i just got an hpi rush that i traded a psp for i have a problem starting it. its got good compression, fuel is going to the engine, and the glow plug is good. any ideas on what it might be.

it was running the day my cousin got it from his friend he said it is very temperamental some days it will start right away and sometimes it will take 20 minutes. i was thinking it might be the one way bearing.

I do not beleive the one way bearing would keep it from starting some days and not others. If it is the original 15fe motor, then my guess would be the motor is shot. Those motor were ABN motors and wore out a heck of alot quicker than the newer ABC motors. You might also want to check you fuel tank for leaks, maybe even your fuel line. Was the engine properly cared for?

i dont see any leaks and i am not sure weather or not it is the stock engine ill post a pick in a day or few

If it's got good compression then your motor is fine.Is your motor turning over or is it slipping?If it is slipping then I'd say you owb needs a good cleaning or needs replaced.Make sure glow plug is good and glow ignighter is fully charged.Are you priming the motor?

i still cant get to start. could a brand new glow plug heater not be getting the glow plug hot enough

If it does not have a full chrge then yes it could be the problem. Try returning the carburetor to factory settings and charge the glow plug driver over night. Then try again

allright ill try that ill let you kno how that turns out

sometimes even if it is a new plug, it still may be junk. I always use OS plugs and dont really have a problem. The cheaper plugs are just that CHEAP!!! So it is never worth it to go cheap with your plugs, after all it is a key factor in the proper running of your engine. PLease do let me know if there is anything else I can help you with. Best of Luck Brother

i charged it over night and set it back to factory settings and the glow plugs are os. still dosnt run could the glow plugs not be getting hot enough. there is a hole in the pullstart which is also a os but i just noticed that today could that be a problem

I dont think that would be a problem, but it might. Try grabbing the flywheel with your handnad see how easy it is to turn by hand. Should be a hefty pop in it when it comes back down. Have you checked for air leaks?

it easy to turn where is the most likely place for a leak

your flywheel should not be easy to turn over by hand, if it is then your sleeve and piston are getting old. Leaks can happen in the fuel lines, fuel tank or the engine. Take your fuel tank out and blow some compressed aitr into it at a reduce PSI. Take off you fuel lines and plug one end and blow through the other. ANd as far as the engine goes, check that everything is tight, make sure you are properly shimmed in the head and try blowing through the carburetor with the top and bottom of it plugged

if i take the glow plug out and pull the pullstart fuel comes misting out so if the glow plug is good and gas is spraying out the shouldnt it at least start up for a sec or two. ill look to see if there is any leaks tonight

if there is no compression then no it probably wont start, to much air in it. Tale a look tonight at all the possible leaks and we can go from there. What engine is in it again?

idk it was on the truck when i bought it used.
it is an hpi and it has a purple cooling head ill try to get a pix of it and post it

cool cool looking forward to it

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is there no markings on the engine anywere?

it just says hpi on both sides

If you have no compression your wasting your time on this engine.Look on the bay for a new motor 12to18 there are tons of options out there that would make the rush go pretty good.You can get a solid motor for under 100 no problem,won't be the best powerhouse motor but will be decent and easy to tune with good overall reliability.You could rebuild the motor you have but honestly it's not worth it.Good luck and if you need help on picking a motor just pm or post what your looking at.