sandycb

Thanks. I've got a new (well, old) saw. Still thinking about whether to persevere with the 266 or sell it. Are you looking to ditch the donor saw or sell it?

Thanks... Andover area?

Near Andover

Sorry, missed some of the replies in the thread. Yes, new piston so not scored. Properly fitted (arrow / exhaust port etc). The gauge was at a saw shop so should be fine, and multiple pulls. It hangs fine on the pull cord.... doesn't fall at all, so unless the cylinder and piston were crap to start with, I think top end is OK. I will have a look at the carb, but until it overheated the carb was fine, so not sure why it now would be shot? Bit worth a look.

OK... I will give it a go. I assume the air filter will need to be removed? Don't really understand or assume prior to the replacement cylinder and pot the saw started pretty much first time every time. I do deek that the the compression isn't quite what it was though.... used to rip my hand off. It's still pretty aggressive but not like before.

Thanks!

No...., 'fraid not. Having rebuilt the top end, was still only getting 120psi on a compression test. Dried the plug, put a teaspoon of mix directly into the chamber etc...tested the spark. No joy. I think it's probably either got a leak in the crank seal or it's not keeping a vacuum, but I don't have access to pressure / vac testing kit and buying other for the one test is not cost effective. So I've called it a day for now. I'll see how I go with the 268 and maybe resurrect the old girl if I have time!

Gave up and got myself an old 268xp! Anyone know where I can find a PDF of a manual?

Thanks - had to work hard to find someone with a compression tester, so not sure if I can do the same for a vac test/pressure test...I did see what ADW suggested but tbh I lost the thread, and am probably not able to do a bottom end rebuild. Top end was about my limit!🤥

Hi Stubby - sorry, compression test. Yes, I was expecting it to be a bit higher, but they reckoned it would start at 120. But I'd be more comfortable if north of 150. Certainly I seem to remember that the pull cord could rip my fingers off especially when cold but now it's just a good hard pull. Not sure what else could have gone when it overheated....perhaps I just need to seal the gaskets with some motoseal (and perhaps strip and clean the carb, although that's not a pressure thing). Otherwise the old girl may be retired......

So, managed to get a pressure test at local shop. It came up as 120psi. A bit low for a 266 (67cc) but should at least start, but nothing. Stumped!

Thanks for all the comments and suggestions. Got a bit of lost in some of it but I think the starting point is a pressure test and if it is low work back from that. Any guidance on what I should expect from a 266 xp? I did change the plug as suggested but no joy. I should probably have a look at the carb bit wanted to do the pressure test first to save me wasting time if the pressure was too low.

I managed to 'cook' my Husky (not sure if wrong mix or jets not set up right) and had to replace the pot and cylinder. Local shop could not repair its as it's too old to get OEM spares. I got some AM parts and fitted them all fine. Kept the original carburetor. It still won't start. Seems to be sparking fine and it feels grunty to pull the cord (don't have a compression tester though). Put a tiny bit of fuel down its throat and tried that.... won't so much as cough. Any ideas? It's a great saw but have already spent £50 on diagnosis, another £50 on parts so there's a risk of throwing good money after bad. Against that, an equivalent new saw is about £600-£800 I'm told. Help!