Yamaha Portables 25 to 15 hp · Virginia Beach
Yamaha F20 outboard: specs, rigging and repower in Virginia Beach.
The F20 is a 362 cc SOHC two-cylinder built on the F25 platform, 126 lb with a 15-inch shaft. It is fuel-injected, adds an intake silencer and an acceleration pump, and lists a variable trolling range of 750 to 1050 RPM. Yamaha offers tiller and remote versions with manual or electric start in 15- and 20-inch shafts.
- Horsepower
- 20 hp
- Engine type
- 2 cyl
- Displacement
- 362 cc
- Shaft length
- 15" - 20"
- Weight †
- 57 kg (126 lbs) - 66 kg (146 lbs)
Specifications
Yamaha F20
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 † | 57 kg (126 lbs) - 66 kg (146 lbs) |
|---|---|
| Full Throttle RPM Range | 5000 ~ 6000 rpm |
| Fuel Induction System | EFI |
| Recommended Engine Oil | Yamalube® 4M (See owner's manual) |
| Engine Type | 2 cyl |
| Displacement | 362 cc |
| Bore x Stroke | 65 x 65.1mm (2.554 x 2.558 in) |
| Prop Shaft Horsepower | 20 hp @ 5500 rpm |
| Alternator Output at W.O.T. | 16 Amp |
| Compression Ratio | 9.3:1 |
| Recommended Fuel | Octane 87 |
| Recommended Fuel Filtration | Yamaha 10-Micron Fuel/Water Separating Filter (external) |
| C.A.R.B. Rating | 2-Star |
| Exhaust | Through Propeller |
| Intake | 4 |
| Ignition | CDI |
| Spark Plug | DPR6EB-9 |
| Starting System | Electric & Manual |
| Lubrication | Wet Sump |
| Engine Oil Capacity | 1.1L/1.0L |
| Recommended Cooling | Thermostatic Control |
| Ethanol Blend Limit | 10% Maximum |
| Gear Ratio | 2.00:1 |
| Gear Shift | Forward, Neutral, Reverse |
| Shaft Length | 15" - 20" |
| Degree of Tilt | 62°- 63° |
| Degree of Trim | -3° through +16° |
| Mounting Centers | N/A |
| Steering Angle (maximum) | 45° from center, either direction |
| Warranty | Limited 3-Year Pleasure, 3-Year Government, 1-Year Commercial |
| Variable Trolling RPM Range | 750 ~ 1050 rpm |
† 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 F20 compares
with the F25, F15.
From Yamaha's spec tables; weights are the lightest Yamaha lists, valvetrain is from its dealer spec signs.
Same family
F20 vs F25
- Rated output: F20 20 hp @ 5500 rpm; F25 25 hp at 5500 rpm.
- Displacement: F20 362 cc; F25 432cc.
Same on both: 126 lb lightest listed weight, 2.00:1 gear ratio, 16-amp alternator, 15 and 20-inch shaft, 87 octane.
Same family
F20 vs F15
- Rated output: F20 20 hp @ 5500 rpm; F15 15 hp @ 5500 rpm.
- Weight: F20 15 lb heavier at the lightest weight Yamaha lists (126 lb vs 111 lb).
- Gear ratio: F20 2.00:1; F15 2.08:1.
- Alternator: F20 16 amp; F15 10 amp.
- Fuel induction: F20 EFI; F15 Carb.
Same on both: 362 cc displacement, SOHC (4-valve) valvetrain (spec sign), 15 and 20-inch shaft, 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 F20.
F20 model codes
| Model code | Controls | Color |
|---|---|---|
| F20SMHB | Tiller handle | Gray |
| F20LMHB | Tiller handle | Gray |
| F20SWHB | Tiller handle | Gray |
| F20LWHB | Tiller handle | Gray |
| F20SWB | Remote mechanical | Gray |
| F20LWB | Remote mechanical | Gray |
| F20LWPHB | Tiller handle | Gray |
| F20SWPB | Remote mechanical | Gray |
| F20LWPB | Remote mechanical | Gray |
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 F20.
- 362 cc 20 hp SOHC portable built on the F25 platform.
- 126 lb with 15-inch shaft.
- 15- and 20-inch shafts; 16-amp alternator.
- CDI microcomputer ignition adjusts timing to throttle position, speed and conditions.
- Pressurized wet-sump lubrication.
- Warning system covers overheat, low oil pressure (2000 RPM limit), over-rev and start-in-gear.
- Phaze Five anti-corrosion paint over YDC-30 alloy.
- SOHC design with two valves per cylinder.
- Balanced crankshaft and labyrinth exhaust for smooth running.
- F20 and F15 add an intake silencer and an acceleration pump.
- 45 degrees of steering in each direction.
- Freshwater flush device works without running the engine.
- Carry handles, resting pads and oil retention allow on-side storage; folding tiller optional.
Repower
Repowering with the F20
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 F20 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 F20 for it. Financing is available on repowers through Yamaha Financial Services.
F20 repower fit
- Shaft lengths
- 15 and 20-inchYamaha spec table
- Weight †
- 126 to 146 lbYamaha spec table, lightest to heaviest listed
- Control types
- tiller-handle (F20SMHB, F20LMHB, F20SWHB, F20LWHB, F20LWPHB); remote mechanical (F20SWB, F20LWB, F20SWPB, F20LWPB)Yamaha model-code list
- Most popular propeller
- Aluminum, 10.5” pitch (Standard)Yamaha dealer spec sign, 2026-09-01
The Portables 25 to 15 hp family
Other engines
in this family.
Common questions
Yamaha F20
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 F20 for it. We answer same business day.