small service manual
https://www.mediafire.com/file/5xuz7158dd47ogr/MSA_220_sm.pdf/file
Title: Re: Stihl MSA220
Post by: pleasant on June 14, 2022, 04:22:35 pm
Thanks Ray. The manual is really helpful.

Much appreciated
Title: Re: Stihl MSA220
Post by: pleasant on June 14, 2022, 04:28:54 pm
I did forget to add, the battery is fully charged and showing 4 green full charge bars when status button on the battery is depressed off the machine. When fitted to the machine it flashes 3 red bars.