My first rebuild, an old Stihl 026 I picked up for $50 years ago.

[anymanusa]

I saw this thing at a friend of a friends house about 6 years ago and the guy said it wouldn't run. I took it home for 50 bucks and threw it in a bin half tore apart.

Well I finally made the time to play with it and I found the piston badly scored. I couldn't even remove all of the piston rings as can be seen below, there are parts that are "welded" or scored into the lands.

Compression measured 50psi.

I bought a kit on ebay for 23 bucks shipped that had the piston, the cylinder housing, the rings and gaskets.
The brake is all cracked up too. I don't know how much that will cost. I've taken the springs off the mechanism as can be seen below. I'm hoping it will go together easy. It looks to be tricky.

The sprocket has pronounced wear.

I've tested the ignition. It works fine. I don't know about the carb. I'm hoping that after I slap it all back together, it will run fine. Any tips would be welcomed. I'm very mechanically inclined, but I've never done this before.

 

[anymanusa]

http://www.ebay.com/itm/272344671020?_trksid=p2057872.m2749.l2649&ssPageName=STRK:MEBIDX:IT

this is the kit I bought.

 

[Jasonrkba]

Might want to do the crank seals.

 

[anymanusa]

just bought this whole kit for 19 bucks.

 

[anymanusa]

Might want to do the crank seals.

do you mean like split the case open and the case seals?

 

[Jasonrkba]

Sorry. Oil seals.

 

[Jasonrkba]

Just a thought.
You have a scored P/C, a leaky seal can cause a lean mixture resulting in siezed/ scored piston.

 

[cus_deluxe]

Yep something caused that failure, best sort it out while youve got stuff apart

 

[anymanusa]

Just a thought.
You have a scored P/C, a leaky seal can cause a lean mixture resulting in siezed/ scored piston.

The case seal or the cylinder to case seal are the only two that could cause that symptom?

Also, the saw has a hole and marking foe an adjustable oiler but I don't see a screw or flat to engage. It just looks like a hole with a piece a plastic rod stuck in there sideways.

Nothing on the saw indicates "pro".

 

[dc8ball]

how can you tell it's an 026? I picked one up out of a scrap heap and looks similar to yours

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[anymanusa]

how can you tell it's an 026? I picked one up out of a scrap heap and looks similar to yours

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The cover has that on it.

 

[anymanusa]

Oh this shows where the crankshaft seals leak as well.



I'll maybe look into this.

 

[anymanusa]

Yep something caused that failure, best sort it out while youve got stuff apart

That really never even crossed my mind. I assumed misuse and abuse caused the failure. I guess a crank seal could be the cause though.

 

[dc8ball]

The cover has that on it.

mine doesn't

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[bulletpruf]

Subscribed...

 

[Whiskers]

mine doesn't View attachment 557633

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Thats a regular 026. The pro would have a decomp and stubby tank vent for a larger air filter. The 024s and 026s look the same but the cylinder fins on the top of o24s are flat and don't stick up like that. You can measure the bore to be sure, it should be 44mm, some of the later 026s and ms260s had 44.7mm bore.

 

[farmer steve]

The case seal or the cylinder to case seal are the only two that could cause that symptom?

Also, the saw has a hole and marking foe an adjustable oiler but I don't see a screw or flat to engage. It just looks like a hole with a piece a plastic rod stuck in there sideways.

Nothing on the saw indicates "pro".

my 026 has the same hole for the adjustable oiler but no AO. i think the case was used for both the 026 and 026 pro which had the AO. replace impulse line,fuel line and manifold boot while you have it apart. most here don't recommend aftermarket parts for those items. good luck .

 

[anymanusa]

mine doesn't View attachment 557633

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[Matt_Ellerbee]

mine doesn't View attachment 557633

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As whiskers said,yours could be an 024,024 Super or an 026. All in the same family and all share parts. The bore and stroke tell them apart. Good little saws too.

 

[dc8ball]

I found these numbers on chain brake 0000 967 3611 and 1121 792 9101

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