G'day I've been thinking about your dead sticks. A really rare problem that can lead to lots of dead stick landings is a blocked muffler pressure fitting. As your engine was sitting for several years, it is possible that fuel has dried in the muffler fitting and if this is the case, the engine will start and run as you tune it and then gradually run leaner as a vacuum forms in the tank as the fuel is used up. Eventually the engine can't suck fuel anymore and it stops.

Your problem, as Bogbeagle said, is almost certainly a fuel supply problem.

Try this. Fill the tank, disconnect the fuel line at the engine and blow on the end of the muffler. If all is OK, you should blow a stream of fuel out of the fuel line. Watch out that you don't blow too hard or the fuel may blow back into your mouth. It tastes horrible. I suspect that the engine is basically OK.

On a related but different subject, I have recently converted a couple of models to electric power. It is really convenient, no starting, no tuning and just works. I really love my glow engines but I must admit, I am flying the electric models more often, especially when I just want to grab a model and go for a quick fly. My most recent conversion is of a large trainer - a Sig Kadet Senior - which now has a Turnigy Easy Match 46 size 550kV motor, 60 Ampere Speed Controller (it really only needs about 30 Ampere one), a 13 x 8 prop and a 5000 mAh 4 cell battery. It flies very similar to the way it did with a Saito 90R3 3 cylinder radial, but with more power (the radial is not very powerful for its size). I am really enjoying it. This electric setup will work well in just about 40 size model of medium performance.

Cheers

Mike in Oz