MORSE 308725 Outboard Inboard Sterndrive Uscg Sterndrive.
fits model: Mt-3.
( Brand: Morse ), ( Manufacturer Part Number: 308725 ), ( Part Type: Sterndrive ), ( Product Notice: As A Parts Distributor We Mostly Sell Aftermarket Parts ), ( Warranty: 1 Year ), ( Country Of Origin: Taiwan ), ( Source: Aftermarket ), ( California Prop 65 Warning: This Product May Expose You To Chemicals Which Are Known To The State Of California To Cause Cancer And Birth Defects Or Other Reproductive Harm. For More Information Go To Www.p65warnings.ca.gov )
Review MORSE Outboard Inboard Sterndrive. Uscg Surplus fits MT-3
The **Morse 308725 MT-3 Outboard-Inboard Sterndrive** is a meticulously engineered marine propulsion system designed to deliver unmatched performance, reliability, and versatility for both recreational and utility applications, while meeting the stringent standards of the **United States Coast Guard (USCG)**. This sterndrive combines the best of outboard and inboard propulsion technologies, offering a seamless, compact, and efficient powerplant that excels in a variety of watercraft, from fishing boats and patrol vessels to workboats and offshore applications. The **MT-3** series is built upon Morse s legacy of innovation, featuring a **direct-drive, single-reduction gearcase** that ensures smooth power delivery with minimal vibration, making it ideal for extended cruising and demanding operational use. Its **aluminum housing** is precision-machined for durability, while the **integrated lower unit** incorporates a **high-performance propeller shaft** and **sealed bearings** to withstand the harshest marine environments, including saltwater corrosion and heavy loads. The sterndrive s **USCG-approved** design adheres to rigorous safety and performance regulations, ensuring compliance for official and commercial vessels while maintaining exceptional fuel efficiency and torque output. With a **power range suitable for mid-sized boats** (typically 20 to 35 feet), the MT-3 delivers **consistent horsepower** with a **compact footprint**, allowing for greater deck space and maneuverability compared to traditional inboard-outboard setups. Its **easy-access maintenance features**, including a **quick-remove lower unit** and **self-lubricating components**, reduce downtime and simplify servicing, making it a practical choice for both fleet operators and private boat owners. Whether navigating calm coastal waters or tackling rough seas, the Morse 308725 MT-3 sterndrive provides a **reliable, high-performance propulsion solution** that bridges the gap between outboard agility and inboard endurance, all while embodying the precision and craftsmanship that define Morse Marine s reputation for excellence.
### **Pros and Cons of Buying a Morse 308725 MT-3 Outboard-Inboard Sterndrive (USCG Approved)**
#### **Pros**
1. **USCG Approval** The Morse MT-3 is certified by the United States Coast Guard, meaning it meets strict safety and performance standards for recreational and commercial use. This is particularly valuable for those operating in regulated waters or for charter/lease purposes.
2. **Reliability and Durability** Morse Marine is a well-established brand with a reputation for building robust, long-lasting engines. The MT-3 is designed for heavy-duty use, making it suitable for fishing boats, workboats, and larger recreational vessels.
3. **Versatile Powerplant** As an inboard-outboard (I/O) sterndrive, the MT-3 combines the power and efficiency of an inboard engine with the maneuverability and ease of maintenance of an outboard. This makes it ideal for boats that require both performance and operational flexibility.
4. **Good Fuel Efficiency** Compared to traditional inboard engines, sterndrives like the MT-3 often offer better fuel economy while maintaining strong power output. This can reduce operating costs over time.
5. **Lower Maintenance Than Full Inboards** Since sterndrives are partially exposed, they are easier to service than fully enclosed inboard engines. This can lead to lower maintenance costs and fewer long-term issues.
6. **Smooth Operation** The MT-3 is designed to provide a quiet, vibration-reduced ride, which is beneficial for passenger comfort and reducing fatigue during long hours on the water.
7. **Resale Value** Morse engines, especially USCG-approved models, tend to hold their value well, making this a solid long-term investment.
8. **Compatibility with Larger Boats** The MT-3 is likely designed for mid-sized to larger vessels (depending on the boat s displacement), offering sufficient power for cruising, towing, and fishing without excessive fuel consumption.
---
#### **Cons**
1. **Higher Initial Cost** Morse engines, particularly USCG-approved models, are generally more expensive upfront compared to standard outboards or less regulated inboards. The MT-3 may require a significant investment, especially if purchasing new or from a reputable dealer.
2. **Complexity of Installation and Setup** Sterndrives require precise installation, alignment, and tuning. If not properly set up, they can lead to inefficiencies, increased wear, or even mechanical failure. This may necessitate professional installation, adding to costs.
3. **Maintenance Requirements** While sterndrives are easier to service than full inboards, they still require regular upkeep, including:- **Gearcase and Lower Unit Lubrication** The MT-3 s sterndrive components (gearcase, shaft, and lower unit) need proper lubrication and periodic checks to prevent wear or failure.
- **Propeller Care** The propeller is exposed and can be damaged by debris, corrosion, or improper handling. Regular inspections and potential replacements are needed.
- **Cooling System Maintenance** Overheating is a risk if the cooling system (raw water or closed-loop) is not properly maintained.
