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Update... The issue was directly associated with the coil. I ordered a used one and installed it this evening. The unit started up and ran as it should. An interesting observation or lack thereof, regarding minimal spark production, was intriguing. I totally anticipated seeing a spark jump...

It was highly unlikely that anything had built a nest in the muffler since the unit was stored in my enclosed truck bed. I did open up the muffler and closely inspected it to be 100% certain. There is nothing inside the muffler. I had also inspected the exhaust port during my initial tear down...

Harley, The screen was removed quite some time ago. I have the entire screw-in exhaust nozzle pulled. Yes, I have the same muffler that you shared the picture of. The sound does seem to emanate from the intake side when the butterfly opens. I'll read through the repair manual to determine if...

Good afternoon! I have been trouble shooting my blower for quite some time. I know this type of issue typically is related to a plugged muffler screen. However, this unit does not have one installed. I vacuum and pressure tested the fuel tank, lines, as well as the crankcase and cylinder. I...

Hello, This is a pretty solid kit to begin with. I am of the opinion that utilizing the latest technology is the way to go. However, you always benefit more from having a deeper fundamental knowledge base in regard to tieing prussic. Prussic not only apply to friction hitches in your climbing...

Thanks for the positive feedback Wood Doctor. I had my doubts along the way, but thankfully it all worked out in the end.

That is a good question. I already pitched the old cracked crankcase so I have no way to verify your concern at this point. Just as an FYI, I ordered part number 1144-020-2911 and it came with the bearing and all the necessary pins/studs pre-installed. It also came with a new seal too. While at...

Hey guys, Thought I’d post an update that the saw has been returned to its original functional state. There were no issues replacing the clutch side of the crankcase. Everything lined up perfectly. I used a Hyway 56mm cylinder and piston kit as a substitute for the more expensive OEM version...

Thanks for the alternative suggestions. I’m keeping the saw and moving forward with the rebuild. It has been torn down to the crankcase and all parts have been cleaned and inspected. I have a parts list that needs to be ordered once I find time to stop in at the dealer. This includes a clutch...

I tend to look for honesty and the good in people. However, in situations like this I I is hard to do so. I cannot imagine how this saw could have been considered as a running unit.

Andy, The seller conceeded more money off the price of the saw so that I do not have to return it. At this point I only have $360 ($310 + 50 in shipping) in this parts saw. It is worth more than that if I parted it out myself. The rest of the unit looks fairly new. I had purchased some used...

Good afternoon! The saw arrived and I had a chance to open it up and inspect the power head. I found that the clutch side cover was indeed cracked near the bar studs also. I had my hopes up that I might be able to get away with a minor repair on portion of the case where the observed damage was...

Im glad you brought this up. I would have assumed any replacement crankcase part would have fit. Thank you for your wisdom. It’s already on the way here. I’ll take a closer look at it once it arrives and make a final determination.

Andy, Thanks for the input about the full wrap. The seller is providing a generous compensation refund because of this issue. With the refund, I have very little invested in it now. I found another post that states this is used as an AV flex limiter. Perhaps something could be fabricated and...

Ok. I'll get back to you once the saw arrives and it can be evaluated.

Good morning! I purchased a used MS661C on ebay over the weekend. After winning the bid on it and doing more research to track down a replacement handle, I noticed the upper cup that has holds the AV bushing is snapped off from the clutch side of the crankcase. This was not identified in the...

Brad, I picked up a new screen, chopped off the cover and installed the cover. Maybe it would have been better to have found a small piece of tin to cut a patch out of instead of ruining a perfectly good spark arrestor. As long as it doesn't melt anymore plastic panels I'll be content with it...

I took a look at your post and this is not the issue. The scorch marks are perfectly in line with the spark arrestor screen port. I think Mr. Snelling nailed it by identifying this as the culprit. The sad part is the owner of the Stihl dealership I went to suggested it was a blown out muffler...

The spark arresting screen screw is still in place. I'll get in touch with my dealer and order a new screen to prevent any further damage. Thanks again for your insight.

There are no muffler mods that I can see other than the removal of the spark arresting screen. The saw was packed full of black crud. I suspect that could of had something to do with. The chain brake wouldn't function without a complete disassembly and thorough cleaning of the linkage with the...