Wick, the Maloney should turn a 15x8 at 7,200 and will run forever on a small amount of gas. It is better than people give it credit. It has needle bearings on the rod so doesn't need much oil in the gas. A 16x6 will work well on it too but John Maloney did all the testing on it with a 15x8. The mag is weak so must be started with a starter.