Mercury 15HP 15MH EFI Outboard Motor – 15″ Shaft
Featuring 15 horsepower, EFI operation, and a 15-inch shaft, the Mercury 15MH supports compatible shorter-transom boats. Electronic fuel injection supports controlled operation, while proper shaft matching helps maintain propeller position and predictable handling.
Description
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Common Question of Mercury 15MH
Is Mercury 15MH fuel injected?
Yes. The EFI designation identifies an electronic fuel injection system on this Mercury 15-horsepower outboard. Its 15-inch shaft suits a matching short transom. Confirm fuel, steering, controls, battery, wiring, engine weight, and hull requirements before installation of this high performance outboard motor package.
What boats fit its shaft?
Boats designed for a matching 15-inch transom are the intended application. Measure the hull before purchase because incorrect shaft length can affect cooling-water pickup, propeller immersion, steering response, and handling. Correct measurement supports this ready to bolt marine outboard installation.
What should buyers verify?
Verify the boat’s maximum horsepower, transom capacity, engine weight allowance, mounting hardware, steering arrangement, fuel supply, battery, wiring, and package contents. EFI requires compatible electrical connections and proper rigging. Follow Mercury’s installation and service instructions before operating the engine.













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