Price upon request


Key features

Even more charging power: using phase angle control (pac), which adjusts the intensity of the stator’s magnetic field, xto offshore 450 models produce up to 96 net amps per engine in neutral. The new xto offshore provides more power for today’s popular on-board, high-demand devices like gyro stabilizers, air conditioning, sound systems, and more, all while keeping starting batteries constantly charged.
Highest compression ratio in an outboard: get more “bang” from every spark with a 12.2:1 compression ratio: better efficiency, more power and incredible throttle response.
Plasma-fused sleeveless cylinders: this micro-textured surface is 60 percent harder than steel, yet significantly lighter and thinner, increasing displacement without increasing the size of the powerhead. Other benefits include reduced friction, faster heat transfer and improved fuel economy.


Engine type: 32-valve v8 four stroke
Displacement: 5.6-litre (5559 cc) / 339.2 ci
Bore & stroke: 96 x 96 mm (3.78 x 3.78 in)
Rpm range: 5000-6000 (full throttle) 600-1000 (variable trolling)
Compression ratio: 12.2:1
Induction system: dohc, 4 valves per cylinder
Alternator output: 96 amps net (per outboard, stackable)
Fuel delivery: direct injection
Starting electric: w/ ptt
Ignition: tci microcomputer
Lubrication: wet sump
Exhaust: through propeller (except in reverse under 2500 rpm)
Cooling: thermostatic control, water
Gear shift: f-n-r
Gear ratio: 1.79:1 (25/14)
Weight: 25” = 437kg / 963lbs. 30” = 448kg / 988lbs

Fuel & lubrication

Recommended fuel: regular unleaded (minimum pump octane 89)
Recommended oil: yamalube marine lower unit/Gear lube hd
Oil capacity: 7.8l (8.2 qt) – with filter/ 7.5l (7.9 qt) – without filter
Additional information