4.2L V6 300 HP

4.2L V6 300 HP


Our 4.2-liter F300 is a reliable, offshore favorite—and it's only getting better. It now features a fresh, new cowling design (with stern light if rigged with Helm Master® EX), new integrated digital electric steering*, rerouted exhaust for enhance reverse thrust and is available in Yamaha gray or pearlescent white. It’s destined to be a top choice offshore for years to come.


  • Compatible with mechanical (25” shaft) or digital controls including new Helm Master® EX
  • Recommended fuel: 89 Octane
  • Shaft lengths available: 25”, 30” and 35” (30" and 35” on F300 DEC only)
  • Alternator output: up to 70 amp


*Mechanical F225, F250, and F300 models remain unchanged. 4.2L V6 Offshore 225 compatible only with bolt-on digital electric steering.

Engine TypeV6
Bore x Stroke96 x 96mm (3.78 x 3.78 in)
Prop Shaft Horsepower300hp at 5500 rpm
Full Throttle RPM Range5000 ~ 6000 rpm
Alternator Output at W.O.T.50 - 70 Amp
Compression Ratio10.3:1
Fuel Induction SystemEFI
Weight †250 kg (551 lbs) / 254 kg (562 lbs) / 265 kg (588 lbs)
Recommended FuelOctane 89
Recommended Engine OilYamalube® 4M (See owner's manual)
Recommended Fuel FiltrationYamaha 10-Micron Fuel / Water Separating Filter (external)
C.A.R.B. Rating3-Star
ExhaustThrough Propeller
IgnitionTCI Microcomputer
Spark PlugLFR6A-11
Alternator Output50 - 70 Amp
Starting SystemElectric
LubricationWet Sump
Engine Oil Capacity6.3L/6.0L
Recommended CoolingThermostatic Control
Ethanol Blend Limit10% Maximum
Gear Ratio1.75:1
Gear ShiftForward, Neutral, Reverse
Shaft Length25" - 30" - 35" (F300 DEC Only)
Degree of TiltMechanical 67°, Digital Electric Steering 69°, Bolt-on steering 70°
Degree of Trim-3° through +16°
Dry Weight with built-in DES25" shaft 277 kg (611 lbs), 30" shaft 283 kg (624 lbs), 35" shaft 288 kg (635 lbs)
Dry Weight without built-in DES25" shaft 255 kg (562 lbs), 30" shaft 261 kg (575 lbs), 35" shaft 265 kg (588 lbs)
Dry Weight with Mechanical Controls25" shaft 255 kg (562 lbs)
Mounting Centers28.5"
SteeringIntegrated, Electric Actuation
Steering Angle (maximum)32° from center, either direction
WarrantyLimited 3-Year Pleasure, 3-Year Government, 1-Year Commercial

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