In Stock
Mercury 9.9MLH FourStroke
- ISPM 15 heat-treated Euro palletized & weatherproof shrink-wrapped
- Insured European road freight delivery with hydraulic tail-lift service
- Dispatches in 1–2 business days from our UK & European Logistics Centre
- Transit typically 1–3 business days (UK) / 3–6 business days (Continental Europe)
Need a matched transmission, controls or wiring package? Speak with a parts specialist.
Details & Inspection Notes
At 9.9 hp, this used Mercury 9.9MLH FourStroke runs a standard gearcase on a 20 inch shaft, with manual tiller starting and a carbureted fuel system.
Specifications worth knowing
The gearcase ratio comes in at 2.08:1, full throttle sits between 5000 and 6000 rpm, and the alternator is rated 6 amps (76 watts) for topping up a battery while running. Remote fuel tank capacity is listed at 3.2 gallons (12 liters).
What to check before buying
Measure your transom for the 20 inch shaft before you buy; steering is tiller only on this unit, with no remote-control option offered. Ignition is CDI with electronic spark advance, and the cooling system is water-cooled with a thermostat.
Who it suits
A straightforward tiller motor for aluminum, inflatable, utility, jon, and sailboats that do not call for remote steering or a heavy-duty low-speed gearcase.
Condition notes
Dry weight is listed at 84 lbs, with manual ratcheting trim and a through-prop exhaust. Since this is a used unit, ask us about hours and service history, as wear varies boat to boat.
Common questions
Does it charge a battery while running? Yes, the alternator here is rated 6 amps (76 watts).
What fuel does Mercury recommend? 87 octane with up to 10 percent ethanol.
What oil is recommended for this engine? Mercury FourStroke 10W-30 oil.
Is a propeller included? Yes, this listing includes a propeller.
Startup & Installation Checklist
- Inspect all external gaskets, seals, spark plugs and timing components prior to installation.
- Refill engine oil, transmission gear oil and coolant to manufacturer-specified capacities before initial cranking.
- Prime the lubrication system and verify ECU wiring pinouts, sensors, and ground connections.
- Startup warranty covers internal lubricated components, cylinder heads, and engine block for 30 days from delivery.
Full terms: 30-day startup warranty · returns