MERCURY 455-850690T2 Outboard Crank Crankshaft 2.5L 200HP 455-5215

( Manufacturer Part Number: 455-850690T2 ), ( Part Type: Crank Crankshaft )

Review MERCURY Outboard 2.5l 200hp Crank Crankshaft fits 1994

The **Mercury 455-850690T2 Outboard Motor** from 1994 is a robust and reliable marine powerhouse designed for high-performance boating, offering a perfect blend of strength and efficiency for both recreational and light commercial use. This model features a **2.5-liter, four-cylinder, two-stroke engine** producing a clean **200 horsepower**, making it ideal for mid-sized boats ranging from 18 to 24 feet in length. The **455-5215 crankshaft** is a key component of this engine, engineered with precision to deliver smooth operation and exceptional durability, even under demanding conditions. Built with Mercury s signature attention to detail, this outboard is equipped with a **tilt-and-trimming system** that allows for effortless handling, whether you're cruising on calm waters or tackling slightly choppy conditions. The **direct-drive transmission** ensures efficient power transfer, while the **fuel-injected carburetion** (in later models of this series) enhances performance and reduces emissions compared to older carbureted designs. The **aluminum lower unit** is designed to withstand the rigors of saltwater corrosion, a common challenge in marine environments, while the **cast-iron cylinder liners** provide added protection against wear and tear. This outboard also incorporates a **rear-mounted exhaust system** that minimizes vibration and improves overall ride comfort. Whether you're using it for fishing, leisurely cruising, or light duty towing, the **1994 Mercury 455-850690T2** delivers a balance of power, reliability, and ease of maintenance, making it a sought-after choice for boaters looking for a dependable yet high-performance outboard. Regular upkeep, including proper oil changes, fuel system maintenance, and periodic inspections of the crankshaft and lower unit, will ensure this engine remains in peak condition for years of trouble-free operation.

### **Pros and Cons of Buying a 1994 Mercury 455-850690T2 Outboard (2.5L, 200HP, Crankshaft Issue: 455-5215)**

#### **Pros**

1. **Proven Reliability** Mercury 2.5L four-stroke outboards from the early '90s are well-regarded for durability, especially when properly maintained. Many still perform well in recreational and light fishing applications.

2. **Good Power-to-Weight Ratio** At 200HP, this engine provides solid acceleration and cruising speed for boats up to around 20-25 feet, making it suitable for mid-sized vessels.

3. **Fuel Efficiency** Compared to older two-stroke outboards, four-strokes like this one are more fuel-efficient, producing less pollution and fewer fumes.

4. **Lower Initial Cost** Used Mercury 2.5L outboards from this era are relatively affordable, especially if the engine has been well-maintained or if the crankshaft issue has been addressed.

5. **Compatibility with Older Boats** If you re running an older boat that wasn t designed for modern outboards, this engine may fit better than a newer, more powerful unit.

6. **Parts Availability** While some older Mercury parts may be harder to find than newer models, the 2.5L series still has a decent supply of common components (fuel pumps, carburetors, belts, etc.).

7. **Simpler Design** Compared to modern fuel-injected outboards, this carbureted model is easier to tune and repair for those with mechanical experience.

---

#### **Cons**

1. **Crankshaft Issue (455-5215)** The most critical concern is the cracked or damaged crankshaft, which is a major safety risk. This part is not cheap to replace (often $500 $1,000 depending on labor and location), and if the engine has been running with a bad crank, internal damage (rod bearings, pistons, etc.) may have already occurred.

2. **Age and Wear** At 30 years old, the engine has likely accumulated significant mileage. Internal components like bearings, seals, and timing may be worn, leading to oil leaks, reduced performance, or failure.

3. **Carburetion Problems** Older carbureted engines are prone to fouling, poor idling, and fuel mixture issues, especially if the float bowls or jets are dirty or worn.

4. **Emissions and Modern Regulations** Many marinas and lakes now enforce stricter emissions standards. While this engine is cleaner than a two-stroke, it may not meet current requirements in some areas, limiting where you can operate it.

5. **Fuel System Vulnerabilities** Older fuel pumps and lines can fail, leading to hard starts or no-start conditions. Ethanol-blended fuels can also degrade rubber components over time.

6. **Resale Value** Even in good condition, a 1994 Mercury 2.5L will not hold value well. If you plan to sell later, expect a low resale price.

7. **Maintenance Requirements** Regular upkeep (oil changes, belt inspections, carburetor cleaning) is essential. Neglect can lead to costly repairs.

---

### **Conclusion**

- The **crankshaft issue has been professionally inspected and repaired** (or you re prepared to replace it immediately).

- The engine has **documented maintenance records** showing it has been well-cared-for.

- You re using it for **occasional recreational boating** rather than heavy-duty or frequent use.

- You re **comfortable with basic mechanical work** or have access to a mechanic who can service it.

However, if the **crankshaft is cracked or the engine has unknown history**, the risks of **sudden failure, internal damage, or high repair costs** outweigh the benefits. In that case, it may be wiser to **invest in a newer, more reliable outboard** (even if slightly more expensive) to avoid unexpected breakdowns.

### **Recommendation**

- Buy it **only if you re prepared for maintenance** (oil changes, carburetor tuning, belt replacements).

- Set aside **$1,000 $2,000** for potential repairs (crankshaft, bearings, seals, etc.).

