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2018 Mercury 15 Hp 15MH Outboard Motor
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

2018 Mercury 15 Hp 15MH Outboard Motor

Brand: Mercury
Condition: New
Regular price $1,136.10 Save $284.02
Sale price $852.08
Sale price ends Mon Nov 30, 11:59 PM PT
+ freight from $185.00, insured LTL, priced by delivery zone (rates)
From $1,037.08 delivered
  • 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
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Details & Inspection Notes

The 2018 Mercury 15MH is a new, manual-start tiller outboard rated at 15 HP, with a 15-inch short shaft and a four-stroke powerhead displacing 351cc. Rather than carrying the extra weight and wiring of electric start, this one keeps things simple with a pull cord, which suits owners running a smaller fishing boat, dinghy, or inflatable where low weight at the stern matters.

Starting and electrical

Because this is manual start, there is no onboard alternator for charging a battery; Mercury offers an alternator kit as a separate, optional purchase for owners who want to run small electronics or keep a battery charged. Full-throttle engine speed falls between 5400 and 5600 RPM, somewhat higher than the electric-start version's range in this lineup. Fuel is carbureted rather than injected, supplied from an external tank rated at 6.6 gallons.

Durability and coverage

Mercury backs the lower end with a saltwater rating and multi-layer corrosion protection, paired with electronic safeguards that watch for overheating, over-revving, and starting in gear by accident. A 3-blade aluminum propeller spins on the same 2.15:1 gearcase used elsewhere in this lineup, and Mercury covers this one with a three-year warranty.

Does this have a battery charging option? Not out of the box; Mercury sells an alternator kit separately for owners who need one.

Is this electric or manual start? Manual pull-start only.

Specifications

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
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
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

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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