1946 Evinrude 5.4 HP Ranger Outboard Specs & Part Numbers
Evinrude 5.4 HP Ranger (1946) Technical Guide
The 1946 Evinrude Ranger is a classic representative of post-World War II marine engineering. Boasting a 5.4 horsepower rating, this alternate-firing twin-cylinder outboard motor was designed for reliability, portability, and smooth low-speed trolling. Today, it is a highly sought-after model for vintage outboard restorers and enthusiasts who appreciate its robust mechanical design and historic character.
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Overview & Specifications
Released immediately following the lift of wartime manufacturing restrictions, the 1946 Evinrude Ranger (typically designated under model family 4403) refined pre-war twin-cylinder designs. Below are the primary technical specifications for this model:
| Specification | Detail |
|---|---|
| Horsepower | 5.4 HP @ 4,000 RPM |
| Configuration | Alternate Firing Twin (2-Cylinder, 2-Stroke) |
| Displacement | 8.24 Cubic Inches (approx. 135 cc) |
| Bore & Stroke | 1.875″ Bore x 1.500″ Stroke |
| Fuel/Oil Ratio | 16:1 (1/2 pint of oil per 1 gallon of regular gasoline) |
| Fuel Type | 87 Octane (Non-Ethanol highly recommended to preserve vintage seals/carburetor components) |
| Oil Type | TC-W3 Two-Stroke Outboard Oil (or vintage-appropriate SAE 30 Non-Detergent Motor Oil) |
| Weight | Approximately 42 lbs (19 kg) |
| Ignition System | Flywheel Magneto (Eisemann or Bendix-Scintilla) |
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Common Maintenance & Tune-up Specs
Keeping a vintage Ranger running smoothly requires periodic attention to the ignition, fuel system, and lower unit. Because these motors lacked modern electronic ignition components, physical tolerances are critical.
Ignition System Settings
- Spark Plug Type: Champion J8C (or vintage Champion J8 equivalent)
- Spark Plug Gap: 0.025 inches (0.63 mm)
- Points Gap: 0.020 inches (0.51 mm) — set at highest point of cam lobe lobe.
- Condenser Capacity: 0.18 to 0.22 Microfarads
Cooling & Water Pump Maintenance
Unlike modern outboards with rubber impellers that are easily swappable, this era of Evinrude utilizes a positive displacement wobble-plate or rotor-style pump, or a simple centrifugal pump depending on the exact sub-model run.
- Impeller/Rotor Check: If the motor has sat unused, inspect the water pump housing inside the lower unit gearcase. Look for scale build-up, debris, or a deteriorated rubber rotor/vane.
- Symptom of Failure: Lack of water spraying from the relief holes on the back of the midsection column. Ensure these passages are clear of mineral deposits and mud-dauber nests before running.
- Running warning: Never run this motor “dry” on a stand. Always submerge the lower unit in a barrel of water past the water pump level to avoid frying the pump and overheating the cylinders.
Lower Unit Lubrication
Vintage gearcases do not feature modern rubber lip seals. Instead, they rely on mechanical tolerances and heavy lubricants to keep water out.
- Lubricant Type: Do not use thin, modern 90W gear oil; it will leak past the loose tolerances of the prop shaft. Use a semi-fluid grease such as Lubriplate 105 (or equivalent vintage outboard gear grease).
- Filling Procedure: Remove both the “Fill” and “Drain” plugs. Force the grease into the lower plug hole until it expels cleanly out of the top vent hole, ensuring no air pockets remain.
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Notable Features & History
The Evinrude Ranger 5.4 HP represents a pivotal era in recreational boating history. As millions of soldiers returned home from World War II, outdoor recreation exploded in popularity. Evinrude positioned the Ranger as the perfect mid-power outboard for family fishing boats and dinghies.
1. Alternate Firing Twin Design
Before the alternate firing design became industry-standard, many older outboards were “opposed twins” which fired both cylinders simultaneously. The Ranger’s alternate-firing design (where one cylinder fires, then the other 180 degrees later) dramatically reduced engine vibration. This made the motor significantly quieter, minimized transom fatigue on wooden boats, and allowed for incredibly smooth slow-speed trolling.
2. The “Simplex” Recoil Starter
While many budget motors of the era still required the operator to manually wind a loose rope around the flywheel every time they wanted to start the engine, the Ranger featured the premium Simplex recoil starter. This self-retracting rope starter was integrated directly on top of the flywheel shroud, making operation safer, faster, and much more user-friendly.
3. “Co-Pilot” Steering Tensioner
Designed with fishermen in mind, the Ranger featured a mechanical friction adjustment on the steering pivot (the “Co-Pilot”). This allowed the operator to set a desired course, tighten the tensioner, and let go of the steering handle to tend to fishing lines or gear without the motor immediately veering off-course.
4. Integral Fuel Tank & Carburetion
The motor features a beautifully styled, polished aluminum wrap-around fuel tank integrated directly onto the powerhead. It utilizes a gravity-fed carburetor system featuring a high-speed and low-speed needle adjustment on the front control panel. This simple, vacuum-pulse-free fuel delivery system is highly reliable and easy to clean with basic hand tools.