2-7
Power unit
Crankshaft
The size of the journals is the same as for the F300B (F300CA) and the amount of overlap between the
crankpins has been increased to ensure sufficient durability for offshore use.
In addition, by increasing the surface area of the thrust bearings and reducing the friction by adding a
surface treatment to the portion that engages the drive shaft splines, the durability in the thrust direc-
tion is increased. By reducing the length of the crankshaft as much as possible, the height of the en-
gine has also been kept low.
Also, the spline portion that engages the drive shaft can be removed and installed, which reduces the
frequency of replacing the crankshaft.
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