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Stock suspension works good if you only want to run 20 and 24 inch bars. Or for the occasional longer bar. The 661 front spring and buffer is a cheap upgrade and works well if you do want to stiffen it up. The stock muffler isn’t what I would call restrictive. Adding the weight of the...

I originally didn’t see your 1st pic. Still odd that it did it in the transfer rather than the exhaust port which is 2-3x wider

That is debris from inside the motor or it injested something through the intake

You need to quit stepping on that banana peel. Every time you do it you end up in the same spot.

.325 normally requires a 3/16 file or file kit

Set the coil gap to .010” and pull the starter over harder/faster and see if you have spark. The autotune/mtronic saws need a little bit tighter gap and need to be pulled over faster

Not much. Tired from eating too much at Denny’s gtg. Heading to da shop eh. Yeth. Twas a goot one

I do.

If it weren’t for guys talking to themselves this place would dry up 😂 Howdy fellers

Check to make sure your master control lever is still holding the throttle open slightly in the high idle position

It works OK with the holes in the fins being larger. These are 10 MM apart with a 5MM offset. If I were to do it again, I would go 9 and 4.5 to give more options. I was worried about strength but it’s a non-issue

Got tired of trying to make out which holes were for which cylinders. Ping chow, one size fits all

Mine is the common 9 x 19 size that are mostly made by the same company

Have you tried tuning it?

There’s been some hearsay that the term “health issues” may not be quite accurate

Sad deal how some builders end up doing this. Folks sure believe a lot of shît they see on YT. They need to ask around first before sending $ or saws

That could definitely be his issue. I saw earlier where he said the coil was making contact with the case. But if the case isn’t grounded to the motor, it’s not going to work right

Not familiar with a 391. But being a clamshell, the body of the saw that the coil mounts to… Is it plastic? You need to have continuity from the cylinder or base pan to the coil mounting bolts

You should still use a gasket if it originally had one. If they aren’t available you can make one from a sheet of gasket material available at auto parts stores

Your piston cylinder look perfect to me, although it’s from a distance. If there are no vertical gray streaks on the piston, it’s probably fine.