JOHNSON KA-38 Antique Outboard Boat Motor Carb Carburetor 9.3HP

( Manufacturer Part Number: KA-38 ), ( Part Type: Motor Carburetor ), ( Country Of Origin: United States )

Review JOHNSON Antique 9.3hp Outboard Boat Motor Carb Carburetor Assembly fits 1938

The **Johnson Ka-38 Antique Outboard Motor (1938, 9.3 HP)** is a meticulously crafted relic from the golden age of boating, embodying both engineering ingenuity and timeless design. Produced in the late 1930s by the legendary Johnson Outboard Motor Company, this rare and highly sought-after motor represents the pinnacle of early outboard technology, blending simplicity with remarkable performance for its era. With its classic **Ka-series** designation, the Ka-38 stands out as a compact yet powerful engine, delivering a smooth **9.3 horsepower** plenty of punch for small boats, fishing vessels, or even classic runabouts of the period. The motor s **cast aluminum cowling** features a streamlined, aerodynamic shape with a distinctive **vertical exhaust stack**, a hallmark of Johnson s early designs, while the **handcrafted brass components** including the **single-cylinder, two-stroke engine** exude an unmistakable vintage charm. The **manual choke and pull-start mechanism** offer a nostalgic, hands-on experience, requiring a touch of skill to coax the motor to life, much like the outboard enthusiasts of the 1930s and 1940s did. At the heart of the Ka-38 lies its **carburated induction system**, featuring a **single-barrel carburetor** with a polished chrome body and a **floating bowl**, designed to deliver precise fuel-air mixtures for optimal combustion. The **direct-drive propeller shaft** and **gear-driven reduction system** ensure efficient power transfer, while the **oil bath air filter** (a precursor to modern paper filters) helps protect the engine from debris a practical yet elegant solution for its time. Whether displayed as a centerpiece in a boating museum, restored for classic boat enthusiasts, or carefully preserved as a collector s item, the Johnson Ka-38 is more than just an engine; it is a tangible piece of maritime history, embodying the innovation and craftsmanship that defined an era. For those who appreciate mechanical artistry and the romance of vintage machinery, this motor is a true treasure a testament to the ingenuity of early outboard pioneers.

### **Pros and Cons of Buying a Johnson KA-38 (1938, 9.3HP) Outboard Motor**

1. **Historical and Collectible Value** The KA-38 is a rare and well-preserved example of an early Johnson outboard, making it a desirable piece for collectors. Its vintage design reflects a key era in small-engine history.

2. **Mechanical Simplicity** Early Johnson outboards were built with straightforward, durable components, often using cast iron and brass parts that were designed to last with proper maintenance.

3. **Potential for Restoration** If you enjoy mechanical work, restoring this motor could be a rewarding project. Many parts may still be available through Johnson or aftermarket suppliers.

4. **Unique Aesthetic Appeal** The motor s vintage design, including its cast-iron housing and manual controls, gives it a nostalgic charm that modern outboards lack.

5. **Possible Low Purchase Price** Due to its age and rarity, the cost may be relatively low compared to newer outboards, especially if it s in rough condition.

6. **Learning Opportunity** Working on this motor could provide insight into early marine engineering, fuel systems, and manual ignition mechanisms.

1. **Extreme Age and Wear** At 85 years old, the motor is likely to be in poor condition, with worn bearings, corroded internals, and degraded rubber components. Restoration may require extensive parts replacement.

2. **Lack of Modern Reliability** Early outboards were not built with the same durability standards as modern engines. Rust, cracked casings, and seized components are common issues.

3. **Fuel and Ignition Challenges** The carburetor and manual ignition system (likely a magneto or coil) may be difficult to source or repair. Modern fuel blends and ignition components may not be compatible.

4. **No Warranty or Support** Johnson no longer produces this model, so there is no manufacturer support, warranty, or availability of original parts. Aftermarket parts may be scarce or expensive.

5. **Safety Concerns** Modern safety standards (e.g., fuel shutoffs, corrosion-resistant materials) did not exist in 1938. Running this motor could pose risks if not properly maintained.

6. **Limited Practical Use** Unless you plan to restore it purely for display or as a project, its performance will be unreliable compared to modern outboards. It may not be suitable for regular boating.

7. **Environmental and Legal Issues** Older engines often do not meet modern emissions standards. Operating it may violate local boating regulations, especially in protected waterways.

8. **High Maintenance Costs** Restoring or repairing this motor could be expensive due to the need for custom machining, rare parts, or labor-intensive work.

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### **Conclusion and Recommendation**

The Johnson KA-38 is a fascinating piece of mechanical history, but its practical value as a functional outboard is limited. If you are **primarily interested in collecting, restoring for display, or learning about vintage engineering**, this motor could be a worthwhile project provided you are prepared for the extensive work and potential costs involved.

However, if you are looking for a **reliable, safe, and functional outboard motor for boating**, this is not a practical choice. Modern outboards, even older but well-maintained ones (e.g., 1970s 1990s Johnson/Evinrude), offer far better performance, ease of repair, and compliance with regulations.

- **Buy only if:** You are a serious restorer with mechanical expertise, have access to rare parts, and are willing to invest significant time and money into bringing it back to working condition primarily for display or educational purposes.

- **Avoid if:** You need a functional motor for regular use, want minimal hassle, or are not prepared for the challenges of working on an 85-year-old engine.

For most buyers, a well-documented vintage outboard from the 1960s 1980s (with known service history) would be a far more practical and enjoyable purchase.

Details:

Up for sale is a carb / carburetor assembly off of 1938 Johnson KA-38 9.3HP outboard boat motor. Used condition and shows marks wear. Drum and needles turn otherwise untested. See pictures.

part #: ka38 prices

• $5.00-$24.95

specifications ouboaen:

• for makes: Johnson
• for years: 1938
• mpn: Ka-38
• part type: Motor Carburetor
• country of origin: United States

returns ouboaen:

• policy: No Returns

seller ouboaen:

• # reviews: 3683
• city: Rush City, Minnesota
• rating: 99.9%

shipping ouboaen:

• carrier: USPS
• class: Standard
• transit: 3-8 Days
• service: USPS Ground Advantage
• cost: $10.00
• type: Fixed

payments ouboaen:

• wallet: Paypal
• credit card: Visa
• other

offer ouboaen:

• options: Ship-to-home
• quantity: 1
• best offers: True
• sold: 0
• started: March 24, 2026
• availability: In Stock

general ouboaen:

• condition: Used
• Boat Parts > Outboard Engines Components > Other

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