Gale Model 12D11 Outboard Motor Specs & Overview

Produced by Gale Products—a famed division of Outboard Marine Corporation (OMC)—the Gale Model 12D11 is a quintessential mid-century 12 horsepower outboard motor. Gale outboards were renowned for offering OMC’s bulletproof engineering and reliability at a more accessible price point than their Johnson and Evinrude siblings. Featuring a robust twin-cylinder powerhead and full gearshift capabilities, the 12D11 remains a favorite among vintage boating enthusiasts and collectors today.

Technical Specifications

• Model: 12D11
• Horsepower: 12.0 HP @ 4000 RPM (O.B.C. Certified)
• Operating RPM Range: 3500 – 4500 RPM
• Cylinders: 2-cylinder, 2-cycle alternate firing
• Displacement: 17.89 cu. in.
• Bore & Stroke: 2-1/4″ Bore x 2-1/4″ Stroke
• Gear Shift: Forward – Neutral – Reverse (F-N-R)
• Gear Ratio: 12:21
• Propeller: 3-Blade, 9″ Diameter x 11″ Pitch
• Ignition: Built-in Flywheel Magneto
• Carburetor: Concentric float type with adjustable high and low-speed needle valves, automotive-style choke
• Speed Control: Synchronized spark and throttle with twist-grip control
• Cooling System: Positive and centrifugal synthetic rubber rotor (impeller)
• Starter: Automatic rewind with nylon cord
• Fuel Capacity: 2 Gallon tank (approx. 1 hour running time at full throttle)
• Weight: 69.5 lbs.
• Transom Height: 15 Inches (Standard Short Shaft)

Fuel-to-Oil Mixture Guidelines

Because the Gale 12D11 utilizes vintage needle and sleeve bearings, proper lubrication is essential to prevent engine seizure. Use a 24:1 fuel-to-oil ratio (1 quart of oil to 6 gallons of gas, or 5.3 oz of oil per gallon of gas). Always use a quality TC-W3 rated 2-stroke marine oil mixed with non-ethanol (87 octane or higher) gasoline. Avoid modern E10 fuel when possible, as ethanol can degrade vintage fuel lines, carb floats, and internal gaskets.

Restoration & Maintenance Advice

Restoring a Gale 12D11 is a rewarding project due to the broad availability of shared OMC mechanical components. Key areas to focus on during inspection and overhaul include:

• Cooling System: Never run the motor dry. The lower unit relies on a synthetic rubber impeller. Before putting a newly acquired motor in the water, drop the lower unit and replace the water pump impeller, as vintage rubber hardens and breaks apart over time.
• Ignition Service: The magneto system typically uses standard OMC ignition components. Inspect the ignition coils for cracking in the plastic casing. Set the breaker point gaps to 0.020 inches and inspect ignition wires for brittleness.
• Carburetor Rebuild: Remove and clean both the high-speed (main) and low-speed (idle) needle valves. Ensure the concentric float operates freely and isn’t fuel-logged. Adjust needle valves to starting positions (typically 1.5 turns out for low speed, 3/4 to 1 turn out for high speed) before fine-tuning under load in the water.
• Gearcase Care: Drain and inspect the gearcase lube. If the gear oil appears milky, the lower unit seals or shaft O-rings need replacement. Refill using a quality marine lower unit gear lube (80W-90 non-corrosive gear oil).