i bought a balsa usa kit that the engine is mounted up side down. what is a good .46 2 stroke engine that is good for this. i have not had good luck keeping them idle up side down.

They all run fine when mounted in any way when properly tuned. Also take care in locating tank so center of tank is even with or slightly (1/2") lower than spray bar.

If you use a well-broken in and properly-tuned O.S. max .46 AX engine, you'll have no difficulties.

<br type="_moz"/>