Stihl 026 rebuild

[czar800]

.025 of the keyway. Most recommend .020, but I've gone as much as .030 and got more rpm. I find .025 to be a good balance.



Mandrel angles sounds interesting. You're gonna cut the piston dome off, correct

Is he making you angled sanding mandrels as well?

Thanks Al .025 it is.

He cut the piston flat, but left a little just like your pic.

I never asked about sanding mandrels..

 

[czar800]

He said he was going to make me a few different carbide cutters at few different angles. There going to be held in with set screws.

 

[Mastermind]

I wanna watch.

 

[czar800]

I wanna watch.

Now I definitely cannot post any more photos of my hack grinding!

 

[Mastermind]

Listen.......how it looks is not so important as we make it out to be.

Try to keep a good arch on the exhaust roof, and make sure the bevels are good.

 

[czar800]

Have a look.... I widen the exhaust, but the only thing that touched the top was a cotton buffer wheel. It looks flat?

 

[czar800]

 

[Stihlbro]

I agree the exh roof does look flat, when you widened, it may have taken some of the arch out. Or it could be the camera angle.

 

[czar800]

When I get the cylinder back I'll try to take some more pictures of it.

 

[czar800]

I'm thinking Monday I'll have it.

 

[Mastermind]

Run a ring up to the top of the exhaust port with the piston. Then see if it is too flat.

 

[czar800]

Run a ring up to the top of the exhaust port with the piston. Then see if it is too flat.

Will do, thanks.
Took .025 off

 

[Mastermind]

Looks good. Is she running yet?

 

[czar800]

Looks good. Is she running yet?

I'm waiting on a friend to finish up making me a mandrel so I can cut the squish. It really sucks not having any machining tools. Hopefully a few more days I'll get it going.

 

[Milkman31]

I've got a 026 that I'm putting back together. I have a walbro wt22c and a walbro wt194 witch one would be the best? The saw will only have a muffler mod and timing advance.

 

[czar800]

I've got a 026 that I'm putting back together. I have a walbro wt22c and a walbro wt194 witch one would be the best? The saw will only have a muffler mod and timing advance.

There both good carbs the wt22 will feed a mm saw just fine. The wt194 is a bigger carb that's what I would run.

 

[czar800]

Ok my "buddy" just sent me a few pictures. Hopefully he'll be done this week.

 

[czar800]

Got all the stuff that I need home.

 

[stihl_head1982]

 

[drf256]

Very nice build thread. My favorite threads on these forums.

A few questions.

On that key, it doesn't look symmetric. The flywheel will only advance to the thickest part of it. Looks like theres a central hump in it.

On the exhaust port, as Randy said, slide a ring up and take a look. Looking from the outside can be deceiving. How much you pulled out of the port can affect the look. You coulda taken the arch out if you ground the sides out. Your port work looks nice.

How do you plan on adjusting squish and sanding band after you cut the band? Is he taking it back for you?

It's kinda a beoch without a lathe at your disposal on this model in particular.

I'm sure you know that after cutting the band flat, you will need to sand the chatter marks out, make sure that there is no ridge at the cylinder/band interface, and cut the base jug to get proper squish.