Yamaha Midrange 1.8-Liter F90 Outboard Motor
$8,800.00
Yamaha F90 for sale, a 1.8L inline-four midrange outboard delivering 90 HP at 5,500 RPM at the propeller shaft, with EFI fuel induction, electric start, and a 20″ or 25″ shaft. Backed by Yamaha’s limited warranty program.
Yamaha F90 for sale, a 1.8-liter midrange outboard engineered for reliable performance, delivering 90 HP at 5,500 RPM at the propeller shaft.
Yamaha F90 Engine Specifications
This engine is an Inline 4 design with 1.8L displacement and a bore x stroke of 81 x 88.9mm (3.19 x 3.5in). It uses Electronic Fuel Injection (EFI), a compression ratio of 10.0:1, and runs on 87 octane recommended fuel with a maximum ethanol blend of 10%. Full throttle RPM range is 5,000–6,000 RPM, intake is 16-valve, and the engine carries a C.A.R.B. 3-Star emissions rating.
Yamaha F90 Electrical, Ignition, and Lubrication
Ignition is handled by a TCI microcomputer system with an LFR6A-11 spark plug, and starting is electric. The alternator delivers 35 amp output at wide-open throttle. Lubrication is a wet sump system using Yamalube 4M recommended engine oil, with an oil capacity of 3.2L / 3.0L. Cooling is thermostatically controlled, and recommended fuel filtration is a Yamaha 10-micron fuel/water separating filter (external).
Yamaha F90 Shaft, Steering, and Mounting
The F90 is available in 20″ or 25″ shaft lengths, with a gear ratio of 2.15:1 and forward-neutral-reverse gear shift. Maximum steering angle is 35° from center in either direction. Degree of tilt is 70°, and mounting centers measure 26 inches. Exhaust routes through the propeller, and total weight ranges from 160 kg (353 lbs) to 164 kg (362 lbs).
| Specification | Detail |
|---|---|
| Weight | 160 kg (353 lbs) – 164 kg (362 lbs) |
| Full throttle RPM range | 5000–6000 RPM |
| Fuel induction system | EFI |
| Recommended engine oil | Yamalube 4M |
| Engine type | Inline 4 |
| Displacement | 1.8L |
| Bore x stroke | 81 x 88.9mm (3.19 x 3.5in) |
| Prop shaft horsepower | 90 HP at 5500 RPM |
| Alternator output at W.O.T. | 35 Amp |
| Compression ratio | 10.0:1 |
| Recommended fuel | Octane 87 |
| Recommended fuel filtration | Yamaha 10-micron fuel/water separating filter (external) |
| C.A.R.B. rating | 3-Star |
| Exhaust | Through propeller |
| Intake | 16-valve |
| Ignition | TCI microcomputer |
| Spark plug | LFR6A-11 |
| Starting system | Electric |
| Lubrication | Wet sump |
| Engine oil capacity | 3.2L / 3.0L |
| Recommended cooling | Thermostatic control |
| Ethanol blend limit | 10% maximum |
| Gear ratio | 2.15:1 |
| Gear shift | Forward, Neutral, Reverse |
| Shaft length | 20″ – 25″ |
| Degree of tilt | 70° |
| Degree of trim | -4° through +66° (as stated in source; see flag below) |
| Mounting centers | 26″ |
| Steering angle (maximum) | 35° from center, either direction |
| Warranty | Limited 3-Year Pleasure, 3-Year Government, 1-Year Commercial |
Contact us today to secure this Yamaha F90, backed by Yamaha’s limited multi-tier warranty.
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