Mercury 5hp Outboard Engine

This engine is supplied in partnership with Cambridge Outboards, an official Tohatsu dealer giving you peace of mind with expert support and matching dealer pricing.

Overview

The Mercury F5M 5hp short shaft 4-stroke outboard is a lightweight, quiet and versatile engine designed for small boats that need dependable portable power. With multiple trim positions for performance tuning and shallow-water operation, plus a through-prop exhaust for extra-quiet running, it’s a great match for aluminium tiller boats, inflatable soft hulls, jon boats, utility boats and small sail boats.

Key Benefits

• Multiple trim positions to enhance performance and enable shallow-water operation
• Through-prop exhaust for extra-quiet operation
• Lightweight portable design at just 57 lb (25kg)
• Simple manual pull start operation
• F-N-R gearing for improved low-speed handling and docking
• Integrated fuel tank for a clean, self-contained setup, with optional external tank support
• A perfect match for Hydrus 300 or smaller

Specifications

• Power: 5hp / 3.7kW
• Engine Type: 1 cylinder, 4-stroke
• Displacement: 123cc
• Full Throttle RPM: 4,500 – 5,500
• Fuel Induction System: 2-valve pushrod (overhead valve)
• Fuel System: Carbureted
• Starting: Manual
• Steering: Tiller
• Gear Shift: F-N-R
• Gearcase Ratio: 2.15:1
• Cooling System: Water-cooled with thermostat
• Ignition: CDI with electronic spark advance
• Engine Protection Warning System: Low oil pressure, over-rev
• Trim Positions: 6
• Shallow Water Drive: Yes
• Shallow Water Trim Range: 16°
• Exhaust System: Through prop
• Integrated Fuel Tank Capacity: 1.1L
• Optional External Fuel Tank Capacity: 12L
• Bore x Stroke: 59 x 45mm
• CARB Star Rating: 3
• Colour: Phantom Black
• Dry Weight (lightest model): 25kg

Shaft Length Options

• Short Shaft: 15″ / 381mm
• Long Shaft: 25″ / 635mm

Fuel and Oil Recommendations

• Recommended Fuel: Unleaded 90RON minimum
• Recommended Oil: Mercury FourStroke Oil 10W-30

FAQs

Is this outboard suitable for inflatable boats?

Yes – it’s well suited to inflatable soft hull boats thanks to its portable weight, quiet through-prop exhaust and practical trim positions.

Is it pull start or electric start?

This model is manual pull start only.

Does it have reverse?

Yes – it has F-N-R (Forward-Neutral-Reverse).

Can I run it in shallow water?

Yes – it has shallow water drive and multiple trim positions to help with shallow-water operation.

Does it have an internal fuel tank?

Yes – it includes an integrated 1.1L fuel tank, and it also supports an optional 12L external tank.

Is a long shaft version available?

Yes – a long shaft option is available, as well as the short shaft model.

Shipping cost

There is a (Pre Delivery Inspection) and shipping charge for this item to mainland UK:

If shipping with a Hydrus then shipping will be:

Please let us know if you prefer to collect for FREE from Worthing, West Sussex or if you’d like to arrange your own delivery.

Please Note: Our warehouse is NOT open to the public.

For shipping overseas please contact us first.

Please see all our Shipping Fees here.

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