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I'm getting pissed, IT WONT START!!!

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T

T-Maxx Racer

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I have almost finished my 2 grand T-Maxx except for a silicone exhaust coupler, which I havent got around to getting yet. So I just made my own out of some big tubing I found a tied it to gether with huge zip ties. The only reason I did that was that I really want to drive it!!!! But it wont start enen when the roto start turnes it faster than any pullstart. I was thinking about that piss poor coupler having an airleak, because sometimes I see oil dripping out of it. That makes me think that I'm running it to rich, so I leaned the high and low speed needles 1/4 turn from factory. If I put a few drops of fuel in the carb it will fire up but die in seconds. Then the roto start broke that little starting pin thats way inside the engine so I ended up tearing it all apart and replacing that piece. DAMN CHEAP PARTS. So would that little airleak in the exhaust cause starting problems. Its just to small!

-Will
 
Well, first off, you're not getting fuel to the carb. Check your fuel lines. Also, there probably isn't any exhaust pressure going to the tank which is probably the reason why you're not getting fuel to the carb.

It could be your make shift exhaust coupler that's the problem. Replace that ASAP.

You might try richening up the LSN a turn or so and seeing if it'll run at all. I had my LSN on my hyper 8 way too lean cuz I misread the factory settings and it wouldn't even start.
 
I'd say the first place to start is the make-shift exhaust coupler. As Kwong stated, get rid of it and get the right thing. If that is not an option, then try using some sealant at either end of the coupler to keep the airleak from stopping you.

Next, I'd recommend going back to factory pre-sets for the engine and giving it a go (of course this is after solving the coupler problem).

If you still can't get it going, you may have other issues that will need to be chased down, but for now it sounds like your problem is the coupler.
 
why would u spend 2,000$ before u see if the truck works? i would hate that, u have a truck that is $2000 and the thing dont run!:angry:

bryan
 
Different strokes for different folks. In this case the problem can be traced back to a three or four dollar part. Either way, he'll be much happier when he finally gets it going.
 
I agree with the first reply. If you are running too lean, it won't start. If you have changed the LSN and HSN, set them back to the factory default settings. Make sure you have the pressure hose from the exhaust to the fuel tank. Put the glow plug igniter on the engine, plug the exhaust with a finger while attempting to start the engine to pressurize the tank. Remove your finger after a few seconds and see if it starts!
 
I got the part and it still wont start. :flaming: I must be doing somthing else wrong but have have started this kind of engine many times before so I should know what I'm doing. To me it seems like its still not sucking fuel from the tank because I can get it running fo a few seconds but putting a few drops of fuel in the carb. Could the big dual exhaust that I have on it not be giving it enough back pressure to pump the fuel? I have it set back at factory settings, are the .21bb engines known to be hard starters? I want to pick that damn piece of metal up and throw it arross my yard, then I rembember that I'm a kid and I dont have enough money to replace any more parts since that time it did about 20 flips across my neighbors field. Bad driving!!!


-Will
 
Okay, make sure you reset All the needles to factory.

Richen the HSN a full turn more, and richen the LSN a half a turn from factory.

Try that...you're gotta be running lean.


I got a theory to see if there's enough back pressure...put fuel in the carb. Then pull the fuel line off the engine and let it hang freely. Start the engine up, and watch the fuel line, if fuel drips out or moves towards the end, then you're got enough back pressure. You gotta be fast since the engine will die quickly.
 
You've mentioned a new twist on the problem...the dual exhaust. Getting the engine to start is a matter of getting fuel to the carb. How do you prime your engine?

Once you have gotten fuel to the carb, the engine should start (you have experienced this by adding fuel directly to the carb).

Once the engine is running, if the pressure is sufficient it should stay running. This is where things get tricky.

If your fuel tank has a primer button, that is a typical source for an air leak. If not, then your dual exhaust (depending on the type) might not be providing enough pressure. Other issues could be air leak related and you'll have to systematically check everything to ensure that is not the case.

Do you have a fuel filter? Or is the tank one of those with a built in filter stone? Either way a clogged or dirty fuel filter can also cause this problem of fuel not getting to the carb.

Check on those things and let us know...

Also, time to check and perhaps replace the glo-plug...just another area that might make the stubborn engine harder to start.

BTW, properly broken in the .21BBis a great engine for the T-Maxx and it is fairly easy to get going.
 
I used to prime my engines by covering the exhaust hole and turning the engine over with the pull-start. But now when I do that with the dual exhaust I dont see any fuel moving through the line so I have resorted to removing the line going to the exhaust and blowing through it until fuel moves to the carb.

My fuel tank had a primer but I removed it and set a screw in the hole and put some sealent around the scrwew so it wouldn't leak.

The glow plug is an O.S. number 8 plug which the hobby shop people said was good for easy starting. The fuel filter is in the middle of the fuel line and It has recendly been cleaned.

I talked to my dad about it not starting and he said the the carb might be all gumed up inside so I should take it apart and soak it in gasoline, like I had to do with an airplane engine that wouldn't start.
 
It's gonna be something with the pressure line, but probably with your exhaust system. You say that when you cover the exhaust and pull the pullstart, no fuel goes to the carb.

Could be a clogged pressure line fitting thingie that is attached to the exhaust.

Try putting on the stock exhaust and see if that works.


btw, too bad you're in yakima, if you were closer I could meet up with you and help you out.
 
another thing, are u covering both the holes on the dual exhaust or just one. because just putting ur finger on 1 of them isnt going to help u out any.

bryan
 
I had a big motorcycle accident and I have not gotten around to getting this posted. IT STILL WONT START . There is backpressure because I see the fuel moving through the line to the carb. I thought that there might be something wrong with the carb, so I tore it apart and cleaned it with alcohal. and....
IT STILLWONT START
I've just about given up , so any last ideas before I haul it down to the hobby shop and get some "professional" advice.

-Will
 
what cooling head you install in your engine? I'm asking because i install a nova and the engine doesn't start.i try new glow plug,two shims in the head ,two glow plug gasket,leaning the mixture etc.and no way it run with this head.i put back the stock head and start almost inmediatly. any help ?
 
Ya Bryan I had a big crash and the break peg went through my leg leaving a 2in hole down to the bone. I spent 2 days at the hospital on morphine and now I walk with a huge limp cause I'm sopposed to be usin crutches but I aint.

I have a Golden horizen cooling head, a brand new glow plug, gasket and all the other poop that goes with it. I dont have the stock head anymore. I NEED HELP

Will
 
T-Maxx racer you just answered your own question! You said there is fuel going through the line and you see it moving to the carb,so everything from the carb to the tank/pipe is working. You also said that when you drop fuel into the carb that it will start....so everything from the underside of the carb into the motor is working!......so that means if everything is workin on both sides of the carb(for lake of a better description) then that shows you right there its the carb.

Even though you took it apart and cleaned it,carbs are a touchy little bugger to mess with so it might have a problem that you are not aware of. I would say get a new carb and it should start:bling:

MAXXOVERKILL
 

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