Raptor 60- air in fuel line

[drsimonturner]

Dear All

Have just purchased a s/h rappy 60 with tt pro70h engine and standard TT muffler. Have a rappy 30 already and could not pass this one up as v cheap. Having spent a few hours getting it flyable, I now have a problem. The clunk line appears intact as do all the fuel lines, but air is getting into the fuel line ot the carb and so the thing just stops. Also feels a lot hotter than the 30 after a hovering test flight.

Any ideas? I have checked all the things I can think of. The 70 proH is obviously an old engine now and does not even have a low speed mixture needle. If I was to replace this should I go for an OS81? I do not want to spend the money on all the conversions a 90 engine would require.

Cheers

S