What in the world happened???

[Mastermind]

Here's some pics of a ms250 I tore down a few hours ago. The owner said it just started losing power and locked up, "what in the world happened?". Note the fine sawdust. It's been so hot the bearings are even shot.

I've found what seems to have ended it's life, aside from the dull chain and abuse. What do you guys think killed it?

 

[logging22]

I bet that piston wont polish out!! What a mess.

 

[chopperfreak2k1]

neglect? maybe that red stuff?

 

[1steve]

Here's some pics of a ms250 I tore down a few hours ago. The owner said it just started losing power and locked up, "what in the world happened?". Note the fine sawdust. It's been so hot the bearings are even shot.

I've found what seems to have ended it's life, aside from the dull chain and abuse. What do you guys think killed it?

I'm gonna guess heat from saw being so dirty. What did the cooling fins look like?

 

[Muffler Bearing]

Muffler Bearing Failure!!

 

[Mastermind]

Muffler Bearing Failure!!

Now how in the hell did you figure it out???

 

[Muffler Bearing]

Now how in the hell did you figure it out???

I searched your pic's and didn't see it. Total disintegration of muffler bearing!!:monkey:

 

[mtngun]

Mastermind, you didn't show us the air filter or the intake track. Though what we can see of the intake in the jug photo looks like it was sucking sawdust.

 

[Saw Dr.]

THose air filter clips always break off and let it eat dirt. If that didn't kill it, the crank seals eventually would have.

 

[Mastermind]

Not sawdust poisoning. The air filter was on properly and wasn't plugged.

 

[Pioneer42]

I was going to say it was running to hot due to the dirt around it as well.

I just parted out a MS250. The Saw had low hours for sure, just was missing too many parts for me to build it up. I listed the parts in the trading post section if you need parts...

 

[Muffler Bearing]

I bet his spark arrestor was totally clogged.

 

[GlenM]

neglect? maybe that red stuff?

Exactly my first two thoughts..............

 

[056kid]

Saws dont run too good on 20 year old turpentine . .

 

[pioneerguy600]

You know what killed that saw, plain old neglect. That thing was run ragged, worked hard and put away wet. That type of useage shortens the life of all OPE.

Pioneerguy600

 

[ckelp]

looks like that saw belonged to davey tree

off topic but, i'm the only one who before taking apart a saw (anything for that mater) spends a good 5 mins or so with a garden hose in my hand giving it a bath

 

[Mastermind]

You know what killed that saw, plain old neglect. That thing was run ragged, worked hard and put away wet. That type of useage shortens the life of all OPE.

Pioneerguy600

That is exactly what killed it. I did find a smoking gun though. I don't want to give it up just yet. Someone will hit on it soon enough, it's a fairly common issue. I will say this much, it passed the vacuum/pressure test.

looks like that saw belonged to davey tree

off topic but, i'm the only one who before taking apart a saw (anything for that mater) spends a good 5 mins or so with a garden hose in my hand giving it a bath

If this saw wasn't a clamshell design I would have cleaned it up much better before pulling the jug. This one will all go in the parts washer, except the crank and carb. The carb will be cleaned in an ultrasonic bath and rebuilt. The crank will get new bearings and seals.

 

[Muffler Bearing]

Staight Gassed It!!

 

[Mastermind]

Staight Gassed It!!

No. But the fuel was a watery blend of ethanol, two-stroke oil and gas. It may have even had some piss in it.

 

[Muffler Bearing]

No. But the fuel was a watery blend of ethanol, two-stroke oil and gas. It may have even had some piss in it.

Say no more!!
I'm starting to tear-up!!