In Stock & Ready to Freight Outboard Motors

2018 Mercury 15 Hp 15MH Outboard Motor

Brand: Mercury
Condition: Used
$1,136.10
+ $185.00 flat-rate insured LTL freight (details)
$1,321.10 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 3–7 business days, continental US
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Details & Inspection Notes

2018 Mercury 15 HP 15MH Outboard Motor, Reliable, Powerful, and Efficient!

The 2018 Mercury 15 HP 15MH Outboard Motor is a powerful, fuel-efficient, and durable 4-stroke engine designed for medium to larger jon boats, skiffs, inflatables, and fishing vessels. Featuring a 351cc large displacement powerhead, this outboard provides exceptional torque and quick acceleration, making it one of the best-performing 15 HP motors in its class.

With its manual start, tiller steering, and integrated F-N-R gear shifting, this motor ensures easy operation and smooth handling. Mercury’s multi-layer corrosion protection and saltwater rating make it perfect for both freshwater and saltwater use. The quiet through-propeller exhaust system, thermostat-controlled cooling, and start-in-gear protection further enhance its safety, durability, and performance.

Whether you’re looking for a reliable kicker motor, a powerful primary outboard, or a fuel-efficient solution for your boat, the Mercury 15MH delivers unbeatable performance and value.


Key Features & Benefits

15 HP 4-Stroke Engine with Large Displacement (351cc)More torque & better fuel economy
Manual Start with CDI IgnitionQuick, reliable starting in all conditions
Tiller Handle with Integrated F-N-R Gear ShiftEasy maneuvering & smooth shifting
Corrosion-Resistant & Saltwater RatedZinc-coated passages & sacrificial anodes
Thermostat-Controlled Cooling SystemOptimized temperature regulation
Shallow Water DriveIdeal for navigating in low water conditions
Quiet Through-Prop Exhaust SystemReduced noise & vibration for smoother rides
Low Oil Pressure & Over-Rev ProtectionEnsures long engine life & safe operation
6.6 Gallon Fuel Tank & Quick Connect Fuel LineExtended run time & easy refueling
3-Year Mercury Marine WarrantyTrusted reliability & long-lasting performance


Technical Specifications

Engine & Performance

Feature Details
Engine Type 4-Stroke, Large Displacement Powerhead
Horsepower 15 HP
Shaft Length 15” (Short Shaft)
Starting System Manual Start
Fuel System Carbureted
Full Throttle RPM Range 5400-5600 RPM
Displacement 351cc (21.4 cubic inches)
Bore & Stroke 2.40 x 2.36 inches
Cooling System Water-Cooled, Thermostatically Controlled
Fuel Type Unleaded Gasoline (87 Octane, up to 10% Ethanol)
Fuel Tank Capacity 6.6 Gallons (Included)
Lubrication System Trochoid Pump
Oil Capacity 1 Quart (1000 mL), SAE 10W-30 Mercury 4-Stroke Outboard Oil

Propulsion & Control

Feature Details
Steering Type Tiller Handle
Gear Shift Forward-Neutral-Reverse (Integrated in Tiller Handle)
Gear Ratio 2.15:1
Propeller 9.2” Diameter X 9.8” Pitch, 3-Blade Aluminum
Trim & Tilt Manual
Shallow Water Drive Yes
Steering Tension Control Adjustable for Stability

Safety & Durability

Feature Details
Saltwater Rated Yes, Multi-Layer Corrosion Protection
Start-in-Gear Protection Yes
Low Oil Pressure Warning Indicator Yes
Overheat Warning System Yes
Over-Rev Protection Yes, ESG System
Safety Lanyard Stop Switch Yes

What’s Included in the Box?

2018 Mercury 15 HP 15MH Outboard Motor
6.6-Gallon External Fuel Tank & Quick Connect Fuel Line
3-Blade Aluminum Propeller
Mercury 4-Stroke Oil
Owner’s Manual
Tool Kit
Mercury Marine 3-Year Warranty

Note: Battery & optional alternator kit not included (alternator sold separately).


Frequently Asked Questions (FAQ)

Is the Mercury 15MH suitable for saltwater use?
Yes! It is saltwater-rated with zinc-coated water passages, sacrificial anodes, and corrosion-resistant materials.

Does this outboard have an electric start option?
No, this model is manual start only, but it features CDI ignition for reliable cold starts.

What type of boats is this outboard ideal for?
Perfect for medium to larger jon boats, skiffs, inflatables, and small fishing boats.

How fuel-efficient is this outboard?
The large displacement powerhead provides better torque & fuel economy compared to smaller engines.

Can I add an alternator for battery charging?
Yes, the optional 12A alternator kit can be installed for battery charging and additional power needs.


Call to Action, Order Now!

Get reliable power, exceptional fuel efficiency, and superior durability with the 2018 Mercury 15 HP 15MH Outboard Motor. Whether you’re fishing, exploring, or cruising, this short shaft 4-stroke engine delivers unbeatable performance.

Limited stock available, Order today for fast shipping!

Startup & Installation Checklist

  • Replace timing components, water pump and plugs before initial startup where applicable.
  • Refill all fluids with manufacturer-specified oil and coolant.
  • Verify sensors, ECU pinouts and grounds against your chassis or hull wiring.
  • Startup warranty covers heads, block and internal lubricated components for 30 days from delivery.

Full terms: 30-day startup warranty · returns