help model car woes (again)

[andytk]

Arrrggg.

Its this bloody remote controlled car again.
If any of you remember it from the first time round:
www.pistonheads.com/gassing/topic.asp?t=11801&f=23&h=0&hw=model+car+clutch

The ripcord starter unit has broken again. And it won't run right either.

Once you do get it started it will run. But when you apply full throttle it runs for about 5 seconds and then dies.
I can't figure it out at all. I've run it lean, I've run it rich, I've tried every tuning option I can think of and it still keeps quitting at full throttle.
Can anyone help.
Do you reckon the engine has something wrong with it?

Also the ripcord unit seems to have somehow filled up with oil and become gummed up. When you pull it out it won't retract in again. So I took it off and cleaned it. Now its back on it doesn't work. I think I mangled the cheap plastic parts when I refitted it.

Arggg, I hate little fiddley things.
Model aeroplanes are so much easier to work on.

Can anyone help.

Andy