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This is a recently finished Stihl 066. I’m having trouble tuning out the the run-on as the saw returns to idle and the off-idle bog. The saw is ported with machine work. Complete rebuild. Meteor piston. 461 coil. It will idle all day. It seems like it settles into that idle nicely, but...

First time for everything…. Saw is a bubble top Stihl MS660 with a meteor piston. I’m a conservative porter and have never missed on a port. Figured I would rough in the exhaust after getting the transfers where I wanted them. I got everything cleaned back up, dropped the cylinder to find...

The 066 is an early model with an aluminum flywheel. The coil is delaminating and I have these 461 take-off coils I bought just for this. Now I am figuring out the best way to mount the Stihl 461 coil. It looks like the top hole in the coil is the reference to maintain timing. All three bolt...

I could use some help with the process of machining the backing plate for my 4-jaw chuck. It’s my understanding that the benefit of a blank backing plate is that it can be basically machined as part of the lathe to be perfectly true. I would appreciate any tips on process order, rpm, tooling...

What would be the preferred method to repair the top bolt tabs this 084 muffler? I presume it was originally welded nuts in these locations and it currently has through bolts with shouldered nuts. The front cover is in excellent shape. I just picked this saw up and it is pretty solid although...

2015 Husqvarna 550XP. Muffler mod and smoothed ports. No port timing changes and flywheel is not advanced. Built about 18 months ago with a meteor piston after purchasing it non-running. I had the carburetor flashed and had to replace a pto side transfer cover o-ring (thanks @cus_deluxe )...

Saws in question are 395XP and 272. I have rebuilt both from the ground up and am not certain on the correct fuel filter length and orientation. I've been having a challenge when cutting clutch side up on these two saws... The fuel line seems to suck air almost immediately, unless the tank is...

Who has high quality Dolmar 421 / Makita 4300 pistons? I came across a saw in need of a piston. New OEM $60+ and lists at 42mm. Has anyone used an alternative like a 345 or 346xp piston?

The 562 and 550xo v1 discussion made me want to further my understanding of heat soak. It’s approaching summer in the desert. I’m native to AZ and the summer means lots of daylight, so I still work outside like normal, maybe even more. The other day I needed to remove a few trees and my...

I’m looking for the following parts for a Poly flywheel 660: PTO side case 1/2 Tank handle Air cleaner / carb post Possibly a coil Please let me know what you have. I’d be happy to do some trading.

I have a few saws with leaking fuel tanks at the seam (350/346, 288, 660). I have considered it just a slight inconvenience and know to drain the tanks immediately after use. I started looking at the purpose of tank vents for run ability issues on a few other saws and my understanding of tank...

I’ve got 5 52mm saws I am working on. I’ve been using old pistons with adhesive sandpaper to get by with cleaning up the squish band, but I want to take the next step with dialing in porting in these saws. Is anyone up for building a mandrel with HSS cutter for me? Is a delrin mandrel the...

I would like to build an 044/046 hybrid and am looking for an OEM 046 / 460 cylinder. A clean piston would be a plus. There is a fair condition set on eBay for $80, but I would rather deal here if someone has one close to that price point. Thank you!

What stand is this that @tree monkey is using? Are there better current offerings? Many of the older threads are missing pictures and I am looking for ideas. Thanks!

I’m looking for good condition case halves or at least a PTO side. I could live with any good case from an 051, 075, or 076. I’ve got items to trade as well. Thank you! I need to replace this seal flange!

Makita 6421 has a smoked top-end and needs at least a clutch. Low hour saw that got seriously abused by its last user. Looks to be a rental. Husqvarna 576xp runs, has every mount broken, and has clutch side damage. Also an abused saw with good plastics and paint. Husqvarna 272xp. Both...

I’ve got a Husqvarna 395xp torn down to port. It was a good runner but needed a piston to be freshened up. Current numbers with a Meteor piston and base gasket removed: Exhaust: 104 Transfers: 119 Intake: 78 Squish: .030 All of the threads with 395xp numbers are...

Saw is an 075AV. I’ve searched and found many threads on the oiler, but am uncertain about which seals are the culprit for bar oil feeding into the crankcase. Would someone please ID which seal and possibly the part # is what I am looking for? The actual pump is pictured below. Thank you!

Preface: This is the first large McCulloch I have worked on. 1-71 3360 block. When pulled over slowly, I hear an air release sound at compression, almost like a decomp. I can’t see a manual decomp. I have consistent, weaker spark and cannot get it to start with mix prime down the carb. It...

I have a really rough OEM 372xp (2003 model) that is mostly tore down and 95% complete. I purchased it like this in a box with a few Stihl pro saws. The saw will need to come apart for bearings and I have no idea on the crank, yet. The cylinder will clean up well and the case halves look...