MERCURY 398-175A2 Stator Magneto Motor Outboard

( Manufacturer Part Number: 398-175A2 ), ( Part Type: Stator Magneto Motor ), ( Country Of Origin: United States )

Review MERCURY Stator Magneto Motor Outboard fits MARK 1956–2025

The **Mercury 398-175A2 1956 25-Stator Magneto Motor Outboard** is a rare and highly sought-after piece of vintage marine engineering, embodying the golden era of American outboard motor design. Built in the mid-20th century, this model exemplifies Mercury Marine s pioneering advancements in small-block outboard technology, blending durability with innovative performance. The **25-stator magneto motor** a hallmark of its era features a robust, cast-iron cylinder block paired with a precision-machined aluminum crankcase, ensuring both strength and lightweight efficiency. The **1956 model year** marks a transitional phase in Mercury s evolution, where the company refined its early designs while introducing subtle yet meaningful improvements in ignition reliability and fuel delivery. This particular outboard is equipped with a **single-cylinder, two-stroke engine**, delivering a smooth yet powerful 175 cubic inch displacement, capable of propelling small to mid-sized boats with surprising agility for its time. The **magneto ignition system** a defining characteristic of vintage Mercurys eliminates the need for a battery, relying instead on a self-contained coil to generate sparks, a testament to the ingenuity of early marine engineers. The **motor s drive unit** is designed with a direct-drive propeller shaft, allowing for efficient power transfer with minimal loss, while the **oil-injection system** (if present) ensures consistent lubrication, reducing wear on critical components. Though now over six decades old, this outboard retains much of its original functionality, provided it has been properly maintained, making it a fascinating piece for collectors, restorers, and enthusiasts of classic marine machinery. Whether used for leisurely cruising, fishing, or as a centerpiece in a vintage boat restoration project, the **Mercury 398-175A2** stands as a relic of an era when outboard motors were both cutting-edge technology and symbols of American ingenuity. Its historical significance, combined with its mechanical charm, makes it a prized addition to any collection of early marine power.

### Pros and Cons of Buying a Mercury 398-175A2 1956 25 Stator Magneto Motor Outboard

1. **Classic and Collectible Value** The 1956 Mercury outboard is a rare and historically significant model, particularly the 25 HP magneto-powered version. Its vintage design makes it appealing to collectors and enthusiasts who appreciate early outboard motors. The 398-175A2 stator is a key component, and original or well-maintained parts can increase in value over time.

2. **Historical and Mechanical Interest** For those fascinated by the evolution of marine engines, this motor offers a glimpse into early outboard technology. The magneto ignition system, while less common today, provides a unique learning experience for mechanics and hobbyists.

3. **Potential for Restoration** If the motor is in need of restoration, this can be a rewarding project. Many parts, tools, and knowledge exist for restoring vintage Mercuries, and a well-restored example could become a prized possession or even a functional piece of equipment for smaller boats.

4. **Low Operating Costs (If Running)** Vintage outboards like this often have simpler designs compared to modern engines, which can mean fewer electronic components to fail. If the motor is in good working condition, fuel and maintenance costs may be relatively low.

5. **Nostalgia and Aesthetic Appeal** The retro look of the 1956 Mercury aligns with a vintage aesthetic, making it a conversation piece for boat owners who enjoy classic designs. It could also be a unique addition to a collection of antique machinery.

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1. **High Maintenance and Reliability Concerns** Vintage outboards, especially those over 60 years old, are prone to wear, corrosion, and mechanical failure. The magneto system, while robust, may require frequent adjustments or replacements of components like spark plugs, points, or the magneto itself. Rust in the lower unit or fuel system is a common issue.

2. **Limited Availability of Parts and Expertise** Finding original or compatible parts for a 1956 Mercury can be difficult. While some specialty marine shops or collectors may have what you need, sourcing parts may require extensive research or purchasing from private sellers. Additionally, mechanics with experience in vintage outboards are less common than those who work on modern engines.

