Assuming you're asking about Yamaha outboard engines, a 2 stroke Yamaha 40 weighs about 190 pounds while a 4 stroke Yamaha 40 weighs about 220 pounds.
Mine, with electric start and manual tilt, weights 160lbs.
a 2009 Yamaha warrior weighs in at 396lbs
70 kg
My 2006 yamaha R1 weighs around 870 lbs.
450
275lbs
188 Kg
The Yamaha RT100 weighs approximately 178 pounds.
538 lbs.
depends on how much you weigh.
Rated 40 out of the box
88.1849049 pounds