2027 Yamaha Four Stroke Midrange 1.8L F90LB
Description
Meet the midrange outboard that loves doing a little bit of everything: the 2027 Yamaha Fourstroke F90LB in classic Yamaha Gray. This is an engine-only listing—perfect for repowering a favorite rig or building out a fresh setup with a proven 90-horse platform.
At the heart of this outboard is Yamaha’s 1.8L (1832cc) in-line 4-cylinder powerplant with 16 valves (SOHC, 4 per cylinder). Translation on the water: smooth, confident power delivery that feels right at home on the transoms that typically pair with a 90—think compact to mid-size fishing boats, bay boats, pontoons, and utility hulls that benefit from strong midrange pull without stepping up into heavier horsepower classes. With 90 bhp (67.2 kW) at 5500 RPM and a full-throttle range of 5000–6000 RPM, it’s tuned to run comfortably where most boaters actually spend their day.
Fuel economy matters when you’re putting in real miles, and this Yamaha is built to cruise efficiently with fuel injection and the ability to run on regular gas. The 2.15:1 gear ratio helps convert that horsepower into practical push—useful for getting on plane with authority and holding speed without feeling “busy” at the helm.
It’s also ready for the realities of life around docks and tidal ramps. The water (open loop) cooling system and salt water capability make it a strong candidate for coastal use, while the visual/audible engine alert system and emergency RPM reduction add peace of mind when conditions—or maintenance schedules—don’t go perfectly.
Rigging and usability are straightforward: a 20-inch shaft matches a wide range of transoms, electric start keeps launches simple, and power trim plus remote steering control let you dial in running angle for changing loads and water conditions. Need reliable onboard power for accessories? You’ve got a 35-amp alternator on tap.
With a dry weight of 353 lbs (160 kg), the F90LB hits a sweet spot: substantial enough to feel planted, yet well within the comfort zone for many popular hulls in its class. If you’re after clean Yamaha Gray looks, crisp four-stroke manners, and a capable 90 that’s designed to be the dependable centerpiece of your setup, this F90LB is ready to get bolted on and put to work.
Color Options
Pricing
Engine
Drive Line
Steering
Meet the midrange outboard that loves doing a little bit of everything: the 2027 Yamaha Fourstroke F90LB in classic Yamaha Gray. This is an engine-only listing—perfect for repowering a favorite rig or building out a fresh setup with a proven 90-horse platform.
At the heart of this outboard is Yamaha’s 1.8L (1832cc) in-line 4-cylinder powerplant with 16 valves (SOHC, 4 per cylinder). Translation on the water: smooth, confident power delivery that feels right at home on the transoms that typically pair with a 90—think compact to mid-size fishing boats, bay boats, pontoons, and utility hulls that benefit from strong midrange pull without stepping up into heavier horsepower classes. With 90 bhp (67.2 kW) at 5500 RPM and a full-throttle range of 5000–6000 RPM, it’s tuned to run comfortably where most boaters actually spend their day.
Fuel economy matters when you’re putting in real miles, and this Yamaha is built to cruise efficiently with fuel injection and the ability to run on regular gas. The 2.15:1 gear ratio helps convert that horsepower into practical push—useful for getting on plane with authority and holding speed without feeling “busy” at the helm.
It’s also ready for the realities of life around docks and tidal ramps. The water (open loop) cooling system and salt water capability make it a strong candidate for coastal use, while the visual/audible engine alert system and emergency RPM reduction add peace of mind when conditions—or maintenance schedules—don’t go perfectly.
Rigging and usability are straightforward: a 20-inch shaft matches a wide range of transoms, electric start keeps launches simple, and power trim plus remote steering control let you dial in running angle for changing loads and water conditions. Need reliable onboard power for accessories? You’ve got a 35-amp alternator on tap.
With a dry weight of 353 lbs (160 kg), the F90LB hits a sweet spot: substantial enough to feel planted, yet well within the comfort zone for many popular hulls in its class. If you’re after clean Yamaha Gray looks, crisp four-stroke manners, and a capable 90 that’s designed to be the dependable centerpiece of your setup, this F90LB is ready to get bolted on and put to work.
Color Options
Pricing
Engine
Drive Line
Steering
Specifications
| Manufacturer | Yamaha |
| Model | Four Stroke Midrange 1.8L F90LB |
| Year | 2027 |
| Condition | New |
| Engine Type | In-Line |
| Bore x Stroke | Bore: 3.19 in. (81 mm); Stroke: 3.5 in. (88.9 mm) |
| Displacement | 111.8 cu. in. (1832 cc) |
| Starting | Electric |
| Trim Method | Power |
| Propshaft Horsepower | 90 bhp; 67.2 kW |
| Fuel Induction | Fuel Injected |
| Alternator | 35 |
| Cooling | Water (Open Loop) |
| Steering | Remote |
| Warranty | 36 |