Yamaha Portables 6 to 2.5 hp · Virginia Beach
Yamaha F4 outboard: specs, rigging and repower in Virginia Beach.
The F4 shares the F6's 139 cc overhead-valve engine and 60 lb weight, rated 4 hp at 4500 RPM. Its starter handle has built-in decompression, and like the F6 it steers 180 degrees and switches between its built-in tank and an external one.
- Horsepower
- 4 hp
- Engine type
- 1 cyl
- Displacement
- 139cc
- Shaft length
- 15" - 20"
- Weight †
- 27 kg (60 lbs) - 28 kg (61 lbs)
Specifications
Yamaha F4
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 † | 27 kg (60 lbs) - 28 kg (61 lbs) |
|---|---|
| Full Throttle RPM Range | 4000 ~ 5000 |
| Fuel Induction System | Carb |
| Recommended Engine Oil | Yamalube® 4M (See owner's manual) |
| Engine Type | 1 cyl |
| Displacement | 139cc |
| Bore x Stroke | 62 x 46mm (2.44 x 1.81in) |
| Prop Shaft Horsepower | 4hp at 4500 rpm |
| Alternator Output at W.O.T. | 6 Amp |
| Compression Ratio | 8.9:1 |
| Recommended Fuel | Octane 87 |
| Recommended Fuel Filtration | N/A |
| C.A.R.B. Rating | 3-Star |
| Exhaust | Above Propeller |
| Intake | 2 |
| Ignition | CDI |
| Spark Plug | CR6HSB |
| Starting System | Manual |
| Lubrication | Wet Sump |
| Engine Oil Capacity | 0.6L |
| Recommended Cooling | Thermostatic Control |
| Ethanol Blend Limit | 10% Maximum |
| Gear Ratio | 2.08:1 |
| Gear Shift | Forward, Neutral, Reverse |
| Shaft Length | 15" - 20" |
| Degree of Tilt | 69° |
| Degree of Trim | -4° through +16° |
| Mounting Centers | N/A |
| Steering Angle (maximum) | 90° 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 F4 compares
with the F6, F2.5.
From Yamaha's spec tables; weights are the lightest Yamaha lists, valvetrain is from its dealer spec signs.
Same family
F4 vs F6
- Rated output: F4 4hp at 4500 rpm; F6 6hp at 5000 rpm.
Same on both: 139cc displacement, OHV (2-valve) valvetrain (spec sign), 60 lb lightest listed weight, 2.08:1 gear ratio, 6-amp alternator, 15 and 20-inch shaft, 87 octane.
Same family
F4 vs F2.5
- Rated output: F4 4hp at 4500 rpm; F2.5 2.5hp at 5500 rpm.
- Displacement: F4 139cc; F2.5 72cc.
- Weight: F4 23 lb heavier at the lightest weight Yamaha lists (60 lb vs 37 lb).
- Gear ratio: F4 2.08:1; F2.5 2.01:1.
- Alternator: F4 6 Amp; F2.5 N/A.
Same on both: OHV (2-valve) valvetrain (spec sign), 15 and 20-inch shaft, 87 octane.
Rigging
Controls, gauges
and Helm Master EX.
Controls
- Multi-Function Tiller Handle (compatible)
- Helm Master® EX (not available)
- Command Link Plus Digital Controls (not available)
- Mechanical 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 F4.
F4 model codes
| Model code | Controls | Color |
|---|---|---|
| F4SMHA | Tiller handle | Gray |
| F4LMHA | Tiller handle | 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 F4.
- 139 cc 4 hp overhead-valve portable sharing the F6 platform.
- Starter handle with built-in decompression.
- Built-in tank with switchable access to an external tank.
- 60 lb with 15-inch shaft; 15- and 20-inch shafts; 6-amp alternator.
- Pressurized wet-sump oiling on an overhead-valve engine.
- Built-in see-through fuel tank; F6 and F4 can switch to an optional 3.1-gallon external tank.
- Phaze Five anti-corrosion paint over YDC-30 alloy.
- Factory-set carburetor plus automatic decompression, priming and start-in-gear prevention.
- CDI or TCI ignition, balanced crankshaft, long span mounts and labyrinth exhaust.
- Electronic ignition and thermostatic cooling.
- Easy Storage Oil Retention System allows on-side storage without leaks.
- F6 and F4 steer 180 degrees; F2.5 steers 360 degrees with a twist-grip throttle.
- Front and rear carry handles.
Repower
Repowering with the F4
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 F4 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 F4 for it. Financing is available on repowers through Yamaha Financial Services.
F4 repower fit
- Shaft lengths
- 15 and 20-inchYamaha spec table
- Weight †
- 60 to 61 lbYamaha spec table, lightest to heaviest listed
- Control types
- tiller-handle (F4SMHA, F4LMHA)Yamaha model-code list
- Most popular propeller
- Aluminum, 7” pitch @ 15” shaft (Standard); Aluminum, 6.5” pitch @ 20” shaft (Standard)Yamaha dealer spec sign, 2026-09-01
The Portables 6 to 2.5 hp family
Other engines
in this family.
Common questions
Yamaha F4
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 F4 for it. We answer same business day.