Running issues with Husqvarna 346xp

[billpierce]

Whip the pot off and have a look, very extremely good high chance itll clean up, hone the cylinder, i use 100grit dand paper to start and work up a few grades. You'll get read of the Ali transfer. Then get yourself a meteor piston kit from the Ebay Greek fella. Pop that on ( probs watch a vid or two on youtoob). You may need a new gasket on base of cylinder. Might be ok though.

Now, before you get any further, vac and pressure the saw ( youtoob again) sorting out the inevitable airleak. As there will have a been a cause to the seizure ( fuel, lean h jet, or airleak). This must be addressed or youll be doing this again in a day or two

[dannytreacy]

Thanks for the info and replies, bit of a learning curve!

[dannytreacy]

47 minutes ago, billpierce said:

Whip the pot off and have a look, very extremely good high chance itll clean up, hone the cylinder, i use 100grit dand paper to start and work up a few grades. You'll get read of the Ali transfer. Then get yourself a meteor piston kit from the Ebay Greek fella. Pop that on ( probs watch a vid or two on youtoob). You may need a new gasket on base of cylinder. Might be ok though.

Now, before you get any further, vac and pressure the saw ( youtoob again) sorting out the inevitable airleak. As there will have a been a cause to the seizure ( fuel, lean h jet, or airleak). This must be addressed or youll be doing this again in a day or two

Just wondered which size piston I’d need (my 346 xp is 2002 model), there’s a few diameter variations of the meteor make from the Greek seller, thanks!

[billpierce]

Silver side cover 50cc is big

Orange side cover 46cc is small

[htb]

If the right cover is on the right saw. I've got a 50cc orange side with no decomp, original pot

[dannytreacy]

It’s a silver cover, 50cc, original as far as I know.

 

it has the decompression valve too 

Edited May 15, 2019 by dannytreacy

[billpierce]

44. Something mm for you then

https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.co.uk%2Fulk%2Fitm%2F392121491725

Or measure it after you have pulled the cylinder I case someone has changed side covers somewhere down the line.

[dannytreacy]

48 minutes ago, billpierce said:

44. Something mm for you then

https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.co.uk%2Fulk%2Fitm%2F392121491725

Or measure it after you have pulled the cylinder I case someone has changed side covers somewhere down the line.

Thanks for the link ? One more question, could the damage to the piston be the thing that is causing the saw to stop after a few cuts or is it more likely another issue that is responsible for both problems?

[billpierce]

This is the cause. When the cylinder warms up it expands, reducing compression as the piston and rings are worn beyond design it loose compression. I think, prolly someone who knows more can explain better. 

 

It is essential you address the cause of the seizure though! So unless you have been rinsing the neat fuel through it, there is another issue. See my previous post about that.

 

Gan canny on the cylinder bolts ( do not shear or strip them) and get plenty YouTube in. Have fun

[Wedgebanger]

I read this thread, and think you need to pressure and vac test first.... then see if you find a leak, (maybe a crank seal) That could be the  real reason why it semi seized. Unless neat gas has been used. Have you let or know if  anyone else used it..?

 

if you just get the bits you think you need then reassemble it only to find you have to dismantle it again. 

 

my best advise is, unless you are good at fixing things and can bodge up a p&v test. It would be better to ask spud what it may cost to fix..  it would save you a lot of time. 

 

btw it’s a good saw to port, so  YouTube it to see what they can be made to do.

 

edit, if you took it to a dealer, they’d say bin it and buy a new saw. 

Edited May 16, 2019 by Wedgebanger
Edited