On Wed, 13 Jun 2007 09:55:58 -0500, dt wrote:

4HP and it weighs less than five pounds? Why AREN'T we using them for
outboards???

8,000 RPM without a proper lubrication system or cooling is not going
to last very long. That thing is putting out about 5 hp per cubic
inch which is comparable to a drag racing engine designed for 6 second
bursts at full power.