4.2L V6 300 HP
4.2L V6 300 HP
Outboard
Overview
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 Type | V6 |
| Displacement | 4.2L |
| Bore x Stroke | 96 x 96mm (3.78 x 3.78 in) |
| Prop Shaft Horsepower | 300hp at 5500 rpm |
| Full Throttle RPM Range | 5000 ~ 6000 rpm |
| Alternator Output at W.O.T. | 50 - 70 Amp |
| Compression Ratio | 10.3:1 |
| Fuel Induction System | EFI |
| Weight † | 250 kg (551 lbs) / 254 kg (562 lbs) / 265 kg (588 lbs) |
| Recommended Fuel | Octane 89 |
| Recommended Engine Oil | Yamalube® 4M (See owner's manual) |
| Recommended Fuel Filtration | Yamaha 10-Micron Fuel / Water Separating Filter (external) |
| C.A.R.B. Rating | 3-Star |
| Exhaust | Through Propeller |
| Intake | 24 |
| Ignition | TCI Microcomputer |
| Spark Plug | LFR6A-11 |
| Alternator Output | 50 - 70 Amp |
| Starting System | Electric |
| Lubrication | Wet Sump |
| Engine Oil Capacity | 6.3L/6.0L |
| Recommended Cooling | Thermostatic Control |
| Ethanol Blend Limit | 10% Maximum |
| Gear Ratio | 1.75:1 |
| Gear Shift | Forward, Neutral, Reverse |
| Shaft Length | 25" - 30" - 35" (F300 DEC Only) |
| Degree of Tilt | Mechanical 67°, Digital Electric Steering 69°, Bolt-on steering 70° |
| Degree of Trim | -3° through +16° |
| Dry Weight with built-in DES | 25" shaft 277 kg (611 lbs), 30" shaft 283 kg (624 lbs), 35" shaft 288 kg (635 lbs) |
| Dry Weight without built-in DES | 25" shaft 255 kg (562 lbs), 30" shaft 261 kg (575 lbs), 35" shaft 265 kg (588 lbs) |
| Dry Weight with Mechanical Controls | 25" shaft 255 kg (562 lbs) |
| Mounting Centers | 28.5" |
| Steering | Integrated, Electric Actuation |
| Steering Angle (maximum) | 32° from center, either direction |
| Warranty | Limited 3-Year Pleasure, 3-Year Government, 1-Year Commercial |
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