Hi,

I have recently bought one of these engines and its driving me nuts. The 1st problem was that it had a head gasket/shim missing. Having sorted that, I'm running with a perry pump but the 1/2 to full throttle pickup is lousy - takes around 5 to 10 seconds to get going. Idle is spot on - it will keep going until the fuel runs out, as it the top end (once it gets going). Low to 1/2 throttle is also OK. I can't seem to do anything to get the pickup sorted in the upper range. Fuel used is 5% nitro, 20% castor. The engine also seems quite sensitive to the low end needle setting, but very insensitive to the high end setting (when richening up).

I have set up many engines before without this sort of problem, and have a TT46 pro which is excellent.

Has anyone got any ideas?

Mark