3. **Fuel and Emissions Challenges** Older outboards were not designed with modern fuel standards in mind. Lead-based fuel (common in the 1950s) can damage modern engines, and modern fuels may not perform as well in vintage carburetions. Emissions regulations also mean that running this motor in some areas may be restricted or require modifications.

4. **Performance Limitations** The 25 HP output is modest by today s standards, making it suitable only for very small boats or as a secondary engine. It lacks the power and efficiency of modern outboards, which can be a significant drawback for practical use.

5. **Cost of Restoration vs. Replacement** If the motor is in poor condition, the cost of restoring it to working order could be prohibitive. In many cases, restoring a vintage outboard may cost more than purchasing a used modern outboard with similar power. Additionally, insurance and liability concerns may arise if the motor is used on a boat, as vintage engines may not meet modern safety standards.

6. **Legal and Operational Restrictions** Some marinas, rental companies, or regulatory bodies may prohibit the use of vintage outboards due to emissions, noise, or safety concerns. Before purchasing, research local laws and whether the motor can be legally operated on the water.

7. **Time-Consuming Use** Starting and running a vintage outboard often requires more effort than modern engines. Cold starts, fuel priming, and manual adjustments (e.g., carburetor tuning) can make it less convenient for regular use.

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Buying a Mercury 398-175A2 1956 25 stator magneto motor outboard is a decision that hinges on whether you prioritize **collectibility, historical interest, or restoration potential** over practical functionality. If you are a collector, a mechanic with restoration skills, or someone who appreciates vintage machinery, this motor could be a worthwhile investment. However, if you need a reliable, low-maintenance engine for regular boating, the costs, challenges, and limitations of a 60-year-old outboard make it a less practical choice.

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- **Buy for Collection or Restoration:** If you are committed to restoring the motor as a hobby or preserving it as a historical piece, proceed with caution. Budget for potential hidden repairs (e.g., rust, worn bearings, or fuel system issues) and invest time in learning about vintage outboard maintenance. Consider joining forums or groups dedicated to Mercury outboards for guidance.

- **Avoid for Practical Use:** Unless you have a specific, small-scale application (e.g., a stationary display, a very light boat, or a project boat where reliability is secondary), the practical drawbacks outweigh the benefits. Modern outboards, even used ones, offer better performance, lower maintenance, and greater availability of parts.

- **Test Before Buying:** If possible, inspect the motor thoroughly or have it professionally evaluated before purchasing. Look for signs of rust, leaks, or mechanical wear. A pre-purchase inspection by someone experienced with vintage outboards is highly recommended.

- **Alternative Options:** If you want a similar vintage experience with fewer hassles, consider newer classic outboards (e.g., late 1960s 1970s Mercuries or Evos) that are more common and easier to maintain. For modern convenience, a used 5 15 HP outboard (e.g., Yamaha, Evinrude, or Johnson) would be a far more practical choice.

Ultimately, this motor is best suited for enthusiasts rather than everyday boaters. Weigh your priorities carefully before making a purchase.

Details:

MERCURY PART #398-175A2. CAME OFF PARTED OUT 1956 MERCURY MARK 25 OUTBOARD MOTOR.

part #: 398175a2 prices

• $124.00-$1500.00

specifications ouboaen:

• for models: Mark
• for makes: Mercury
• for years: 1956-2025
• mpn: 398-175a2
• part type: Stator Magneto Motor
• country of origin: United States

seller ouboaen:

• city: Kawkawlin, Michigan
• rating: 100.0%
• # reviews: 14319

offer ouboaen:

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

general ouboaen:

• Boat Parts > Outboard Engines Components > Ignition Starting Systems
• condition: For parts or not working

shipping ouboaen:

• transit: 4-8 Days
• cost: $0.00
• class: Standard, Expedited
• type: Calculated
• carrier: USPS, FedEx, UPS
• service: USPS Ground Advantage, FedEx Ground / FedEx Home Delivery, UPS Ground, USPS Priority Mail

returns ouboaen:

• policy: Returns Accepted
• time: 30 Days
• paid by: Buyer

payments ouboaen:

• credit card: Mastercard
• wallet: Paypal
• other

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