Gale Model 25D19 Outboard Motor Specs & Overview

Overview of the Gale 25D19 Outboard Motor

Gale Products, a former division of the Outboard Marine Corporation (OMC), produced reliable, no-nonsense outboard motors throughout the mid-20th century. While OMC’s flagship Johnson and Evinrude brands often featured the latest styling cues and luxury options, Gale motors were designed as rugged, dependable workhorses. They were sold both under the Gale brand name and under private labels such as Sea King (Montgomery Ward) and Buccaneer.

The Gale Model 25D19 is a classic twin-cylinder, 25-horsepower outboard motor built during the peak of OMC’s post-war boating boom. Featuring full forward-neutral-reverse gearshifting, a separate 6-gallon fuel tank, and standard twist-grip control, the 25D19 offers excellent torque and reliability for vintage aluminum boats, runabouts, and utility craft.

Key Technical Specifications

• Model: Gale 25D19
• Horsepower Rating: 25.0 HP @ 4,500 RPM (O.B.C. certified)
• Operating RPM Range: 4,000 to 5,000 RPM
• Cylinders: 2 cylinders, alternate firing
• Bore and Stroke: 2-7/8″ bore x 2-3/4″ stroke
• Displacement: 35.7 cubic inches
• Powerhead Type: 2-cycle, 2-port
• Gear Ratio: 12:21
• Propeller: 3-blade, 10-3/8″ diameter x 12-1/2″ pitch
• Cooling System: Rubber blade combination displacement and centrifugal water pump
• Ignition System: Built-in flywheel magneto
• Carburetor: Float feed with adjustable high-speed and low-speed needle valves
• Control System: Twist-grip control with synchronized spark and throttle
• Starting: Automatic rewind manual starter
• Gearshift: Full Gearshift (Forward – Neutral – Reverse)
• Fuel Capacity: 6-gallon separate remote fuel tank
• Weight: 115 lbs. (without tank)
• Recommended Transom Height: Fits 15″ or 20″ transom applications

Maintenance and Restoration Guidelines

Restoring or maintaining a vintage Gale 25D19 requires attention to a few critical areas typical of 1950s OMC architecture:

• Cooling System: Before running a motor that has been sitting, always inspect and replace the rubber water pump impeller. Running a dry pump for even a few seconds can ruin the rubber blades, leading to severe powerhead overheating. Ensure the cooling passages in the cylinder head are free from salt build-up or debris.
• Ignition Service: The flywheel magneto uses standard OMC ignition components (points, condensers, and high-tension coils). Vintage coils from this era are notorious for cracking over time due to thermal breakdown of the original epoxy coating. Replacing the coils, setting the breaker point gap to .020″, and cleaning the ground surfaces will ensure strong spark across both cylinders.
• Fuel System & Carburetor: Rebuild the float-feed carburetor with modern fuel-resistant gaskets and a new needle/seat. Check the high and low-speed adjustment needles for groove damage from over-tightening. Set the initial low-speed needle at approximately 1-1/2 turns out and the high-speed needle at 3/4 to 1 turn out before fine-tuning on the water.
• Gearcase Maintenance: Drain and inspect the lower unit lubricant. If the fluid appears milky or contains metallic shavings, replace the lower unit shaft seals, shift rod O-rings, and drain plug washers. Refill using modern Marine Hi-Vis gear lube.

2-Stroke Fuel Mix & Oil Ratio

Because the Gale 25D19 uses bronze bushings and early needle bearing construction in its powerhead, it requires a higher concentration of oil than modern 50:1 outboards.

The recommended fuel-to-oil mixture for this engine is 24:1 (1 quart of high-quality TC-W3 marine two-stroke oil to 6 gallons of gasoline). Using a leaner mix, such as 50:1, risks severe damage to internal crankshaft bearings and cylinder walls.

Always use 87-octane non-ethanol regular gasoline whenever possible. Ethanol blends degrade vintage rubber fuel lines, destroy original cork carburetor floats, and attract moisture that leads to internal corrosion during off-season storage.