Saving an 029

[Hobo Hilton]

I came up with a Stihl 029 saw. I knew it had a scored piston. I have it torn down and need some suggestions. I've attached a couple of photos of the cylinder. I think, with some time, it will clean up. No scoring above the ports. Is it worth the effort to attempt to save the cylinder?

Thanks,

Hobo

 

[jd548esco72]

check fleay-bay for a replacement short block ---

 

[TonyM]

If it were me, rather than take a chance, drop an 039 p&c on it and have a saw that has a respectable power to weight ratio.

 

[HarleyT]

Buff it out, pop in a new piston assy. {correct size}, and figure out what burned it up.

 

[a. palmer jr.]

That's a 45mm piston and they are less desirable and higher priced than the 46 or 49mm pistons. I would buy a new 49mm aftermarket kit for around $30 and also check the engine for air leaks.

 

[HarleyT]

That's a 45mm piston and they are less desirable and higher priced than the 46 or 49mm pistons. I would buy a new 49mm aftermarket kit for around $30 and also check the engine for air leaks.

Is that for piston and cyl, or complete engine?

 

[a. palmer jr.]

Is that for piston and cyl, or complete engine?

I paid less than 30 for the piston/cylinder. It was on ebay, I'd bought from them before without problems so I bought at least 4 more. I have bought complete engines before but didn't use the lower end because I didn't know how good the aftermarket crankshaft and rod were. I eventually stuck another engine together using them because it had a bad crankshaft and I just used what I had.
I just looked it up and it was from machinesdoctoronline and it was 19.99+5.99 postage. That was the one I was talking about not needing a ring compressor, just push the piston in (carefully).