Gale Model 12D17 Outboard Motor Specs & Overview

Overview of the Gale 12D17 12 HP Outboard Motor

Gale Products was a prominent division of Outboard Marine Corporation (OMC), manufacturing dependable and economical outboard motors from the late 1930s through the early 1960s. Operating alongside OMC’s flagship Johnson and Evinrude brands, Gale supplied motors directly under their own brand name—such as the Gale Buccaneer—and produced badged models for major department stores and mail-order retailers, including Montgomery Ward (Sea King) and Goodyear. The Gale Model 12D17 is a classic mid-range 12 horsepower twin-cylinder outboard engineered for smooth running, durable utility, and easy field service.

Key Technical Specifications

• Model: 12D17
• Horsepower: 12.0 HP @ 4000 RPM (O.B.C. Certified)
• Operating Range: 3500 – 4500 RPM
• Cylinders: 2 cylinders
• Bore & Stroke: 2-1/4″ Bore x 2-1/4″ Stroke
• Displacement: 17.89 Cubic Inches
• Powerhead Type: 2-cycle, 2-port, alternate firing
• Gear Shift Control: Forward – Neutral – Reverse (F-N-R)
• Gear Ratio: 12:21
• Propeller: 3-Blade, 9″ Diameter x 11″ Pitch
• Cooling System: Positive and centrifugal synthetic rubber rotor impeller
• Ignition System: Built-in flywheel magneto
• Carburetor: Concentric float type with adjustable fast and slow speed needle valves, automotive-style choke
• Speed Control: Twist grip with synchronized spark and throttle
• Starter: Automatic rewind recoil starter
• Fuel Tank Capacity: 6 Gallons (external tank, approx. 3 hours run time)
• Weight: 77.5 lbs (less tank)
• Transom Height: 15 Inches (standard short shaft)

Maintenance, Restoration, and Fuel Mix Guidelines

Restoring and maintaining a vintage OMC-built Gale outboard is a rewarding project due to excellent parts availability and simple, robust engineering. Below are critical maintenance steps to keep your Gale 12D17 running reliably on the water.

1. Fuel-to-Oil Ratio Mix
Unlike modern outboards that run thin fuel mixtures, vintage 2-stroke motors rely heavily on fuel-borne oil to lubricate internal bronze bushings and bearings.
For the Gale 12D17, run a 24:1 fuel-to-oil ratio using modern TC-W3 marine two-stroke oil mixed with standard unleaded gasoline (preferably ethanol-free). That breaks down to 1 quart (32 oz) of TC-W3 oil per 6-gallon tank of gas. Avoid running leaner mixes (such as 50:1) unless the powerhead has been completely rebuilt with updated needle bearings throughout.

2. Ignition System Overhaul
The flywheel magneto system is straightforward to service. Common issues with motors of this era include cracked ignition coils and corroded breaker points.

• Remove the flywheel using a proper harmonic puller to prevent cracking the cast iron flywheel or damaging the crankshaft threads.
• Inspect the twin ignition coils; original green coils frequently crack with age and should be replaced with modern OMC/Universal replacement coils.
• Clean or replace the contact points, setting the gap precisely to .020 inches.
• Replace the condensers to ensure a strong, blue spark across both cylinders.

3. Cooling System & Water Pump Impeller
Never run the motor out of water, even briefly. The synthetic rubber impeller inside the lower unit gear housing provides critical cooling water to the powerhead. Old impellers become brittle or set in a permanent set, leading to severe powerhead overheating. Always install a fresh rubber impeller during restoration and verify a steady stream of discharge water from the relief ports while running.

4. Carburetor & Fuel Delivery
The concentric-float carburetor features manual high-speed and low-speed needle valves, allowing fine tuning for optimal idle and wide-open throttle performance. Disassemble the carburetor, clean all internal passages with carb cleaner, install a new cork/nitrile float bowl gasket, and replace hardened fuel lines. Initial needle settings generally start at 1-1/2 turns open for the slow-speed needle and 3/4 to 1 turn open for the high-speed needle, fine-tuned once the motor reaches operating temperature under load.

5. Lower Unit Gearcase Care
Drain the gearcase lubricant and inspect for metal shavings or milky contamination, which indicates failing prop shaft or drive shaft seals. Refill the gearcase from the bottom drain hole upward using standard marine hypoid outboard gear lube until it flows out of the top vent hole.