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Mercury 15MRC 15HP – Four Stroke 15-Inch Manual
Mercury 15MRC 15HP – Compact clean-running motor designed for remote throttle and shift integration on short-transom watercraft. EFI system eliminates the battery requirement for manual starting.
- Transom Shaft Length Specification: 15-inch short shaft length.
- Core Engine Mechanical Design: Inline 2-Cylinder SOHC 333cc.
- High Precision Fuel Induction: Electronic Fuel Injection (EFI) system.
- Optimal Marine Vessel Compatibility: Excellent for small inflatables and fiberglass skiffs.
- Long Term Warranty Coverage: 3-year factory warranty plan.
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Description
Mercury 15MRC 15HP EFI Tiller
The Mercury 15MRC is an ultra-lightweight 15HP FourStroke outboard engineered for maximum portability and advanced multi-function tiller control in the US recreational boating sector. Boasting a 333cc twin-cylinder SOHC engine architecture and a highly optimized dry weight of just 99 lbs, it provides an unparalleled power-to-weight ratio for effortless transom mounting. This 15-inch short shaft model is perfectly configured for inflatable dinghies, canoes, and standard low-transom aluminum tenders. Our dependable outboard propulsion systems deliver the mechanical reliability needed for peaceful fishing trips in shallow estuaries.
Operational peak performance for this Mercury 15HP is achieved seamlessly across the 5700 to 6200 RPM full throttle range. The 2.15:1 gear ratio offers a mechanical advantage that translates the EFI-enhanced torque curve directly into steady hull planing and superior trolling capability. Manufactured with rugged US engineering standards, this corrosion-resistant motor features excellent vibration dampening to ensure a quiet, comfortable ride during long days navigating American inland lakes.
Technical Specifications of Mercury 15MRC
- The 333cc two-cylinder SOHC design delivers consistent, vibration-free torque for pushing small aluminum skiffs.
- Advanced Electronic Fuel Injection (EFI) ensures straightforward fuel induction and incredibly easy maintenance procedures without carburetor jets to clog.
- The exclusive multi-function manual tiller handle integrates shift, throttle, and steering into one convenient, ergonomic control point.
- Manual six-position trim allows the operator to easily adjust engine angle for optimal shallow water navigation.
- SmartCraft PCM 07 ignition guarantees reliable cold starts and optimized spark timing across the entire power band.
- An integrated 12 Amp alternator keeps basic marine electronics and essential battery levels charged.
Ultra-Lightweight 99 Lbs Architecture
Weighing in at an incredible 99 lbs, this 15HP outboard is one of the lightest in its class. This makes it incredibly easy to carry, transport, and mount onto the transoms of inflatable RIBs and small skiffs without sacrificing the displacement-driven torque of a twin-cylinder block.
Multi-Function Tiller Control
The exclusive multi-function tiller handle places shift, throttle, throttle friction, and steering directly in the palm of the captain’s hand. This intuitive design allows for effortless, one-handed operation, vastly improving maneuverability and safety when docking in tight US marinas.
Battery-Free EFI System
The advanced EFI system delivers exact fuel delivery based on engine speed and atmospheric load, operating entirely without a battery. This ensures the outboard fires up effortlessly with the manual pull start, providing perfectly smooth idling—essential for stealthy approaches to shallow fishing spots.
Mercury 3-Year Protection
Every portable Mercury 15HP unit is backed by a comprehensive 3-Year Limited Warranty for American owners. This factory-level protection ensures long-term peace of mind and grants access to genuine parts through a vast nationwide marine dealer service network.
Inflatable Tender Match
This short shaft 15HP outboard is the ideal match for premium inflatable dinghies and lightweight aluminum fishing boats. It provides the sustained high-end thrust needed for navigating coastal tidal flows and offshore swells while offering unmatched portable convenience.
Maintenance & Longevity
Routine maintenance of the 1.0L oil capacity in the wet sump is vital for maintaining internal tolerances. Always flush the cooling system with fresh water after each salt-water mission. Pro Tip from the Shop: The multi-function tiller contains intricate shift linkages; periodically apply marine grease to these internal twist-grip components to maintain a buttery-smooth shifting experience in harsh saltwater environments.
MERCURY 15MRC Full Specs
| Engine type | Inline 2-Cylinder SOHC |
| Displacement | 333 cc (20.3 cu in) |
| Bore x stroke | 61 x 57 mm (2.40 x 2.24 in) |
| Horsepower | 15hp @ 5000 RPM |
| Full-throttle rpm range | 5700 - 6200 RPM |
| Compression ratio | N/A |
| Fuel induction | Electronic Fuel Injection (EFI) |
| Recommended fuel | 87 Octane / 10% Ethanol |
| Ignition | SmartCraft PCM 07 Digital Inductive |
| Alternator output | 12 Amp (151 Watt) |
| Gear ratio | 2.15:1 |
| Gear shift | Forward, Neutral, Reverse |
| Shaft length | 15 inch |
| Dry weight | 99 lbs (45 kg) |
| Controls | Manual Start Tiller (Multi-function) |
| Steering | Tiller |
| Trim and tilt | Manual (6-position) |
| Exhaust | Through Propeller |
| Cooling system | Water Cooled w/ Thermostat |
| Lubrication | Wet Sump |
| Oil capacity | 1.1 Quarts (1.0 Liter) |
| Emissions rating | EPA 2013 / C.A.R.B. 3-Star |
Common Questions for Mercury 15MRC 15HP
The Mercury 15MRC fuel system is designed for simplicity, maintaining a very low gallons per hour rate. This Mercury 15HP manual start model is perfect for small utility boats, providing reliable performance without the need for a battery, ensuring high efficiency during long fishing trips.
The 15-inch shaft is the optimal boat hull application for standard small aluminum boats and inflatable tenders. This Mercury 15MRC shaft length ensures the propeller is at the correct depth to provide Mercury marine propulsion authority, allowing the vessel to plane quickly even with a moderate payload.
Regularly verifying the FC-W engine oil capacity is essential for the long-term health of the 333cc powerhead. Using Genuine Mercury Parts during every Mercury 15MRC service interval prevents internal friction and wear, ensuring the engine remains quiet and dependable for recreational or light commercial use.
Since it lacks a battery, the Mercury 15MRC electrical output is limited to the lighting coil. However, ensure the minimum marine cranking amps are met if you later install an electric start kit, as this Mercury 15HP ignition system requires consistent voltage to maintain the high-precision spark timing.
Inspect the sacrificial aluminum anode locations on the transom bracket and above the gearcase. These Mercury 15MRC corrosion protection components neutralize electrolysis, safeguarding the Mercury outboard aluminum housing from pitting when the motor is used in brackish or saltwater coastal environments.
- 333cc Inline 2-Cylinder Four Stroke EFI Powerhead (Manual Start)
- Multi-Function Tiller Handle and 1qt Marine Engine Oil
- 3.2gal External Fuel Tank and Aluminum Propeller
- Owner Manuals and 3YR Limited Factory Warranty
- CARB 3-Star Ultra Low Emission Rating
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