I powered my Commander with a 9.9 hp 2 cycle Suzuki from 1988 through 2004. I thought I needed 9.9 hp because the tides outside of Lake Tashmoo on the Vineyard run 3+ knots. However, when it was time to repower in 2005, I wanted a 4 stroke for cleaner operation and couldn't find a 9.9 hp 4 stroke which would fit in the well.

I followed the advice of several posts on this site and repowered with a 6 hp Nissan 4 stroke. The 6 hp Nissan is perfectly adequate motoring against the 3 knot tide, if not quite as fast as the 9.9 Suzuki. In slack tide or opposing a lighter tide, the 6 hp Nissan is as effective as the 9.9 Suzuki.

The 6 hp Nissan is about 25 lbs. lighter than the 9.9 Suzuki, making it much easier to remove from the well, and is noticably more economical than the 2 stroke Suzuki. Its possible to fill two six gallon tanks and go through a whole season without refueling. And I don't miss the 2 stroke smoke.

The Nissan can also be swiveled 180 degrees to provide optimal reverse thrust. It also has an attachment which allows you to pull the starter cord up vertically instead of out horizontally - althought this is a preference rather than a clear benefit.

Features that the 6hp Nissan lacks include an electric starter and a rectifier to charge the battery.

MRH