In Stock
2018 Mercury 15 Hp 15MH Outboard Motor
- 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
Need a matched transmission, controls or wiring package? Speak with a parts specialist.
Details & Inspection Notes
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