Chainsaw Repair

Hi,

 I filled the 45 up with gas from a container marked with 2 stoke on it, and i think it was just normal gas.  ran the chainsaw for a bit and it stopped. Had it in the local repair place with the muffler off and you an see a vertical line or two in the side of the piston as you rotate it by hand. Guy said it's stuffed. It moves freely it seems and seems to have compression.

 What are my options? New piston? New piston and cylinder? Is that all i need or should other bits be replaced too? If I'm replacing the piston and cylinder is there anything I can do like put a larger piston in it? How easy is it to do yourself or do I need special tools?

Thanks in advance.

Regards,
g@z.

You will have to take the cylinder off. If there is aluminum transfer from the piston on the cylinder walls. Then you can use muriatic acid and sandpaper to remove the transfer. If its gouged above the exhaust port, then you will need a new cylinder. The piston will need a new ring and sometimes a piston can be saved with sandpaper as well. Depends on how bad. Pics would help. I would change the seals and possibly the bearings since all that area will be exposed anyhow.Being a clamshell design, i doubt you can put a bigger top end on it. If you had a 40 i bet the 45 top end would bolt up to that. Old gas/mix is as bad as straight gas IMO. I fixed a trimmer for a guy that needed new fuel lines, well i changed the fuel lines, started it up and it ran for 10 secs and i smoked it. turns out the gas had been in it for a couple years. Now when i fix something i dump the fuel and use my own.

Some aftermarket P&C's are ok and some are pretty rough. If you want something to get you by. Try one of the cheap ones and let us know. It looks to me you have alot of carbon scoring on the cylinder. was this saw running rich or have a real dirty air filter?

Ebay seller dandrikop ("The Greek") sells good AM stuff.  I have used P&C kits from Ebay seller kafar85 (Mag Supply, Golf pistons) with good success.  Main advice on Golf DO NOT USE THE CIRCLIPS supplied with piston use OEM clips.  49 P&C kit should work on a 40-45.  http://www.husqvarna.com/ddoc/HUSI/HUSI2001_AAaa/HUSI2001_AAaa__1062425-63.pdf
Shep