API MARINE PT112N-NP-2 J/e 75-135 O/b

( Brand: Api Marine ), ( Manufacturer Part Number: PT112N-NP-2 ), ( Part Type: Hp ), ( Custom Bundle: No ), ( Country Of Origin: United States )

Review API MARINE Pt112n Replaces Omc J/e Chrysler Us 75-135 Hp O/b fits FORCE 1972

The **API Marine PT112N-NP-2** is a premium, high-performance marine engine oil specifically formulated to deliver outstanding protection and longevity for classic and modern outboard motors, including the legendary **OMC J/2 Chrysler Force engines** produced from **1972 through 1975**, covering a power range of **75 to 135 horsepower** in both two-stroke and four-stroke configurations. Engineered with advanced synthetic and semi-synthetic base stocks, this oil provides superior thermal stability, ensuring consistent viscosity and lubrication even under the extreme heat and stress of high-performance marine applications. Its **NP-2 (Non-Petroleum)** designation confirms that it contains no petroleum-derived additives, making it ideal for engines where purity and performance are critical, particularly in older or high-end outboards where contamination from traditional oils could accelerate wear or clog delicate components.

The **PT112N-NP-2** stands out for its **full synthetic formulation**, which minimizes sludge formation, reduces friction, and enhances fuel efficiency key benefits for the **Chrysler Force** engines, which were known for their robust yet finicky nature when subjected to prolonged use or harsh conditions. This oil s **high flash point** ensures safer operation, reducing the risk of ignition under high-temperature conditions, while its **excellent oxidation resistance** helps prevent the breakdown of additives over time, maintaining peak performance even during extended storage or seasonal use. Additionally, its **superior detergent and dispersant properties** keep the engine clean by suspending contaminants and preventing deposits on critical surfaces, such as pistons, valves, and cylinder walls a crucial feature for the **J/2 series**, which was prone to carbon buildup and wear if not properly maintained.

Designed for **over-the-bow (O/B) applications**, the **PT112N-NP-2** excels in environments where engines are exposed to water, salt, and debris, offering enhanced corrosion protection for aluminum and other sensitive metals. Its **low volatility** ensures minimal oil consumption, reducing the need for frequent top-ups, while its **superior film strength** provides a durable protective barrier against metal-to-metal contact, even under heavy loads or sudden acceleration. Whether used in **fishing boats, speedboats, or classic cruisers**, this oil delivers the reliability and performance demanded by enthusiasts who demand nothing less than excellence from their **OMC J/2 Chrysler Force** engines. With its **API-certified marine specifications** and compatibility with modern and vintage outboard technologies, the **PT112N-NP-2** is not just an oil it s a performance-enhancing solution that helps preserve the integrity and longevity of one of the most iconic marine powerplants of the 1970s.

### **Pros and Cons of Buying a 1972 API Marine PT112N-NP-2 (OMC J/E Chrysler Force, 75 135 HP, Outboard-Bottom)**

#### **Pros**

1. **Reliability and Durability**

The PT112N-NP-2 is a classic outboard motor from the early 1970s, known for its robust construction. Chrysler s OMC (Original Motor Corporation) engines were built to last, and many still function well with proper maintenance. The cast-iron block and simple mechanical design make it easier to repair than modern fuel-injected engines.

2. **Proven Performance**

With a power range of 75 135 HP (depending on model year and trim), this motor was designed for mid-sized boats, offering strong acceleration and steady cruising power. It performs well in both freshwater and saltwater environments, though saltwater requires extra care to prevent corrosion.

3. **Affordability**

Parts and labor for this engine are significantly cheaper than modern outboards. A complete rebuild kit, gaskets, and basic components can often be sourced for under $500, whereas equivalent parts for newer engines cost much more. Even a used PT112N can be purchased for a fraction of the price of a new mid-sized outboard.

4. **Simplicity and Accessibility**

The design is straightforward, with no complex electronics or fuel injection systems. This makes troubleshooting and repairs easier for those with mechanical skills. Common issues like carburetor adjustments, ignition timing, and basic mechanical failures are manageable with basic tools.

5. **Classic Vibe and Nostalgia**

For enthusiasts who appreciate vintage marine engines, the PT112N has a nostalgic appeal. It s a piece of boating history, and restoring one can be a rewarding hobby. Many boat owners enjoy the challenge of maintaining a classic engine alongside a modern vessel.

6. **Good for Small to Medium Boats**

The PT112N was designed for boats in the 16 20-foot range, making it suitable for bass boats, runabouts, or small fishing vessels. Its weight (around 200 250 lbs dry) is manageable for most small boats, and its power-to-weight ratio is adequate for its intended use.

7. **Ease of Modifications**

Unlike modern outboards with sealed systems, the PT112N allows for easy modifications such as carburetor upgrades, exhaust tuning, or even swapping in a larger propeller for more power. This flexibility is appealing to those who want to customize performance.

8. **Lower Operating Costs**

Fuel efficiency, while not exceptional by today s standards, is still reasonable for its time. The engine runs on standard gasoline, and basic maintenance (oil changes, spark plugs, and carburetor cleaning) keeps it running smoothly without expensive consumables.

---

#### **Cons**

1. **Age-Related Wear and Tear**

A 1972 engine, even in good condition, will have accumulated wear over decades. Critical components like the crankshaft, bearings, and pistons may require replacement if the motor has seen heavy use. A thorough inspection by a marine mechanic is essential before purchase.

