Description
Mercury 1A10451LK 9.9hp Command Thrust ProKicker EFI FourStroke – 20" Shaft (Tiller, Electric Start, Power Tilt)
The Mercury 1A10451LK is a 9.9hp ProKicker FourStroke built for precise low-speed control and dependable starting. This configuration pairs Electronic Fuel Injection (EFI) with the Command Thrust (CT) gearcase, plus tiller steering, electric start, and power tilt on a 20" (long) shaft.
Applications
- Auxiliary/kicker outboard for controlled trolling speeds and boat positioning
- Boats that benefit from higher-thrust gearcase performance at low speed (Command Thrust/CT)
- Owners who want EFI convenience (consistent starts, smooth operation) in a small FourStroke platform
Key Facts
Manufacturer: Mercury Marine
MPN / Model Number: 1A10451LK
Model / Series: 9.9ELHPT Command Thrust ProKicker EFI FourStroke
Horsepower: 9.9
Engine Type: Inline 2-cylinder FourStroke
Displacement: 209 cc
Bore x Stroke: 55 x 44 mm
Fuel System: Electronic Fuel Injection (EFI)
Steering / Controls: Tiller
Starting: Electric
Shaft Length: 20" (Long)
Trim System: Power Tilt
Gearcase: Command Thrust (CT)
Gear Ratio: 2.15:1
WOT Range: 5700–6200 RPM
Alternator Output: 12A / 145W
Gear Shift: F-N-R
Cooling System: Water-cooled with thermostat
Fuel Recommendation: 87 octane (up to 10% ethanol)
Weight (Published Listings): Varies by published listing/config; commonly listed around 115 lb, with some listings stating 100 lb “dry weight”
What’s Included
Outboard Motor: Mercury 1A10451LK (9.9ELHPT CT ProKicker EFI FourStroke)
Propeller: Yes
Fuel Tank: External/remote tank setup (Not Included on CT)
Service Notes
- Confirm your transom height before ordering: this model is a 20" (long) shaft configuration.
- Because this is an electric-start model with alternator output, plan your battery/charging and wiring accordingly.
- Follow Mercury’s break-in and maintenance schedule and use the manufacturer-recommended oils and lubricants.