BFO HN8IA6 Impeller Repair Kit 40 50 47-821354A1 18-4531

( Brand: Bfo ), ( Manufacturer Part Number: HN8IA6 ), ( Part Type: Hp Impeller ), ( California Prop 65 Warning: California Prop 65 Warning ), ( Fitment: For Mariner/force 25, 30, 40, 50 Hp 1998-1999 ), ( Oe/part Number: 47-821354a1, 47-821354a2, 821354a1, 821354a2, 18-4531 )

Review BFO Impeller Repair Kit 40 50 Hp fits MARINER 1998–1999

The **BFO HN8IA6 Impeller Repair Kit** is a meticulously engineered solution designed specifically for restoring peak performance to the lower unit of **Mariner 40 and 50 HP outboards** from the **1998 1999 model years**, corresponding to the **47-821354A1** and **18-4531** part numbers. This high-quality repair kit is crafted to address common wear and tear issues affecting the impeller assembly, ensuring optimal water flow, reduced strain on the engine, and extended longevity of the propulsion system. The kit includes a **new, precision-machined impeller** crafted from durable marine-grade materials, engineered to match the original specifications for seamless integration and maximum efficiency. Complementing the impeller is a **replacement impeller shaft**, designed to eliminate binding and vibration, which are frequent culprits behind premature impeller failure and reduced fuel economy. Additionally, the kit features a **sealing gasket set**, including O-rings and impeller housing seals, to prevent leaks and maintain a tight, secure fit within the lower unit. For added durability, the kit may also include **impeller nut washers** and **locking components**, ensuring the assembly remains securely fastened under the stress of high-speed operation. This repair kit is ideal for boat owners and marine technicians seeking a **cost-effective, long-lasting solution** over costly replacements or generic aftermarket parts. By restoring the impeller to factory-like condition, this kit helps maintain the outboard s **thrust, fuel efficiency, and overall reliability**, making it a smart investment for both performance enthusiasts and those looking to preserve their vessel s mechanical integrity. Proper installation, following the manufacturer s guidelines, ensures optimal results and extends the life of the Mariner outboard s lower unit.

**Pros and Cons of buying a BF&O HN8IA6 Impeller Repair Kit for a 1998-1999 Mariner 40-50 HP Outboard (Part #47-821354A18-4531)**

1. **Direct Fit and Compatibility** The kit is specifically designed for the 1998-1999 Mariner 40-50 HP outboards, ensuring a proper match with the impeller and associated components. This reduces the risk of purchasing an incompatible part that may not function correctly or fit securely.

2. **Cost-Effective Repair** Replacing a damaged impeller rather than the entire lower unit or engine can be significantly cheaper than a full overhaul. The kit likely includes essential components like the impeller, gasket, and possibly a new shaft seal or bearing, which are common failure points in older outboards.

3. **Prevents Further Damage** A failing impeller can cause excessive vibration, reduced performance, or even catastrophic failure (e.g., seized bearings or shaft damage). Addressing the issue early with this kit can prevent more expensive repairs down the line.

4. **Ease of Installation** The kit is designed for DIY repair, meaning you can perform the work yourself without needing a marine mechanic. This saves labor costs and gives you control over the timing and quality of the repair.

5. **Improved Performance** A properly functioning impeller ensures optimal water flow, which translates to better throttle response, fuel efficiency, and overall engine performance. If the impeller was worn or damaged, replacing it can restore the outboard to near-new condition.

6. **Authentic Parts** BF&O (Boat Fuel & Oil) is a reputable brand known for producing high-quality marine parts. Using genuine or OEM-compatible parts reduces the risk of premature wear or failure compared to aftermarket alternatives of unknown quality.

7. **Warranty Coverage** Some BF&O kits may come with a limited warranty, providing peace of mind in case of manufacturing defects or early failure. Always verify warranty terms before purchasing.

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1. **Limited Availability and Lead Time** Depending on the supplier, this specific kit may not be readily available in local marine stores. Online retailers might have longer shipping times, which could delay repairs if you re in a hurry.

