The YAMAHA 4DMHS Outboard Engine is a compact and reliable 4HP 2-stroke marine motor, designed for effortless portability and dependable performance on the water. Built for small boats, fishing rigs, inflatables, and tenders, this short shaft engine delivers smooth and efficient propulsion wherever you go.

Lightweight and easy to transport, the 4DMHS is perfect for users who need a practical outboard solution for everyday boating or fishing activities. Its durable Yamaha engineering ensures long-lasting performance, while user-friendly controls make operation simple even for beginners.

A standout feature is the shallow water drive system, allowing you to navigate rivers, estuaries, and creeks with greater confidence and reduced risk of prop damage.

Key Features

• 4HP 2-Stroke Engine – Strong and efficient power output for small craft
• Short Shaft Design – Ideal for inflatables, tenders, and lightweight boats
• Lightweight & Portable – Easy to carry and install
• Shallow Water Drive – Perfect for rivers, creeks, and shallow areas
• 360° Steering – Enhanced maneuverability in tight spaces
• F-N Shift System – Simple forward and neutral control
• Pre-Mix Fuel Ratio 100:1 – Efficient fuel management
• 6P Alloy Propeller – Durable and corrosion-resistant performance
• Splined Prop Shaft – Secure and stable power transmission
• Water Telltale System – Confirms proper engine cooling at a glance

Specifications

• Engine Type: 2-Stroke, In-line 1
• Displacement: 103.0cc
• Bore x Stroke  54x45 mm
• Recommended Max RPM: 5000-5500
• Lubrication System: Pre-mixing
• Fuel Management: Carb
• Ignition: CDI
• Starter System: Manual
• Operation Method: Tiller handle
• Trim & Tilt Method: Manual tilt
• Gear Ratio: 2.08:1
• Previous Model Code(s): 4AMHS