superjimis

Hi,i've got a GXR15 engine and it has some problems.when i got in my LHS the owner said me that the engine has low compression and the pullstarter is pulled very easy.second the engine becomes very hot so hot that the engine's head becomes purple from blue.third i must change 2-3 glow plugs every litre(i use novarossi glow plugs).how can solve these problems? do i need to change the engine?

thanks.

turbodremz23

My Feedback: (16)

it needs to be retuned, and I would suggest a new piston/sleeve...or just go with an OS engine

what kind of temps are you running that its changing the color of the head? 280+?

superjimis

i don't know what temps i am running bacause i don't have a thermometer but i am that my engine runs hot.i forgot to say that my engine can't run for more than 1/3 of the tank and when it shuts down i can't start it,i must wait untill it cool down.i have it only one year and it hasn't run more than 2.5 gallons.

superjimis

the fuel-air mixture is quite rich.

all-out

sounds like you haven't broken it in or changed the settings

oneofakindtrini

damm. i have ever heard of a problem that caused the engine head to turn from blue to purple. you have to be running extremely high temps. you sleeve can be bad, your tune can be terribly bad.

superjimis

no i break in the engine and i have tune it.in the first 1.5 gallon there isn't any problem.after the second gallon started theese problems.

all-out

i suggest taking it in then
cause thats insane

oneofakindtrini

did you even disassemble the engine, like take out the sleeve.

superjimis

No.

Foxy

You have an air leak, it has ruined your engine. Get another one. It's no big loss, those Kyosho engines are not very good. The excessive heat (must have been well over 150C) has damaged the piston and sleeve, that's why there is no compression any more. There is nothing you can do about theis now, unless you get a new piston, sleeve and probably conrod and bearings too.

Get a good engine and a temp gun, and if you ever see it getting over 300F or 150C, shut it off immediately.

superjimis

tomorrow i will buy a temp gun and then a new 12 size engine .