[Sago]

Hey people. I haven't been into Nitro RCS since I was a kid. A friend of mine gave me 3 Nitro trucks that are in bad shape and neglect. One of them is FUBARed but one of them I am trying to get to working condition.

It's a Traxxas of a kind I am not sure exactly but it's either a Revo 2.5 or a Slayer 4x4.
I will have a picture down below.

So I've got the receiver and transmitter working and as far as I can tell all the servos seem to be in good working order.

I was also given some fuel but no glow plug igniter. I rigged up a spare 7.2V 1500mah batter and hooked it up to the glow plug and grounded it on the bottom of the chasis and I could not get it to work. Outside of the engine I tested the 3 glow plugs I had and all 3 of them ignited for a second and no more.

Also the engine doesn't have a proper air filter and when I primed the engine I noticed that the fuel didn't stay in the line but receded back to the tank.

I apritiate any and all help.

Thanks alot in advance.

[floyd]

I don't know much about engines in cars or trucks but most glow engines only take 1.5 volts on the glow plug. Any higher and it burns out the plug. If the carb needle is open too much or not enough the fuel may go back down the line. Or the lines could be reversed. Cheers Floyd

[davidmc36]

Originally Posted by Sago

....7.2V....

Yup, as Floyd said, you burned out all your glo plugs.

As far as the fuel going back to the tank, maybe it just will not stay in the line until you get the engine running a bit and all the air pockets pushed through the line.

Can you google up any manual for the engine to see what basic settings are for needle valves?

How old is the fuel? Could it have sat around and absorbed water?

PM me your address and if the Post Office does not go on strike I can send you a Glo Igniter I don't use that I inherited in a goodie box.

[Cougar429]

I too have to agree. A standard portable glow starter uses a single 1.5V NiCad or NiMH battery.

There is another thing you will likely run into. I find with most cases where an engine has been first run after mounting from the box, replacement of parts or even after long storage: The internal bits will need to seat in and that means microscopic particles of metal wear off as everything seats, (again). Those bits impinge on the glow wire and can damage the filament, compromise how it catalyzes the fuel or destroy it completely. Vibrations can do the same.

What this means is you are very likely to wipe out at least one glow plug during that time so best keep extras. If you find it difficult to start later or finicky to tune then you should pull the plug and replace it. It may heat with the battery, but will die immediately when that heat is removed.

On that note, it would be a good idea to pull the fuel tank and remove the internals for cleaning. Old fuel can congeal and harden.

Same thing with the carb needle. Most often I find bits of dried lube or foreign matter plugging the fuel inlet fitting or spray bar. An easy check is to at least remove the High Speed needle near it and flush the system with fresh fuel.

[Sago]

Morning guys. Thanks so much for the helps so far.
So I added a few more pics. The last one is of the 3.3 engine with EZ start, I do not have the wand for the EZ Start but I will be ordering parts online later next week. I was thinking of pulling the EZ start from the 3.3 and installing it on the 2.5, any toughts?

As for the engine specs I am confident it's a Traxxas 2.5 found in the Revo but not a 100%, still waiting on traxxas customer service to get back to me.

And yes the fuel I have is old, but it looks to be in proper form, not sure how long nitro fuel is spose to last.

I plan on taking apart and cleaning most of the parts, but like I said I won't be ordering parts until next week.

Any of your suggestions are welcomed.

Thanks again

Cheers

[Sago]

Haven't cleaned the exhaust yet, but the seals are all busted. It's a LogicsRD exhaust, any idea where I would be able to find new seals for it?

[Hubert 1]

Nitro fuel lasts some time, but it has to be stored properly. If it was open, or left in a garage, it is likely bad.

Taking everything apart is not a bad idea, that way you will get to see if anything is broken, and will be more familiar with your trucks. You couds also take the carb off and clean it. If it has dirt inside it, then there is likely dirt inside the engine. If the carb is clean, I wouldn't pull the engine apart.