Yamaha Midrange 115 to 75 hp · Virginia Beach
Yamaha F90 outboard: specs, rigging and repower in Virginia Beach.
The F90 has the same 1.8-liter displacement as the F115 with a single overhead cam, rated 90 hp and weighing 353 lb with a 20-inch shaft, 13 lb lighter than the design it replaced. It comes in 20- and 25-inch shafts, and its trolling switch runs 550 to 1000 RPM.
- Horsepower
- 90 hp
- Engine type
- Inline 4
- Displacement
- 1.8L
- Shaft length
- 20" - 25"
- Weight †
- 160kg (353 lbs) - 164kg (362 lbs)
Specifications
Yamaha F90
specs, as Yamaha lists them.
Specs and features: Yamaha, read from yamahaoutboards.com and Yamaha's Engine Comparison tool on 2026-10-05. Yamaha can change a model by model year; we confirm the exact engine when we quote.
| 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 |
† Weight refers to shortest shaft length, and is measured without motor oil, gearcase oil and propeller (except models 25 hp and under, which include a standard propeller). All Jet model weights include the jet pump assembly (weight estimated).
Compared
How the F90 compares
with the VF90, F90 Jet, F115, F75.
From Yamaha's spec tables; weights are the lightest Yamaha lists, valvetrain is from its dealer spec signs.
Same 90 hp class, Yamaha In-Line Four V MAX SHO
F90 vs VF90
- Gear ratio: F90 2.15:1; VF90 (28/12) 2.33.
Same on both: 90hp @ 5500 rpm rated output, 1.8L displacement, SOHC (16-valve) valvetrain (spec sign), 353 lb lightest listed weight, 35-amp alternator, 20 and 25-inch shaft, 87 octane, 26-inch mounting centers.
Same 90 hp class, Yamaha Jet Drive
F90 vs F90 Jet
- Output (at the pump on jets): F90 90hp @ 5500 rpm; F90 Jet 65hp @ 5500rpm.
- Weight: F90 1 lb lighter at the lightest weight Yamaha lists (353 lb vs 354 lb).
- Gear ratio: F90 2.15:1; F90 Jet Direct Drive.
- Shaft or transom: F90 20 and 25-inch; F90 Jet 25-inch.
- Mounting centers: F90 26-inch; F90 Jet N/A.
Same on both: 1.8L displacement, SOHC (16-valve) valvetrain (spec sign), 35-amp alternator, 87 octane.
Same family
F90 vs F115
- Rated output: F90 90hp @ 5500 rpm; F115 115hp at 5500 rpm.
- Valvetrain (spec sign): F90 SOHC (16-valve); F115 DOHC (16-valve).
- Weight: F90 24 lb lighter at the lightest weight Yamaha lists (353 lb vs 377 lb).
Same on both: 1.8L displacement, 2.15:1 gear ratio, 35-amp alternator, 20 and 25-inch shaft, 87 octane, 26-inch mounting centers.
Same family
F90 vs F75
- Rated output: F90 90hp @ 5500 rpm; F75 75hp at 5500 rpm.
- Shafts: F90 20 and 25-inch; F75 20-inch.
- Mounting centers: F90 26-inch; F75 N/A.
Same on both: 1.8L displacement, SOHC (16-valve) valvetrain (spec sign), 353 lb lightest listed weight, 2.15:1 gear ratio, 35-amp alternator, 87 octane.
Rigging
Controls, gauges
and Helm Master EX.
Controls
- Mechanical Controls (compatible)
- Multi-Function Tiller Handle (compatible)
- Helm Master® EX (not available)
- Command Link Plus Digital Controls (not available)
Gauges
- Command Link and Analog Gauges (compatible)
- Command Link Plus Display (not available)
Yamaha lists Helm Master EX as not available for the F90.
Propellers Yamaha names for the F90
- Yamaha Talon SSFor F70 to F115 and T50/T60 on pontoon, walleye, fiberglass and deep-V boats.
- Yamaha Talon GPFor lighter boats with T50 to F115 outboards.
- Yamaha Talon PontoonFor pontoons, including heavily loaded ones, with T50 to F115 outboards.
- Yamaha Talon SS4Fits F70 to VF115 and T50/T60 K-series (4.25-inch) gearcases; SDS standard.
- Yamaha TalonHigh-grip, low-slip prop for F70 to F115 and T50/T60 pontoons and aluminum boats.
Yamalube oil change kit
- Medium Oil Change KitYamaha's row: Model F90 / VF90 · PROD. YEAR '03~ · 05W-30 KIT NA · 10W-30 KIT LUB-MRNMD-KT-11 · 20W-40 KIT LUB-MRNMD-KT-21
F90 model codes
| Model code | Controls | Color |
|---|---|---|
| F90LB | Remote mechanical | Gray |
| F90XB | Remote mechanical | Gray |
| F90LB2 | Remote mechanical | Pearl White |
| F90XB2 | Remote mechanical | Pearl White |
| F90LB3 | Remote mechanical | Matte Brown |
Model codes from Yamaha's current model-code list. Ask us which code fits your boat; we confirm it when we quote.
Features
What's built into
the F90.
- 1.8-liter SOHC with four valves per cylinder, rated 90 hp.
- 353 lb, 13 lb lighter than the previous design.
- 20- or 25-inch shafts; 35-amp alternator.
- Optional variable trolling RPM through the Command Link tachometer.
- Phaze Five paint over YDC-30 alloy plus stainless drive, prop and shift shafts and sacrificial anodes.
- Pressurized wet-sump oiling with a compact oil pump.
- Warning system limits RPM to 2000 on overheat or low oil pressure.
- Updated cowling with a Water Draining Intake Duct and side intakes.
- Labyrinth exhaust and revised muffler; quieter than the previous design.
- Multi-point EFI.
- Composite intake manifold with long tube tracks for low-end and mid-range torque.
- TCI microcomputer ignition timing.
- F115 uses DOHC; F90 and F75 use SOHC; all have four valves per cylinder.
- Compatible with the Multi-Function Tiller Handle.
- Three-phase alternators up to 35 amps.
- Variable Trolling RPM Switch: 650-900 RPM (F115) or 550-1000 RPM (F90, F75) in 50-RPM steps.
- Freshwater flush device works without starting the engine.
Repower
Repowering with the F90
at Coastal Marine.
Coastal Marine is an Elite Yamaha dealer and an authorized Yamaha Repower Center on Shore Drive in Virginia Beach. A repower with the F90 takes the old or worn-out outboard off a sound hull, of any make, and puts the new Yamaha on, with the controls, gauges and rigging the new setup needs. Warranty work on the Yamaha power we install is authorized in-house.
We don't post engine prices. Tell us the boat, what's on the transom now and roughly how many hours it has, and we'll quote the F90 for it. Financing is available on repowers through Yamaha Financial Services.
F90 repower fit
- Shaft lengths
- 20 and 25-inchYamaha spec table
- Mounting centers
- 26-inchYamaha spec table
- Weight †
- 353 to 362 lbYamaha spec table, lightest to heaviest listed
- Control types
- remote mechanical (F90LB, F90XB, F90LB2, F90XB2, F90LB3)Yamaha model-code list
- Most popular propeller
- Talon GP® with Shift Dampener System (SDS), 16” pitchYamaha dealer spec sign, 2026-09-01
The Midrange 115 to 75 hp family
Other engines
in this family.
Common questions
Yamaha F90
questions, answered.
Get a quote
on new Yamaha power.
Tell us the boat, the engines on it now and roughly the hours, and we'll quote the F90 for it. We answer same business day.