running extreamly rich

[Motoman]

3.3 TRX running very rich, full tank went to 1/2 tank on idol, in just a few minutes. Exhaust has constant drips of fuel, but the high speed needle is only 1 and 1/2 turns out! I have no Idea what is going on. Please give me some things to look for.

 

[jose.28]

Check you lsn and check for air leaks

 

[Cornholio]

+1 for checking the LSN.

 

[Rolex]

I agree on the LSN. If you hit the throttle with the setting you have, it will just blubber. Start to lean it just a little at a time, running it for about 30 seconds between adjustments, till you get a good take off.
Don't make any adjustments till it's warmed up.

 

[Motoman]

I did seal the whole engine. LSN was at 1 and 1/2 turn out, and the thing was still very rich, that is what I think, because the engine never went through so much fuel as fast as it is, like i said the gas tank waas 1/2 empty at idol with these settings. So I can't understand why I would richen it more?

I dont understand why it is going through the fuel so fast/ thus running rich, with these needle settings?
Can anyone explaine?

 

[Snook Man]

Did you remove the piston when you sealed the engine? If so you may have installed the piston backwards which would result in your symptoms.

If the piston is installed correctly and the HSN and LSN is set to 1.5 turns out and it is truly running rich you have a problem…
Look for an obstruction in the pipe causing too much pressure to the fuel tank, extremely dirty air filter or a broken/chipped piston skirt or broken wrist pin saddle are a few common things that can also cause the issue.

 

[Motoman]

Good info, if I remember corectly, I installed the piston with the bottom area missing facing the carb. The air filter is clean and new, so I may take it appart again to check the other possible causes.