Powe r | GREAT LAKES BOATING 53
YAMAHA
Yamaha released its XTO Offshore 425hp four-stroke in
2018 and to say it's their largest outboard would be an understate-
ment. While shaving weight is a top priority for some outboard build-
ers, Yamaha instead focused its efforts on durability.
The naturally-aspirated 5.6L V8 started with a target propeller
size for large offshore fishing boats and the engineers built an outboard
that could spin the bigger prop. To spin a bigger prop you need a
bigger prop shaft, diameter and gears, and much more displacement
in the engine to give you the torque. The average weight depending
on the shaft versions is 976 pounds but when you're pushing 30,000
pounds of boat it's not as big a factor as you might think.
www.yamahaoutboards.com
