Model feature
2-2
Model comparison table
400- and 450-horsepower 4-stroke models have been newly added to the Yamaha outboard motor
lineup.
The engine output powers of 400- and 450-horsepower models are controlled by their respective
ECMs. Electricity generating capacity of 450-horsepower model is different from that of 400-horse-
power model. The generator output and the charging capacity are also different.
Appropriate wiring is required for the battery charging system. 400-horsepower model cannot be up-
graded to 450-horsepower model.
F400A/FL400A/XF400 F450A/FL450A/XF450
Type 4-stroke DOHC V8 32 valves
Total displacement
5559 cm
³ (339.2 c.i.)
Bore
× stroke 96.0 × 96.0 mm (3.78 × 3.78 in)
Compression ratio 12.3:1
Maximum generator output 104 A 102 A
Maximum charging capacity 88 A 96 A
Rated power 294.2 kW (400 hp) 331.0 kW (450 hp)
Full throttle operating range
5000
–6000 r/min
Maximum fuel consumption at 6000 r/min
(reference data)
130.6 L/h 144.8 L/h
Idle speed (in neutral)
650
–750 r/min
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