Cuts out when warmed up.

[MatthewJ]

My Tmaxx 2.5 runs fine, but once she is warmed up she keeps cutting out. Then it's very difficult to start.

Any ideas ?

-Matthew

 

[Metalhead Matt]

Need more info, bud. Temp would be a good start. If it's tuned good, it may need a rebuild.

 

[Tmaxx96]

sound like it needs a repinch

 

[NCNitro]

If it is indeed tuned properly it may be time for a rebuild. It is also possible it is running too lean and flaming out. Try fattening the hsn a little and see if that helps.

Knowing what temps you are running would be a big help.

 

[MatthewJ]

I"m not sure on the temps, I haven't bought a temp tool yet. I'll try the hsn and see how it goes.

 

[Metalhead Matt]

Try the pinch test. Squeeze the fuel line as close to the carb as you can. It should take between 3-4 seconds to rev and shut off. If it's more, lean the lsn. If it's less, richen it. Remember, TINY adjustments. Then run it for a few minutes at operating temp(warmed up) between adjustments.

 

[MatthewJ]

What temp should it be at ? And which way to i adjust if it's higher ?

 

[RC Addict]

T-Maxxas seem to like temps in the 260-275 range. If you are hotter (and thus too lean) then you need to turn the HSN counter-clockwise to richen the mixture. Not much-- an "hour" at a time.

I would check/do two other things. Install a fresh GP and check for any leaks in the fuel tank. Often times a leak will not be apparent at a full tank but shows up after the fuel level drops below the problem area.

 

[Metalhead Matt]

Mine was doing that today. Opened the hsn until it stopped. Every time I start my 2.5 is like the first time. JUNK! Slow, too. It's shot. 3.3's calling my name....

 

[MatthewJ]

260-275 range .. C or F ?

 

[Beddo]

F (about 130 C)

 

[Bobray95]

Traxxas has the engine exchange program. Take your old engine to your LHS and they will sell you a 3.3 for half price. I had an old pro.15 and upgraded to a 2.5r engine.