- Use it for **light duty** (weekend fun, not daily use).

- **Do not purchase** unless you re willing to **completely rebuild it** (which may not be cost-effective).

- Consider a **used but well-documented Mercury 4.3L or 5.0L four-stroke** (more reliable, better parts support) or a **newer 200 250HP outboard** (e.g., Yamaha, Mercury Verado, or Evinrude E-TEC) for better long-term value.

- A **pre-purchase inspection** by a marine mechanic.

- **Service records** proving oil changes, belt replacements, and carburetor adjustments.

- A **test run** to check for unusual noises, leaks, or performance issues.

Ultimately, **this engine can be a good deal if the major issues are addressed**, but it s not a "set-and-forget" purchase. If you re looking for **low maintenance and reliability**, a newer outboard may be the smarter long-term choice.

Details:

This Mercury outboard crankshaft came out of a 1994 2.5L 200hp FF engine. The crankshaft, part number 455-5125 big bearing. Mercury often used slightly older crank/piston castings even in 1994 builds. Shipping is calculated based on location.

Absolutely nothing wrong with this crankshaft. The crankshaft journals are in perfect shape. Block Casting 884 9763 C 2.5L 1994 Mercury V6.

part #: 455850690t2 prices

• $333.75-$1990.00

specifications ouboaen:

• for makes: Mercury
• for years: 1994
• mpn: 455-850690t2
• part type: Crank Crankshaft

general ouboaen:

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

returns ouboaen:

• policy: No Returns

shipping ouboaen:

• transit: 4-11 Days
• service: USPS Ground Advantage
• class: Standard
• cost: $85.75
• carrier: USPS
• type: Calculated

payments ouboaen:

• credit card: Visa
• other
• wallet: Apple-pay

seller ouboaen:

• rating: 99.9%
• city: Lenoir City, Tennessee
• # reviews: 5047

offer ouboaen:

• quantity: 1
• sold: 0
• availability: In Stock
• started: March 30, 2026
• options: Ship-to-home

Mercury 455-850690T2 Is Similar To:

• 031026 Michigan Propeller Aluminum Prop Mercruiser Mercury Outboard (23.2% similar) Pb this prop has some minor damage as seen in the pictures. Please see included pictures. Condition: used but in good condition and guaranteed to function properly. This prop will also fit v6 Honda outboards with the correct hardware. 75 x 21P Mercuries mercury outboard propeller fits various ...(April 3rd, 2018)
• 06168-zy1-307 Honda Mercury Outboard Electric Circuit Breakers (34.6% similar) Products might fit other makes and model's, please research before assuming. Thanks in advance. Have up for sale good quality tested parts that a satisfactory guarantee. These products have been used and will average wear look feel to them...(April 9th, 2018)
• 10-30110 Mercury Lot Of Oem Outboard Screws New Free Shipping (33.3% similar) Lot of 2 oem mercury screws w lock washers used on some vintage mark outboard engines. Please verify comparability before purchase...(April 15th, 2018)
• 10-34691 Mercury Mariner Bulk Lot Pieces Old Stock Outboard Force Chrysler (30.3% similar) This is a bulk lot of new parts for mercury mariner force outboard nos Nola 200 individual part numbers in factory bags with most being multi PACKS1500 total pieces packed USPS medium flat rate box flax...(February 9th, 2019)
• 10-38055 Mercury Lot Of Oem Outboard Hinge Plate Screws Quicksilver New (35.2% similar) This fee covers the initial shipping cost regardless of label free. Lot of 4 oem mercury outboard hinge plate screws - quicksilver please verify compatibility before purchase...(February 21st, 2019)
• 100-25-20 6h4-11631-01-95 9009a5 9009a13 9009 Mercury Outboard Hp Bottom Guided Rebuild Kit (25.9% similar) ...(March 14th, 2018)
• 1004211wk Mercury 4 Hp Outboard (35.3% similar) It has been garaged stored up right and covered. For sale is a lightly used mercury 4 hp outboard motor model ml. This motor has not been operated in a while. I am the original owner and purchased this outboard new for use on my sailboat. The outboard model number is 1004211WK it considered a 2-...(July 12th, 2017)
• 10238367 Mercury Outboard Cylinder Head Block Water Jacket Cover (37% similar) Used cover from a 1978 mercury 115 horsepower 6 cylinder outboard boat motor...(February 1st, 2019)
• 10319 Stiletto Stainless Prop Mercury Yamaha Outboard Propeller (29.9% similar) Condition: used but in good condition and guaranteed to function properly. Part: 10319 stiletto stainless prop x 19P v6 mercury Yamaha outboard propeller fits various mariner motor parts. Please see included pictures...(August 24th, 2018)
• 10321 Stiletto Prop Mercury Mariner Yamaha Outboard Propeller (30.3% similar) May fit more engines. Condition: used but in good condition and guaranteed to function properly. Please see included pictures. Part: 10321 stiletto prop x 21P v6 mercury mariner Yamaha outboard propeller fits various motor parts. This propeller will also fit Yamaha outboard motors with the correct ...(January 7th, 2019)
• 10402 Mercury 4022-828044a 4022-828045a Outboard (35.3% similar) It also fits some XR6 model's. Selling a 1996 mercury 200EFI lower bottom cowl with seals they are in nice shape for the year, please see pictures...(February 21st, 2018)