Mercury 3.5MH 3.5HP – Four Stroke Manual Tiller 15-Inch

Mercury 3.5MH 3.5HP Portable Outboard

The Mercury 3.5MH is an ultra-lightweight 3.5HP FourStroke outboard engineered for maximum portability and simple tiller control in the US recreational boating sector. Boasting a compact 85cc single-cylinder OHV engine architecture and an incredible dry weight of just 38 lbs, it is one of the lightest outboards in its class. This 15-inch short shaft model features a 360-degree pivot steering system, making it the premier choice for inflatable dinghies, canoes, and square-stern kayaks. Our reliable marine outboard solutions deliver the mechanical simplicity needed for peaceful pond and lake exploration.

Operational peak performance for this Mercury 3.5HP is achieved between 5000 and 6000 RPM. The 2.15:1 gear ratio offers a distinct mechanical advantage, translating the OHV torque into steady propulsion for small displacement hulls. Manufactured in the USA, this highly corrosion-resistant motor features CDI ignition with Electronic Spark Advance to ensure a reliable start and quiet operation during quiet morning fishing trips.

Technical Specifications of Mercury 3.5MH

• Ultra-lightweight 38 lbs dry weight makes it exceptionally easy to carry, transport, and mount by hand.
• 360-degree pivot steering provides full thrust in any direction, effectively replacing the need for a heavy reverse gear.
• Simple 2-valve pushrod carbureted induction ensures straightforward mechanical operation and easy field maintenance.
• Manual 4-position trim system allows for precise engine angling to navigate shallow water and rocky shorelines.
• Above-propeller exhaust design manages engine backpressure and operating noise for a more peaceful boating experience.
• Integrated splash lubrication system ensures the internal 85cc engine components remain protected during all-day use.

Ultra-Portable 38 Lbs Design

At only 38 lbs, the Mercury 3.5MH is designed for the solo adventurer. It can be easily transported in the trunk of a car or carried to remote launch sites, making it the ultimate power solution for small portable vessels like inflatables and canoes in the American wilderness.

360-Degree Steering Versatility

The innovative 360-degree steering system allows for total maneuverability. By pivoting the engine 180 degrees, the captain can achieve full reverse thrust without the complexity of a mechanical gear shift. This design reduces internal weight and improves durability for small boat explorers.

OHV Engine Architecture

The 85cc single-cylinder Over-Head Valve (OHV) design maximizes fuel efficiency while providing reliable torque for pushing displacement hulls. It provides the sustained low-end grunt required for navigating calm lakes and protected coastal backwaters without the vibration of larger engine blocks.

Mercury 3-Year Protection

Every portable Mercury 3.5HP unit is backed by a comprehensive 3-Year Limited Warranty for American owners. This factory-level protection ensures long-term peace of mind and grants access to genuine parts through a vast nationwide marine dealer service network.

Canoe & Inflatable Match

This short shaft 3.5HP outboard is the ideal match for canoes, square-stern kayaks, and small inflatable tenders. It provides the reliable low-end thrust needed for calm-water exploration while offering unmatched portable convenience and zero electrical dependency.

Maintenance & Longevity

Maintaining the 0.3L oil capacity in the splash lubrication system is vital for preserving the engine’s tight mechanical tolerances. Always flush the cooling passages with fresh water after use to maintain corrosion resistance. Pro Tip from the Shop: Because this motor uses a gravity-fed fuel system, always close the fuel tank vent and the fuel shut-off valve when transporting the motor on its side to prevent oil and fuel leakage.