2. **Corrosion Risks**

If the engine has been exposed to saltwater or stored improperly, corrosion can be a major issue. Rust in the lower unit, fuel tank, or exhaust can lead to leaks, reduced performance, or complete failure. A saltwater engine will need more frequent maintenance and possible replacement of corroded parts.

3. **Outdated Technology**

The PT112N lacks modern conveniences like electric start, digital diagnostics, or fuel injection. Starting the engine may require a pull cord, and tuning the carburetor requires skill. This can be frustrating for those accustomed to modern ease of use.

4. **Limited Availability of Parts**

While parts are cheaper than for newer engines, some components (e.g., specific gaskets, seals, or rare hardware) may be harder to find. OMC has largely discontinued production of these engines, so sourcing original parts can be challenging. Aftermarket parts may not always fit perfectly.

5. **Environmental and Emissions Concerns**

The PT112N is a carbureted engine, which means it produces more emissions than modern fuel-injected outboards. In areas with strict boating regulations, it may not meet current environmental standards, though enforcement is often lax for classic engines.

6. **Fuel and Performance Limitations**

The engine s carburetor design is less efficient than modern systems, leading to poorer fuel economy and potential issues with cold starts or high-altitude performance. It may struggle in extreme temperatures or with low-quality fuel.

7. **Safety Considerations**

The lack of modern safety features (e.g., no kill switch on the tiller, minimal vibration dampening) can make handling less intuitive. The open design also means more exposure to water and debris, increasing the risk of damage.

8. **Resale Value**

Unlike newer outboards, the PT112N has little to no resale value. If you decide to upgrade later, selling a classic OMC engine will not recoup much of your investment.

9. **Noise and Vibration**

The engine can be louder and more vibration-prone than modern outboards, which may be noticeable in smaller boats. This can affect comfort and may require additional soundproofing or suspension work.

10. **Legal and Insurance Restrictions**

Some boat insurance policies or registration requirements may not cover older engines, especially if they lack modern safety certifications. Always check with your insurer before purchasing.

---

### **Ending Conclusion**

The **1972 API Marine PT112N-NP-2 (OMC J/E Chrysler Force)** is a **great choice for enthusiasts, budget-conscious buyers, or those seeking a reliable workhorse for small to medium boats**. It offers **affordability, simplicity, and proven performance**, making it ideal for hobbyists who enjoy working on their own engines or for those who prioritize cost-effective marine power. However, it is **not the best option for those who want modern convenience, environmental compliance, or long-term resale value**.

If you are **mechanically inclined, willing to invest time in maintenance, and don t mind the lack of modern features**, this engine can be an excellent addition to your boat. **For casual boaters or those seeking hassle-free performance**, a newer outboard with electronic start, fuel injection, and better emissions control would be a more practical choice.

---

### **Recommendation**

- You are restoring or maintaining a classic boat and enjoy the challenge of working with vintage engines.

- You need a **budget-friendly, high-torque outboard** for a small fishing or utility boat.

- You have **access to a marine mechanic** who can inspect and service the engine before purchase.

- You are **okay with manual starts, carburetor tuning, and occasional repairs** as part of the ownership experience.

- You want **modern convenience** (electric start, digital diagnostics, fuel injection).

- You plan to **boat frequently in saltwater** without proper corrosion prevention measures.

- You are **uncomfortable with mechanical work** or lack access to reliable marine parts.

- You prioritize **environmental compliance, low emissions, or future resale value**.

**Final Verdict:** This engine is a **fantastic investment for the right buyer** someone who appreciates its history, reliability, and cost-effectiveness but it is **not ideal for those seeking a plug-and-play, low-maintenance solution**. Always **inspect the engine thoroughly, test it on the water, and budget for potential repairs** before committing to a purchase.

Details:

Power Trim/Tilt 3-Wire Motor/Res/2-Hose Pump: Coho ref#: 315043 Product condition: This item is brand new in the manufacturers original packaging. In fact, its kind of our thing. Moneybag, Guarantee. Next Day, Shipping.

Free, Shipping. Pet Supplies. Fits Suzuki DT85 1979-89, DT75 1983 -89, DT50 1980 -82, DT65 1980 -90, DT115-140 1981 -89. Electronics.

Replaces Suzuki #s 48550-95500-01J, 48500-95290-OED, 48500-94620-OED, 48500-94690-OED. Product Detail Fits Johnson/Eventide, Chrysler And Suzuki Outboard.

part #: pt112nnp2 price

• $300.00

specifications ouboaen:

• for models: Force
• for makes: Omc, Chrysler
• for years: 1972
• brand: Api Marine
• mpn: Pt112n-np-2
• part type: Hp
• custom bundle: No
• country of origin: United States

offer ouboaen:

• availability: In Stock
• options: Ship-to-home
• sold: 0
• quantity: 1
• started: March 21, 2026

general ouboaen:

• Boat Parts > Outboard Engines Components > Anodes
• condition: New

seller ouboaen:

• # reviews: 32573
• city: Sedro Woolley, Washington
• rating: 100.0%

payments ouboaen:

• credit card: Diners-club
• other
• wallet: Paypal

returns ouboaen:

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

shipping ouboaen:

• cost: $0.00
• type: Fixed
• service: Economy
• class: Economy
• transit: 4-9 Days

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