Power & Performance
A proven 16-valve DOHC In-Line design, with four valves per cylinder maximizes efficiency and power. It also streamlines design.
Precision Multi-Point Electronic Fuel Injection and long-track intake system combine to maximize power and fuel efficiency across the line of In-Line Fours.
With up to 50-amp alternators, our In-Line Fours provide plenty of power for a range of electronics, which comes in handy, now that they’re all compatible with digital controls.
A 10mm Offset Crankshaft allows for larger intake volume design. Four tuned intake tubes boost torque in low and mid-speed ranges for quick acceleration.
The Composite Intake Manifold is a lightweight, compact design, making these engines very versatile. Long Tube Intake Tracks are tuned to increase airflow, boosting low-end and midrange torque. This means a more powerful hole shot and increased acceleration. Even with all this responsive power, an air silencer box and surge tank reduce air intake noise and air turbulence for smoother operation.
Convenience & Control
Repower Ready
26-inch mounting centers and a bolt pattern that matches previous two strokes make In-Line Fours flexible for most repowers.
Variable Trolling
Our entire I-4 series has a user adjustable trolling speed. This allows for precision adjustment of trolling in 50-RPM increments when equipped with a Yamaha digital gauge. Trolling range varies based on model.
Extended Trim
Extended Trim Range delivers better acceleration-to-plane and top-end speed. The tilt range is a full 70° for tilting the engine above the waterline.
Easy Engine Flushing
A Freshwater Flush Device allows you to flush the engine without running it, for added convenience and extended engine life.
Quieter Operation
Yamaha’s Shift Dampener System greatly reduces the noise commonly associated with shifting gears. Using a special design and components, much of the force of shifting is absorbed, resulting in far quieter and smoother operation.
Specs & Compare
| Engine Type | Inline 4 |
| Displacement | 2.7L (Mechanical) / 2.8L (DEC) |
| Bore x Stroke | 94 x 96.2 (3.70 x 3.79in) – 96 x 96.2mm (3.78 x 3.79in) |
| Prop Shaft Horsepower | 150hp @ 5500 rpm |
| Full Throttle RPM Range | 5000 ~ 6000 rpm |
| Alternator Output at W.O.T. | 35 – 50 Amp |
| Compression Ratio | 9.0:1 & 10.3:1 |
| Fuel Induction System | EFI |
| Max Output | 110.3KW |
| Recommended Fuel | Octane 87 & Octane 89 |
| Recommended Engine Oil | Yamalube® 4M |
| Recommended Fuel Filtration | Water Separating Filter (external) |
| C.A.R.B. Rating | 3-Star |
| Exhaust | Through Propeller |
| Intake | 16 |
| Ignition | TCI Microcomputer |
| Spark Plug | NGK-LFR6A-11 & LFR5A-11 |
| Alternator Output | 35 – 50 Amp |
| Starting System | Electric |
| Lubrication | Wet Sump |
| Engine Oil Capacity | 4.5L/4.3L |
| Recommended Cooling | Thermostatic Control |
| Ethanol Blend Limit | 10% Maximum |
| Gear Ratio | 2.00:1 |
| Gear Shift | Forward, Neutral, Reverse |
| Shaft Length | 20″ – 25″ |
| Degree of Tilt | 70° |
| Degree of Trim | -4° through +16° |
| Dry Weight | 217kg – 222kg |
| Mounting Centers | 26″ |
| Steering Angle (maximum) | 32° from center, either direction |
| Warranty | Limited 3 Year – 1 Year Limited Commercial |
| Engine Type | Inline 4 |
| Displacement | 2.8L |
| Bore x Stroke | 96 x 96.2mm (3.78 x 3.79in) |
| Prop Shaft Horsepower | 200hp @ 5500 rpm |
| Full Throttle RPM Range | 5000 ~ 6000 rpm |
| Alternator Output at W.O.T. | 50 Amp |
| Compression Ratio | 10.3:1 |
| Fuel Induction System | EFI |
| Max Output | 147.1KW |
| Recommended Fuel | Octane 89 |
| Recommended Engine Oil | Yamalube® 4M |
| Recommended Fuel Filtration | Water Separating Filter (external) |
| C.A.R.B. Rating | 3-Star |
| Exhaust | Through Propeller |
| Intake | 16 |
| Ignition | TCI Microcomputer |
| Spark Plug | NGK-LFR6A-11 |
| Alternator Output | 50 Amp |
| Starting System | Electric |
| Lubrication | Wet Sump |
| Engine Oil Capacity | 4.5L/4.3L w/without filter |
| Recommended Cooling | Thermostatic Control |
| Ethanol Blend Limit | 10% Maximum |
| Gear Ratio | 1.86:1 |
| Gear Shift | Forward, Neutral, Reverse |
| Shaft Length | 20″ – 25″ |
| Degree of Tilt | 70° |
| Degree of Trim | -4° through +16° |
| Dry Weight | 220 kg – 221 kg |
| Mounting Centers | 26″ |
| Steering Angle (maximum) | 32° from center, either direction |
| Warranty | Limited 3 Year Limited – 1 Year Limited Commercial |