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Mercury 9.9MLH FourStroke
Inspected & Documented Condition notes recorded before palletizing.
30-Day Startup Warranty Covers block, heads and internal moving components.
In Stock & Ready to Freight Outboard Motors Old stock

Mercury 9.9MLH FourStroke

Part no: 9.9MLH
Brand: Mercury
Condition: Used
Regular price $2,186.35 Save $546.59
Sale price $1,639.76
Sale price ends Mon Nov 30, 11:59 PM PT
Freight included, insured LTL to the continental US (rates)
$1,639.76 delivered to the continental US
  • Palletized and heavy shrink-wrapped for freight
  • LTL carrier delivery with optional liftgate service
  • Ships in 1–2 business days from Los Angeles, CA
  • Transit typically 3–14 business days, continental US
Ask a question about this unit

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

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