2020 Mercury SeaPro 15 HP – 20 in. Shaft


Season after season, these durable, easy-to-maintain SeaPro commercial motors deliver reliable starts and improved fuel efficiency. Calibrated to reach maximum torque at lower rpms, they provide more power with less stress on the motor. Get on plane faster – and stay there longer at lower speeds.

SKU: SeaPro 15 HP - 20 in. Shaft Categories: , ,



  • The rugged new 15hp SeaPro is designed and built to take on big jobs in smaller boats. It’s engineered to be durable and is designed for extended life of the engine. For commercial fishing vessels and commercial workboats.
  • Corrosion Resistance: Mercury’s proprietary formula – XK360, is an extremely low copper content aluminium alloy, which leads the industry in corrosion resistance. This makes costly corrosion failures and high labour bills a thing of the past. Most competitors use alloys with 2% to 4% copper content which will corrode faster than our MercAlloy, XK360 or A356 alloys.
  • Repower with SeaPro: The compact size also means older boats not initially designed for the weight of heavier four-stroke outboards can now be repowered and reborn to perform at their best with the latest technology.


  • HP / kW: 15 / 11.1
  • Displacement (CID/CC): 20.3cid / 333cc
  • Cylinder Configuration: I-2
  • Full throttle RPM: 4,500 – 5,500
  • Fuel induction system: Single Overhead Cam
  • Alternator amp / Watt: 12/145 electric
  • Recommended fuel: 87% octane / up to 10% ethanol
  • Recommended oil: 25W-40 Synthetic Blend; Mercury FC-W 10W-30 4-Stroke Marine Oil
  • Engine protection operator warning system: Low oil pressure; Over-rev; Overheat; Sensor failure
  • Starting: Electric; Manual
  • Steering: Remote; Tiller
  • Shaft length: 20″ / 508 mm
  • Gearcase ratio: 2.15:1
  • Dry weight *Lightest model available: 99/45
  • CARB star rating: 3
  • Bore and stroke: 2.40 x 2.24 / 61 x 57
  • Ignition: CDI w/electronic spark advance
  • Fuel system: Electronic Fuel Injection (EFI)
  • Cooling system: Water-cooled with thermostat
  • Gear shift: F-N-R
  • Gearcase options: Standard
  • Trim system: Manual
  • Trim positions: 6 Manual
  • Exhaust system: Through prop
  • Shallow water drive: Yes
  • Remote fuel tank (optional): Yes
  • Remote fuel tank standard (gal / L): 6.6 / 25
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