268 still wont go

[miker]

cleaned carb,new gaskets and diaphrams,new pot gasket,cleaned tank breather,set metering side of carb,good compression and spark ,but she just floods and wont start, anything else before she goes into the shop??

[Graham]

Crank seals?

[miker]

would that not make it lean??

[Graham]

It would but just a suggestion why it won't start. I had a 026 that refused to start. Stripped so many times and diaphragms/gaskets changed etc then, seemingly, of its own accord decided to run. Strange machines at times

[miker]

they are indeed, my arms hanging off trying to start it

[Mortimer Firewood]

I had the same problem with a 268 that i purchased last year pull pull pull nothing and i am not good with the mechanics of two stroke gear i gave it to a mate of mine that does all our repairs and he got it sorted i dint ask what was wrong but i will find out when i see him this week .

[miker]

cheers mate

[Megatron]

Does the saw even fire? Is the plug wet?

Do you have another known good carb off a different saw you could try?

Sounds like the inlet needle is not seating/sealing properly.

[spudulike]

Mmm - ran out of talent again:001_rolleyes:

 

If it is flooding, it may be the needle valve isn't sealing correctly and fuel is dripping through it and passing it in to the crank case - take the carb off, connect a bit of tube on to the fuel connection, suck the tube and stick your tongue on the tube, it should hold pressure for 10 secs or more. You can blow and also see if it leaks.

 

Common faults when rebuilding carbs are the gaskets being in the wrong sequence - the pumping gasket with small flaps is next to the carb body and the diaphragm spacer gasket also fits next to the carb body - this stumped me for a while.

 

Have you compression - I am assuming you have as I know you do a bit!

 

Is your choke sealing properly?

 

Is your fast idle mechanism working correctly - have you tried starting it holding the throttle wide open with the choke off?

 

Unlikely to be an air leak as it would lean out the saw and just cause a poor or racing idle.

 

If you get stuck, I am sure I can fix it!

 

Oh - did you replace the welch plug? This can cause issues that I will let you know if you have!

[miker]

saw will fire on choke when cold,then just floods up,checked and double checked diag and gasket sequence,not touched welch plug,tons of compression,tried starting with throttle wide open all to no avail