2. **Potential for Counterfeit Parts** Buying from untrusted sellers (especially online marketplaces) increases the risk of receiving counterfeit or substandard parts. Always purchase from authorized dealers or well-reviewed suppliers to avoid this issue.

3. **Additional Costs** While the kit itself is cost-effective, you may need to purchase other tools (e.g., torque wrench, sealant, or specialized impeller puller) if you don t already own them. The total cost could exceed expectations if you re unprepared.

4. **Skill Dependency** If you lack experience with outboard engine repairs, the installation process could be challenging. Improper handling of the impeller, seals, or bearings could lead to further damage or leaks. In such cases, hiring a mechanic might be safer despite the added cost.

5. **Compatibility with Other Models** While the kit is listed for your specific year and model, there s always a slight chance of variations in later or earlier model years. Double-checking the part numbers and consulting the owner s manual or a mechanic beforehand is advisable.

6. **Wear on Adjacent Components** If the impeller failure was due to prolonged neglect (e.g., lack of maintenance, corrosion, or improper storage), other parts like the lower unit seals, bearings, or propeller shaft may also be worn. A thorough inspection may reveal additional repairs needed, increasing the total cost.

7. **Time Investment** Removing and reinstalling the impeller requires disassembling the lower unit, which can be time-consuming. If you re not familiar with the process, research or professional guidance may be necessary, adding to the overall effort.

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The **BF&O HN8IA6 Impeller Repair Kit** is a practical and cost-effective solution for repairing a damaged impeller on your 1998-1999 Mariner 40-50 HP outboard. It offers direct compatibility, improved performance, and prevents further damage, making it a sound investment for DIYers willing to put in the effort. However, the success of the repair depends on sourcing genuine parts, having the necessary tools, and either possessing the skills or seeking guidance for installation.

If you re comfortable with basic mechanical work and have access to the right tools, this kit is highly recommended. For those less experienced, consulting a marine mechanic to oversee the repair could be wise to avoid costly mistakes.

- You re confident in your ability to perform the repair or have access to professional help.

- You ve verified the part numbers and supplier legitimacy to avoid counterfeits.

- You re prepared for potential additional costs (tools, seals, or other components).

- You lack the time, tools, or mechanical skill to complete the repair safely.

- The kit is unavailable or excessively delayed in shipping.

- Other parts of the lower unit (e.g., bearings, seals) are visibly worn, requiring a more comprehensive repair.

For long-term reliability, pair this repair with regular maintenance (e.g., flushing the cooling system, checking for corrosion, and inspecting the propeller).

Details:

Impeller Repair Kit for Mariner 40 50 HP 1998 - 1999 47-821354A1 18-4531. For Mariner/Force 1998 Up 25, 30, 40, 50 HP P/N 12045/GL12045. Material Rubber Stainless Steel Plastic.guaranteed Fitment.

For Mariner 40 hp 1998 0E288000-0E344999. OE/Part number. Always the correct part. Quick, Simple.

Fast Shipping. Type:Outboard Water Pump Impeller Repair Kit. Manufacturer. For Mariner 40 hp 1999 0E345000-0E369299.

Package included.

part #: hn8ia6 price

• $32.31

specifications ouboaen:

• for models: Mariner
• for years: 1998-1999
• brand: Bfo
• mpn: Hn8ia6
• part type: Hp Impeller
• california prop 65 warning: California Prop 65 Warning
• fitment: For Mariner/force 25, 30, 40, 50 Hp 1998-1999
• oe/part number: 47-821354a1, 47-821354a2, 821354a1, 821354a2, 18-4531

seller ouboaen:

• rating: 99.6%
• city: Elk Grove Village, Illinois
• # reviews: 1651

payments ouboaen:

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

returns ouboaen:

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

general ouboaen:

• condition: New
• Boat Parts > Outboard Engines Components > Cooling Systems

shipping ouboaen:

• service: Standard
• transit: 3-5 Days
• cost: $0.00
• type: Fixed
• class: Standard

offer ouboaen:

• availability: In Stock
• sold: 0
• options: Ship-to-home
• started: April 19, 2026
• best offers: True

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