HELP running like crap for no reason

[knall]

Tmaxx 4909 3.3 has run great for the past year. ran tonight for 5 minutes then THIS HAPPENED.


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Ran great, didnt change anything.

wasn't too hot....

Throtle linkage is still working... carb is opening. I removed the air cleaner... didnt help. Toped off the feul didnt help.

Heres the kicker..... I can hold the throttle wide open and the thing doesn't move.... if I pinch off the feul line..... IT TAKES OFF then of coarse it runs out of feul.

I have not changed anything.. and it ran good for 1/2 of a tank.

Midway through a tank of gas.... it just decided to run like poop.

I took this video after checking all the obvious stuff.

OK because I notice dthat it would move when I pinched the feul line I decided to lean the HSN.....

MAGIC INVISABLE CRASH....must have backed it off. i am assuming the threads are stripped. I turned it WAY WAY WAY in and its back to running nice again. there was no reason for the HSN to have gotten that far outa whack..... must be stripped.

another problem.... ITS INHALING fuel....... 2 tanks for 5 minutes of complaining

 

[knall]

ok got her running again.... but i am 2 TURNS OUT on the HSN !!!!! seesm lean to me? yes?

i am getting blue smoke enough to make me feel better.

 

[NCNitro]

Do you have a temp gun? If not a strongly recommend one as imo it is an essential tool for propper tuning.

 

[olds97_lss]

Could just be that the o-ring on the HSN dried up. Had that happen a few times and most recently on my LRP that's 2 years old. The HSN would walk in on me and lean it out. Only took a few revs of the trigger while holding the truck in the air and I could watch the needle turn a full turn within a few seconds.

Went to my hardware store and found a relatively close rubber o-ring. Don't think it's rubber though, some kind of synthetic. Works fine now.