new to the nitro world

[joe energy]

Hey yall I got a nitro car last year used sat for 6 months so a month ago I got it started but it was just reving hella high and the tires were spinning but when I went to hit throttle it just die I've been looking on youtube how to set needles but I can't figure it out so now I'm just trying to get it started the pull starter was really hard to pull and it broke so now I gota try and put it back together but I need help in finding out what the factory settings are for all the needles and stuff cus there all messed up the motor is a xtm 18 idk what kind of nitro car it is everything says xtm so ya please help

 

[ninnon]

We'd need pics to identify the car. Sound like you broke the pull start from over priming, and if the wheels are spinning when not touching the throttle then you have the idle set too high. To fix this, take off the air filter and adjust the idle needle until a 1-2mm gap can be seen, make sure that the throttle trim is at middle before you do this. With the other needles, set them so that they are flush with the sides and start tuning from there. Here's a great guide on tuning:
https://www.rcnitrotalk.com/forum/threads/nitro-tuning-tips-and-tuning-flow-chart.60832/
And here's one you should read for some background information on Nitro RC:
https://www.rcnitrotalk.com/forum/threads/nitro-rc-beginners-guide.68224/
Hope it helps

 

[olds97_lss]

For what it's worth, here's a link to a manual for a XTM 18:
http://media.globalhobby.com/manual/146003.PDF

Looks like they are talking about a rotary carb, so not sure if the settings are the same for the slide carb. 3 turns from bottom on the HSN, LSN is 5 turns out from fully screwed in (make sure to hold the carb at WOT before screwing in the LSN to avoid seat/needle damage).

 

[joe energy]

We'd need pics to identify the car. Sound like you broke the pull start from over priming, and if the wheels are spinning when not touching the throttle then you have the idle set too high. To fix this, take off the air filter and adjust the idle needle until a 1-2mm gap can be seen, make sure that the throttle trim is at middle before you do this. With the other needles, set them so that they are flush with the sides and start tuning from there. Here's a great guide on tuning:
https://www.rcnitrotalk.com/forum/threads/nitro-tuning-tips-and-tuning-flow-chart.60832/
And here's one you should read for some background information on Nitro RC:
https://www.rcnitrotalk.com/forum/threads/nitro-rc-beginners-guide.68224/
Hope it helps

So I took glow plug out and the pullstarter is off when piston hits tdc is hit supposed to be real hard to almost impossible to turn bolt by hand

So I took glow plug out and the pullstarter is off when piston hits tdc is hit supposed to be real hard to almost impossible to turn bolt by hand

 

[olds97_lss]

So I took glow plug out and the pullstarter is off when piston hits tdc is hit supposed to be real hard to almost impossible to turn bolt by hand

If the engine is relatively new, it can be pretty difficult to rotate the crank fully. How are you trying to turn it? By using the flywheel or trying to spin the shaft with your fingers? It should turn fully when using the flywheel for grip/leverage, but can be difficult when it gets to the top of the stroke.

Unlike a floating ringed engine (most other engines on the planet use rings as a seal), these engines have a tapered cylinder. From the top of the exhaust port on up, it tapers to seal the combustion room. When your engine is at 200F+ in temp, the cylinder expands enough to where the piston fits tight enough to seal, but after break in, not tight enough to bind. Over time, the piston wears down and you begin losing excess compression and then get tuning issues, flame outs for no reason, hard/impossible to start when hot... This is why you never really want to turn over an RC engine when it's cold unless your starting it, or testing for pinch, or some other trouble shooting reason.

 

[ninnon]

So I took glow plug out and the pullstarter is off when piston hits tdc is hit supposed to be real hard to almost impossible to turn bolt by hand

As olds97 said, how are you trying to turn the engine over- the engine shouldn't totally lock at all...