MS460 Teardown-Comments Welcome

[Adirondackstihl]

BFH

 

[MustangMike]

Nice action shot there Jeremy!

 

[Gunn]

Usually a couple whacks with a rubber mallet on the cylinder frees up a seized piston. Remove the bolts, hold saw up by cylinder and give it a couple taps. Just be careful with the fins.

 

[DSS]

Make a grease zerk fit into the spark plug hole and pump away untill you can pull it off

Messy but effective, piston has to be above the transfers though or you fill the case

 

[MustangMike]

I got lucky, this piston was still moving. Just got done pulling the jug (yea, I know, I'm up late).

OK experts, tell me what I'm looking for. The piston is fried real good on the exhaust side, but the the intake side looks like nothing is wrong.

The saw is kinda dirty, with a lot of fine grain stuff on it. Was he over working a dull chain? The sprocket looks a little hammered. The B&C don't look bad at all. Came with a 20" ES bar and full chisel chain (I can convert it to square).

Also had a brand new NKG plug in it looked like it had never been fired. All the plastics are good, and the recoil is in great shape.

I also notice that the 440 had the heat shield behind the muffler just like the 460s, but my 044s don't have them. Are they necessary?

 

[junkman]

The heat shield on the newer saws i SD there because of the small exhaust outlet choking the saw up producing more echaust heat ,once dual ported and stock opening enlarged is not needed

 

[MustangMike]

I just discovered why the saw "cooked", the Hi speed screw is only 1/4 turn out! Someone likely tuned it backwards (turned the Hi 1/4 out instead of the low).

 

[mdavlee]

That's how most I've got in boxes. Carb screws are all the way lean.

 

[Moparmyway]

Messy but effective, piston has to be above the transfers though or you fill the case

It would go out the exhaust first

 

[DSS]

It would go out the exhaust first

Pffffffftttt

Gorilla tape FTW

 

[junkman]

You gonna put that 460 jug on the 440 Mike ?

 

[Canadian farm boy]

Now we're talking

 

[Adirondackstihl]

You gonna put that 460 jug on the 440 Mike ?

 

[MustangMike]

I thought about that Brian, but I'm trying to get my hands on an 046 that may need that P&C, so I think I'm just gonna replace the piston on this one.

If I can get this saw to run anything close to 044#1, I will be very happy.

 

[Glock37]

I got another 046 case fully powdered with bearings and crank ?


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[MustangMike]

I saw that, but I don't have the rest of the fixins!

 

[Glock37]

Well what ya waiting for start gathering for next build !


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[junkman]

If you decide to mount the 460 jug to the 440 ,a few of us here can help you with the mods needed to make it bolt on ,there is a couple spots o the outside of the jug need ground down a little ,and a chainsaw file works good to alter the base bolts

 

[Adirondackstihl]

 

[Canadian farm boy]

It's really not all that hard to put the 460 jug on the 440. I did it. ( had lots of help from other here)

You can always put a 440 jug back on later if you don't like the hybrid.

You know you wanna...