Suavo

Hello everyone, My RC8T RS has what i believe is an air leak in its AE pro .28 engine. it idles at 250º and if you even look at the throttle funny it goes WOT.
I use Permatex Ultra copper to seal the base of the carb, backplate and fuel intake nipple. Any ideas?

MotoGod

iTrader: (118)

If you already sealed it...then your tune must just be WAY off. I would go back to factory settings and try again.

inferno13

iTrader: (202)

sounds like your low end needle needs to be turned counter clock wise a turn or two, if idle falls, adjust idle screw, go back to factory settings and give it a try

Suavo

i actually tried stock settings and low speed got better, but i still got some bad stuttering and high temps on idle. should the low speed and idle needles be sealed as well?

MotoGod

iTrader: (118)

I usually pull all the needles and put Green Slime on them and then re-install them. The HSN I yank the housing and seal the bottom of the brass upright to the carb body as well. Just as a precaution.

Suavo

I only have Teflon tape at the moment. Will that do until i can buy some Green Slime?

MotoGod

iTrader: (118)

I wouldn't use tape. If it breaks off and gets inside your carb...it will jam things up or worse it could get sucked into the engine. Might be safe...might not be. Have any light grease or anything? That's all Green Slime really is anyway ;-)

Suavo

i have some bearing grease. kind of thick but not to bad.

MotoGod

iTrader: (118)

Try it. Just use a VERY small amount. You don't need much on those needles.

Suavo

should it be applied to all needles including High and Mid

MotoGod

iTrader: (118)

I just do the high and Low. Mid I wouldn't touch in any way, shape, or form to be honest. lol

Suavo

ok cool. i'll give it a try this afternoon and post the results. Thanks for all your help

Do-Over

I have the same truck and mine came with a faulty tank that was sucking air I hear it is quite common check for air bubbles in the lines. Also, IMO unless your a pro. DONT touch the MSN.

Also, check your idle gap so you don't over lean your LSN. I'm fairly new but I've learned this much so far. Hope it helps!

Oh, forgot to add this. My engine(same as yours) runs between 235 and 245 all the time. Your temp might go down as the piston and sleeve start to wear in, alot of pinch causes heat.

JsK

iTrader: (10)

The backing plate is leaking around the roto-start.