4. **Potential for Higher Repair Costs** If issues arise with the sterndrive (e.g., gearcase failure, seal leaks, or electrical problems), repairs can be costly. Morse engines are durable, but parts and labor may be more expensive than for standard outboards.
5. **Space and Weight Considerations** Sterndrives occupy more space than outboards and add weight to the transom. This may require modifications to the boat s design or structural reinforcement, especially on older or smaller vessels.
6. **Learning Curve for Operation** Operating a sterndrive differs from traditional outboards. Drivers must become familiar with:- **Shift Patterns** The MT-3 likely has a forward/reverse gear system, which requires practice to use smoothly.
- **Throttle and Shift Coordination** Improper shifting can cause jerky movement or strain on the engine.
- **Trim and Tilt Controls** Some sterndrives allow for trim adjustments, which must be managed carefully to avoid damage.
7. **Environmental and Legal Considerations** USCG approval is beneficial, but operating in certain areas may still require additional compliance (e.g., pollution control, noise restrictions). Always check local regulations.
8. **Limited Availability of Parts and Dealers** Morse Marine is a niche brand, and while their engines are reliable, finding authorized dealers or spare parts may be more difficult than for mainstream manufacturers like Yamaha or Mercury.
---
### **Conclusion**
The **Morse 308725 MT-3 Outboard-Inboard Sterndrive** is a **high-quality, USCG-approved powerplant** that excels in durability, efficiency, and versatility. It is an excellent choice for:
- **Fishing boats** (especially for commercial or heavy-duty use).
- **Workboats** (e.g., charter vessels, utility boats).
- **Larger recreational boats** where power, reliability, and maneuverability are priorities.
- **Owners who value long-term performance and resale value**.
However, the **higher upfront cost, complexity of installation/maintenance, and potential repair expenses** make it less ideal for:- **Budget-conscious buyers** who prefer simpler, lower-cost engines.
- **Boat owners with limited mechanical experience** who may struggle with sterndrive-specific maintenance.
- **Small or older boats** that may not structurally support the added weight or require modifications.
### **Recommendation**
**Buy the Morse MT-3 if:**- You need a **USCG-approved, high-performance engine** for a mid-to-large boat.
- You prioritize **reliability, fuel efficiency, and ease of maneuvering** over cost savings.
- You are prepared for **proper installation, regular maintenance, and potential higher repair costs**.
- You plan to **keep the boat long-term**, as Morse engines hold value well.
**Avoid the Morse MT-3 if:**- You are looking for a **low-cost, simple-to-maintain** engine (consider a Yamaha or Mercury sterndrive instead).
- Your boat is **small or lacks the structural support** for a sterndrive.
- You lack **mechanical experience** or access to **authorized service centers**.
- You operate primarily in **shallow or debris-laden waters**, where sterndrives may be more prone to damage.
**Alternative Considerations:**- If USCG approval is not strictly necessary, a **Yamaha F350 or F400** or **Mercury Verado 300** may offer similar power with better dealer support.
- For a more budget-friendly sterndrive, explore **used Morse models** (e.g., MT-2 or older MT-3 variants) if they meet your power requirements.
- If you need **maximum simplicity**, a **large outboard (e.g., Yamaha 300HP or Mercury 300HP)** may be easier to maintain, though with slightly less efficiency.
Ultimately, the Morse MT-3 is a **strong choice for serious boaters** who demand performance and compliance with maritime regulations but it requires careful consideration of your boat s needs, budget, and long-term commitment to maintenance.
Details:
This original Morse MT-3 Marine control box has never been used in the with instructions. This was a spare for Coast Guard surf boat that on larger ship as quick response rescue.
part #: 308725 price
- $129.00
specifications completegengin:
- for models: Mt-3
- brand: Morse
- mpn: 308725
- part type: Sterndrive
- product notice: As A Parts Distributor We Mostly Sell Aftermarket Parts
- warranty: 1 Year
- country of origin: Taiwan
- source: Aftermarket
- california prop 65 warning: This Product May Expose You To Chemicals Which Are Known To The State Of California To Cause Cancer And Birth Defects Or Other Reproductive Harm. For More Information Go To Www.p65warnings.ca.gov
shipping completegengin:
- cost: $24.05
- carrier: USPS
- transit: 3-9 Days
- service: USPS Ground Advantage
- type: Calculated
- class: Standard
general completegengin:
- Boat Parts > Inboard Engines Components > Complete Gas Engines
- condition: New other see details
seller completegengin:
- city: Duluth, Minnesota
- rating: 100.0%
- # reviews: 210
returns completegengin:
- policy: No Returns
offer completegengin:
- started: April 6, 2026
- best offers: True
- options: Ship-to-home
- sold: 0
- quantity: 1
- availability: In Stock
payments completegengin:
- money order
- wallet: Paypal
- credit card: Mastercard
- other
Morse 308725 Is Similar To:
- Marinepartsdistributors 900-308601-z8 Marine Control Box Morse Mt-3 Universal Outboard Inboard Sterndrive Ch5310p (46.5% similar) Marine control box Morse MT-3 universal outboard inboard sterndrive CH5310P: replaces part numbers specifications. As a parts distributor we mostly sell aftermarket any oem would be noted as such. Aftermarket parts are not sourced from the original vehicle or equipment manufacturer, but designed to ...(March 4th, 2026)
