2025 Yamaha Marine Portables 4 HP Base

Current Yamaha Marine Outboard 25-25-hp Portables 4 HP

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Year 2025
Make Yamaha Marine
Model Portables 4 HP

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Product Details Specifications Photos

Year 2025
Manufacturer Yamaha Marine
Model Name Portables 4 HP
Trim Name Base
Generic Type (Primary) Portable
Engine Type 1 cyl
Engine Power Prop Shaft: 4hp at 4500 rpm
Displacement 139cc
Bore 2.44 in (62 mm)
Stroke 1.81 in (46 mm)
Compression Ratio 8.9:1
Throttle Full RPM Range: 4000 ~ 5000 rpm
Steering Tiller | Angle (maximum): 90° from center, either direction
Exhaust Above Propeller
Ignition CDI
Oil Type Recommended: Yamalube® 4M (See owner's manual)
Lubrication Wet Sump
Cooling Recommended: Thermostatic Control
Gear Ratio (Primary) 2.08:1
Gear Shifter Forward, Neutral, Reverse
Induction Carb

2025 Yamaha Marine Portables 4 HP

PORTABLES

The harbor is like glass as you board the tender to your cuddy for a day on the water; your trusty Yamaha Portable ushering you out. With easy starts, incredible efficiency and reliable performance, Yamaha’s F6, F4 and F2.5, are perfect for all sorts of light duty. Wherever the day takes you, take along a little extra power with Yamaha’s smallest Portables.

Our 139-cc 4-hp portable outboard mirrors our OHV F6, with a couple less horses. It features the same ergonomic, easy-grip starter handle with a built-in decompression device for effortless starts. The F4 also features a built-in fuel tank with the option of switchable access to an additional external tank for amazing extended range. There’s no stopping this little brute.

Features may include:

Only 60 pounds (15” shaft model)

Available in 15” and 20” shaft lengths

Solid 6-amp alternator

Engine

Engine Type 1 cyl

Engine Power Prop Shaft: 4hp at 4500 rpm

Displacement 139cc

Bore 2.44 in (62 mm)

Stroke 1.81 in (46 mm)

Compression Ratio 8.9:1

Throttle Full RPM Range: 4000 ~ 5000 rpm

Steering Tiller | Angle (maximum): 90° from center, either direction

Exhaust Above Propeller

Ignition CDI

Oil Type Recommended: Yamalube® 4M (See owner's manual)

Lubrication Wet Sump

Cooling Recommended: Thermostatic Control

Gear Ratio (Primary) 2.08:1

Gear Shifter Forward, Neutral, Reverse

Induction Carb

Spark Plug

Spark Plug CR6HSB

Electric

Starter System: Manual

Alternator Output, Maximum Output at W.O.T.: 6 Amp

Fuel System

Fuel System Ethanol Blend Limit: 10% Maximum

Fuel Type Recommended: Octane 87

Dimensions

Length Shaft: 15" - 20"

Dimensions Degree of Tilt: 69° | Degree of Trim: -4° through +16°

Capacities

Oil capacity 0.6L

Weights

Weight 60 lbs (27 kg) - 61 lbs (28 kg)

Features

Features Intake: 2 | C.A.R.B. Rating: 3-Star

Warranty

Warranty Limited 3-year Pleasure, 3-year Government, 1-Year Commercial