fits model: Sx. make: Volvo.

( Brand: Volvo Penta ), ( Manufacturer Part Number: 3868893 ), ( Part Type: Unit ), ( Country Of Origin: Sweden )
The **Volvo Penta 3868893 SX-M 1.79 Upper Unit** is a high-performance marine propulsion solution engineered for precision, durability, and adaptability, making it an ideal choice for both professional and recreational boating applications. Part of Volvo Penta s renowned **SX-M series**, this upper unit is designed to deliver exceptional power and efficiency across a range of shaft sizes, including **1.79-inch, 1.89-inch, 1.97-inch, and 2.18-inch** configurations, ensuring compatibility with a wide variety of outboard and stern drive setups. Built with Volvo Penta s signature engineering excellence, this unit features a robust **aluminum housing** that balances strength with weight savings, reducing overall system fatigue while maintaining structural integrity under demanding conditions. The **SX-M architecture** incorporates a **direct-drive design**, eliminating the need for a separate gearcase, which simplifies installation, reduces maintenance complexity, and enhances reliability critical factors for operators who demand performance without compromise.
At the heart of the 3868893 SX-M lies a **high-efficiency, oil-cooled transmission system** with precision-machined gears and a **dual-stage clutch mechanism**, ensuring smooth power transfer and extended component life. The unit s **adjustable shaft angle** capability allows for optimal alignment with various propulsion setups, whether in stern drives, inboards, or outboard conversions, while the **integrated shaft seal** provides a secure, leak-resistant interface that minimizes maintenance downtime. For applications requiring versatility, the **1.79-inch to 2.18-inch shaft compatibility** offers flexibility in power distribution, making it suitable for everything from high-performance cruisers and fishing boats to commercial vessels and workboats. The **IPS (Inboard Performance System) and IPS 2.0** compatibility further expands its utility, enabling seamless integration with Volvo Penta s advanced propulsion systems for enhanced maneuverability and fuel efficiency.
Built to withstand the rigors of saltwater and heavy-duty use, the **3868893 SX-M** incorporates **corrosion-resistant materials** and **sealed bearings** to ensure longevity in harsh marine environments. Its **compact yet robust design** allows for easy retrofitting into existing propulsion systems, reducing installation time and costs while maintaining high performance. Whether paired with a **Volvo Penta D6, D7, or D9 diesel engine** or integrated into a **hybrid or electric propulsion setup**, this upper unit delivers **consistent torque, reduced vibration, and improved fuel economy** key advantages for operators prioritizing efficiency and performance. With Volvo Penta s reputation for innovation and reliability, the **3868893 SX-M** stands as a premium choice for those seeking a **high-performance, low-maintenance upper unit** that adapts seamlessly to diverse marine applications.
### **Pros and Cons of Buying a Volvo Penta 3868893 SX-M 1.79 Upper Unit (and Related Models: 1.89, 1.97, 2.18)**
#### **Overview**
The **Volvo Penta 3868893 SX-M** is a mid-range outboard engine known for its reliability, fuel efficiency, and performance in recreational and small commercial applications. The **1.79, 1.89, 1.97, and 2.18** models refer to different power ratings (measured in horsepower) within the same series, with the **1.79** being the base model and the **2.18** the highest in this range. Below is a detailed breakdown of its advantages and disadvantages.
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### **Pros**
1. **Proven Reliability**
- Volvo Penta has a strong reputation for durability, especially in marine applications. The **SX-M series** is designed for heavy-duty use, making it suitable for fishing boats, small workboats, and recreational vessels.
- Many owners report minimal issues if properly maintained, with common problems being minor compared to some competitors.
2. **Fuel Efficiency**
- The **SX-M engines** are known for their fuel-efficient operation, particularly in the **1.79 2.18 HP range**, which is beneficial for boats that require steady power without excessive fuel consumption.
- The **direct injection** system helps optimize fuel delivery, reducing waste.
3. **Moderate Power Output**
- The **1.79 2.18 HP range** provides enough thrust for small to medium-sized boats (typically **12 20 feet**) without being overly powerful.
- Ideal for **trawlers, fishing boats, and small commercial vessels** where consistent speed and reliability matter more than raw horsepower.
4. **Affordable Replacement Parts**
- Volvo Penta has a wide network of dealers and aftermarket support, making it easier and cheaper to find replacement parts compared to some luxury or niche brands.
- Common components like **pumps, seals, and timing belts** are readily available.
5. **Good for Light-Duty Commercial Use**
- The **SX-M series** is often used in **fishing boats, small tugs, and workboats** where reliability is critical.
- The **1.89 and 1.97 models** strike a balance between power and efficiency, making them versatile for different applications.
6. **Lower Maintenance Costs (Compared to High-Performance Engines)**
- Unlike **high-performance outboards** (e.g., Mercury Racing, Yamaha FX), the **SX-M series** does not require frequent high-cost maintenance.
- **Timing belt replacement** (if applicable) and **fuel system checks** are the primary maintenance tasks.
7. **Compatibility with Older Boats**
- Many **older Volvo Penta models** share similar mounting and wiring standards, making upgrades or replacements easier.
- The **SX-M series** is designed to integrate well with **mid-sized outboard mounts**, reducing modification costs.
8. **Decent Resale Value**
- Volvo Penta engines, especially well-maintained ones, hold their value reasonably well in the used market.
- The **SX-M series** is not as premium as **Volvo D4 or D6 models**, but it still commands a fair price compared to generic outboards.
