Campy:

It will sound fatuous for me to say it, but you have missed something in your checks.

Open the HS needle another four turns and ipen the throttle all the way. Then with fuel in the tank pit your finger over the engine's air intake.

Without glow heat turn the engine by hand, keeping the intake blocked with your finger.

Either of two things will happen; the engine will pull fuel or it will not.

If it pulls fuel you had the main needle too lean for the new installation. Start the engine and set it as needed.

If it doesn't pull fuel there are still two possibilitiesx.

Leave the throttle wide open, put a length of fuel line on the carb fuel nipple and see if you can blow through it. If you can not blow through it the carb has a blockage, you missed it in your earlier checks.

If you can blow through the carb, again two possibilities.

Connect the end of the hose that went to the carb to the lline from your fuel pump, just "Bump" the pump in reverse. It should immediately fill the fuel line, and after stopping the pump fuel should remain in the line. If it does not pull fuel immediately, or if the fuel runs back to the tank, you have a leak in the tank or hoses. If it pulls fuel and the fuel stays in the line you have an engine problem.

If you are down to this point and there really is no external leak on the engine, pull it off the plane and place it in the trash can. You've probably been bitten by the famous OS ABN liner peeling syndrome.

Actually, if it has peeled and you want to keep the OS, order the piston and liner set for the Magnum XLS 46 from Hobby People, it's true ABC and it drops into the 46 FX. But the p/l set is almost $40 and the complete engine is $70, in my opinion it's better to toss the OS and get the complete new Magnum.

Hope at least some of this will help.

Bill.