| Specification | Detail |
| Weight | 160kg (353 lbs) – 164kg (362 lbs) |
| Full Throttle RPM Range | 5000 ~ 6000 |
| Fuel Induction System | EFI |
| Recommended Engine Oil | Yamalube® 4M (See owner’s manual) |
| Engine Type | Inline 4 |
| Displacement | 1.8L |
| Bore x Stroke | 81 x 88.9mm (3.19 x 3.5 in) |
| Prop Shaft Horsepower | 90hp @ 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 |
| Ignition | TCI Microcomputer |
| Spark Plug | LFR6A-11 |
| Starting System | Electric |
| Lubrication | Wet Sump |
| Engine Oil Capacity | 3.2/3.0L |
| 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° |
| Mounting Centers | 26″ |
| Steering Angle (maximum) | 35° from center, either direction |
| Warranty | Limited 3-year Pleasure, 3-year Government, 1-Year Commercial |
Yamaha Midrange 1.8-Liter F90 Outboard Motor
$8,800.00
The all-new 1.8-liter Midrange F90 features greater displacement and a single-overhead-camshaft design with four valves per cylinder. This setup boosts power and volumetric efficiency, streamlines the design, and makes the F90 a leader in torque and acceleration. Weighing only 353 pounds, it is available in 20-inch or 25-inch shaft options and features a powerful 35-amp alternator alongside optional Variable Trolling RPM via the Command Link tachometer.
Key Features
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Enhanced Performance: Built with a larger displacement and a single-overhead-camshaft design boasting four valves per cylinder to lead in torque and acceleration.
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Lightweight & Versatile: Weighs just 353 pounds and comes available in 20” or 25” shaft lengths.
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Power Output: Equipped with a powerful 35-amp alternator.
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Trolling Control: Offers optional Variable Trolling RPM accessible via the Command Link tachometer.
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Shipping & Delivery
Shipping & Delivery
We pride ourselves on offering fast and reliable shipping directly from our warehouse. Most in-stock outboard engines ship within 1–3 business days, ensuring you get your new engine as quickly as possible. Nationwide delivery is available across the U.S., with all engines carefully packaged to prevent damage during transit.
For local customers, we offer the convenience of pickup from our warehouse or local delivery. Our team is happy to assist with loading, and if you need installation or rigging support, we can help with that too.
If you're ordering from outside the U.S., we also offer international shipping. Contact us directly for a customized shipping quote, including rates, timelines, and any additional import details to ensure a smooth delivery to your location.