9. **Quiet Operation**
- The **SX-M engines** are generally quieter than some competitors, which is beneficial for **fishing and leisure use** where noise reduction is desirable.
10. **Good for Beginners & Hobbyists**
- The **1.79 2.18 HP range** is manageable for **new boat owners** who want a reliable engine without the complexity of high-performance models.
- Easier to service than **diesel inboards** or **large gasoline outboards**.
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### **Cons**
1. **Limited High-Speed Performance**
- The **SX-M series is not designed for high-speed cruising or planing boats**. It excels in **cruising and steady power** but struggles to reach **planing speeds** efficiently.
- If you need **fast acceleration or high top speeds**, this engine may feel underpowered compared to **Mercury Verado or Yamaha FX** models.
2. **Outdated Technology Compared to Modern Engines**
- The **SX-M series is not the latest Volvo Penta model**. Newer engines (e.g., **Volvo D4, D6, or IPS systems**) offer **better fuel efficiency, electronics integration, and performance**.
- Some features like **electronic fuel injection (EFI) and advanced diagnostics** are missing in older models.
3. **Potential for Common Issues**
- Like many **mid-range marine engines**, the **SX-M series can develop problems over time**, including:- **Fuel pump failures** (common in older Volvo Penta models).
- **Timing belt wear** (if not replaced at recommended intervals).
- **Overheating in heavy load conditions** (requires proper cooling system maintenance).
- **Electrical gremlins** (relays, sensors, and wiring can fail over time).
- **Poorly maintained engines** may develop **carbon buildup in injectors** or **piston ring wear**, leading to reduced performance.
4. **No Direct Injection in Lower Models (Depends on Year)**
- Some **earlier SX-M models** may use **port injection** instead of **direct injection**, which can lead to **higher fuel consumption and less efficient combustion**.
- **Direct injection models** (later versions) are more fuel-efficient but may still not match **modern turbocharged diesels**.
5. **Limited Aftermarket Support for High-Performance Mods**
- If you want to **tune or modify** the engine for better performance, options are **limited compared to Mercury or Yamaha**.
- **Turbocharging or forced induction** is not standard and requires specialized work.
6. **Higher Initial Cost Than Generic Outboards**
- While **Volvo Penta is more affordable than luxury brands**, it is still **more expensive than generic outboards** (e.g., **Mercury 250 HP, Yamaha 200 HP**).
- The **used market** can offer better deals, but **brand reliability** comes at a premium.
7. **Service Complexity for Non-Mechanics**
- Some **Volvo Penta engines** require **specialized tools and knowledge** for repairs, making DIY maintenance **challenging for beginners**.
- **Electronic diagnostics** (if available) may require a **scan tool**, adding to service costs.
8. **Limited Availability of New Units**
- Volvo Penta has **phased out some older models**, meaning **new units are hard to find**.
- Buyers are mostly limited to the **used market**, which may include **high-mileage or poorly maintained examples**.
9. **Noisy in Some Configurations**
- While generally quieter than high-performance outboards, some **SX-M models** can be **loud under load**, especially if **exhaust systems are not properly insulated**.
10. **Compatibility Issues with Modern Boats**
- If you have a **modern boat with advanced electronics (e.g., Garmin, Raymarine, IPS systems)**, integrating an **older Volvo Penta engine** may require **additional wiring or adapters**.
- Some **newer Volvo Penta models** have **better compatibility with marine electronics**, which the **SX-M lacks**.
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### **Comparison with Other Volvo Penta Models**
**Feature** **Volvo Penta SX-M (1.79 2.18)** **Volvo Penta D4/D6 (Diesel)** **Volvo Penta IPS (Inboard Performance System)**
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**Power Range** 1.79 2.18 HP (gasoline) 100 300 HP (diesel) 150 500 HP (electric/hybrid)
**Best For** Small fishing boats, trawlers Workboats, commercial vessels High-performance cruisers, yachts
**Fuel Efficiency** Good for its class Excellent (diesel) Very high (electric/hybrid)
**Maintenance Cost** Moderate Higher (diesel) Low (electric)
**Performance** Steady cruising, not high-speed Strong torque, reliable Smooth, high-speed acceleration
**Modern Tech Integration** Limited Some EFI, diagnostics Advanced electronics, remote control
**Cost (Used/New)** Affordable (used) Mid-range (diesel) Expensive (new)
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### **Conclusion & Recommendation**
#### **Who Should Buy a Volvo Penta 3868893 SX-M (1.79 2.18)?**
- **Small boat owners** who need a **reliable, fuel-efficient engine** for **fishing, cruising, or light commercial work**.
- **Budget-conscious buyers** who want
With lowest fees. Compatible with: SX-M, SX-S Cobra, SX-C, SX-C1, SX-C2, and DP-SM 2.11, 2.32. Drained oil/lube. Upper unit was tested on Out drive before disassembly Ran both ways, forward, reverse and neutral, turns smoothly as it should, nothing unusual noticed.
Oil was clear brown, no water or metal shavings. Exact replacement for all SX Out drives stamped with 1.79, 1.89, 1.97, 2.18. The item is shown and as described in excellent condition. Any questions at all, we'll get back to you right away.
U-joint/yoke and shaft good. Internal gears 21:26. Ships to Canada. This Upper Unit gear case came from a Volvo Penta SX-M 1.79 ratio out drive.
Need the complete out drive or more parts.