nitro engine problem

[mitch12]

hi the problem i have is this i am new to nitro engines and dont rearly now what i am do so here go's
i had to take the engine apart fully (thought the piston had gone) having put back together the problem is that it starts and then dies all the pipes are on and doing there job if i start the engine and keep pressing the faul tank primer the engine will run even when i rev it up but as soon as i stop it stops the pipe from the exshout is priming the tank as it should but it wont run if i dont prime it with the primer the tank has no air leaks as i have done a pressure test on it all seals have been renew.
all help with meny thanks
mitch12

 

[Candyman]

Check your carburetor settings. It sounds like the engine isn't getting enough fuel. So I expect either your needle settings are off which is choking the fuel flow, or your pressure line from the pipe is off and not helping push the fuel in.

https://www.rcnitrotalk.com/forum/showthread.php?t=7217&highlight=beginners
http://www.rchobbies.org/cars_eng-tuning.htm

A couple links to help you understand tuning these engines...

 

[mitch12]

engine prob

thankyou for the link i have found out that i have got a score mark on the piston linning so it looks like i have killed it and will have to get new parts for it somthing must have got in after i put it back together or somthing got in with the petrol no idea uke:

 

[hpiracing1123]

yea i agree with candyman