Yamaha can't be considered because their engines are too heavy in the protable
range. They've focused more on their big engine technology and lag behind
Merc/Nissan/Honda.

RB

Yamaha F4 - 4 HP, 38 pounds

Not for the 4 cycle, which is what I'd prefer. 4HP is 48 lbs and the 6 is 83LBs
compared to Nissan's 55.

http://www.yamaha-motor.com/products...c=otb&cid=19&s
cid=5&but=19&year=2005&cat=Four+Stroke+Series&scat =Portable

RB