cygnusnsf

UPDATE! - So after cleaning cylinder transfer using brick acid and cotton bud for while and then replacing piston and ring, fired up on second pull! I now have a very smokey running chainsaw so now I need to tune the carb I guessing. But at least she runs! Thanks all for your help! Oh and managed to get a pal to do the helicoil so thats done to! Thanks again

OK Thanks I'll have a look...

Seems Harpic blue is little more difficult I guess Harpic Power plus is a possible workaround as contains the hydrocloric acid same as blue anyone tried that?

Ah OK thanks unfortunately its a 41cc nevermind. Just trying to find some Harpic Blue now to clean off the transfer.

I did find that one of the bolts attaching the carb was stripped and when sprayed in the carb cleaner can see it leaking out between gaskets, so that may also have some bearing. I will of course check the carbs once rebuilt. Also make sure I use the right fuel ? as I dont really have much of a history of the unit.

So I managed to get the cylinder off and the piston is well and truly scored, but to the untrained eye I think the cylinder is OK. I take it its the shiny areas that would need cleaning off of the transfer and then gentle rotational rub with 2 stroke oil with fine wet n dry and then thorough clean after.

Thanks for the suggestion I'll see if have room but have feeling its a little difficult to get behind it to fit one.

Thanks - yeah I'll check out for helicoiling as did it a long time ago as an apprentice, but not recently and will need to get a kit. But as ever thanks for all the suggestions and updates its really appreciated.

OK Cool got it!

I have one for Spares if needed - Or if you like to sell as non runner ?

OK so gonna grab me some Harpic Blue and soak the cylinder then use some wet and dry with it to gently remove any transfer. I take it that rotational movement to remove any transfer much better than the up and down movement mimicking the piston movement? I also have found one of the bolts holding the carb has a stripped thread so that might be a reason was running lean potentially. Not sure how I could then rethread will have a look round to see if there is any ideas to fix that. Thanks all for comments above.

Any tips for cleaning - seen things like oven cleaner which would be fairly cheap.

OK Cool as I really just want to use as learning exercise I guess a few quid and some time not an awful idea. I think I'll get the cylinder off see if thats badly scored and if I clean it up see if a new piston and ring will do the trick.

Sounds like a good saw!

Thats the Badger! Here are some photos with muffler off... Piston looks nasty