Bell Housing Gimbal Water Hose Tool & Insert Kit – Fits MerCruiser Bravo 1, 2, 3 Drives (Replaces 91-43579, 41674T)
Bell Housing Gimbal Water Hose Tool & Insert Kit – Fits MerCruiser Bravo 1, 2, 3 Drives (Replaces 91-43579, 41674T) is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
Delivery and Shipping
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Bell Housing Gimbal Water Hose Tool & Insert Kit – Fits MerCrui...
Bell Housing Gimbal Water Hose Tool & Insert Kit – Fits MerCruiser Bravo 1, 2, 3 Drives (Replaces 91-43579, 41674T) is backordered and will ship as soon as it is back in stock.
Product Details
This Bell Housing Gimbal Water Hose Tool & Insert Kit is a specialized service tool designed for properly installing water inlet hoses on MerCruiser Bravo series sterndrives. The kit includes a tapered tool and inserts required to securely seat the conical retainers into the cooling water inlet hose, ensuring a leak-free connection on all Bravo drive models.
It serves as a direct aftermarket replacement for Mercury/MerCruiser part numbers 91-43579/8M0067547 (tool) and 41674T/41674 (inserts), as well as Sierra 18-9844.
- Essential Service Tool: Enables proper installation of conical insertion retainers, a critical step for maintaining the Bravo series cooling system.
- Broad Compatibility: Engineered for a precise fit on all MerCruiser Bravo 1, Bravo 2, and Bravo 3 drives, including X and XR variants.
- Complete Kit: Includes the main tapered insert tool and two conical inserts needed for the job.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number | Notes |
|---|---|---|
| Mercury / MerCruiser | 91-43579 | Installation Tool |
| Mercury / MerCruiser | 8M0067547 | Installation Tool (Supersedes 91-43579) |
| Mercury / MerCruiser | 41674T | Hose Insert |
| Mercury / MerCruiser | 41674 | Hose Insert (Supersedes 41674T) |
| Sierra | 18-9844 | Installation Tool |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This tool kit is designed for use across the entire MerCruiser Bravo series, including Bravo X and XR variants, for water hose installation.
| Brand | Model | Rated HP | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|
| MerCruiser | Bravo 1 | All | All models | 91-43579, 41674T | For water hose installation |
| MerCruiser | Bravo 2 | All | All models | 91-43579, 41674T | For water hose installation |
| MerCruiser | Bravo 3 | All | All models | 91-43579, 41674T | For water hose installation |
| MerCruiser | Bravo X One | All | All models | 91-43579, 41674T | For water hose installation |
| MerCruiser | Bravo X Two | All | All models | 91-43579, 41674T | For water hose installation |
| MerCruiser | Bravo X Three | All | All models | 91-43579, 41674T | For water hose installation |
| MerCruiser | Bravo XR One | All | All models | 91-43579, 41674T | For water hose installation |
| MerCruiser | Bravo XR Three | All | All models | 91-43579, 41674T | For water hose installation |
| MerCruiser | Bravo XZ One | All | Up to 0M999999 | 91-43579, 41674T | Serial number limit specified |
| MerCruiser | Bravo XR Sportmaster | All | All models | 91-43579, 41674T | For water hose installation |
Technical Specs
- Product Type
- Bellhousing Gimbal Water Hose Tool & Insert Kit
- Installation
- Service Tool
- Housing Material
- Metal/Plastic
- Compatibility
- MerCruiser Bravo 1, Bravo 2, Bravo 3 Drives
- Application
- For installing conical insertion retainers into water inlet hoses
- Warranty
- 90 Days (aftermarket versions)
- Other Technical Attributes
- Designed for proper water inlet hose installation in marine cooling systems
What’s in the Box
- 1 x Tapered Insert Tool (Replaces 91-43579, 8M0067547, Sierra 18-9844)
- 2 x Hose Inserts (Replaces 41674T, 41674)
Installation Notes
- Ensure the engine is off, cool, and the battery is disconnected for safety.
- Locate the gimbal housing water inlet hose that requires the insert.
- Place one of the new conical inserts onto the tapered end of the installation tool.
- If desired, apply a small amount of marine-safe lubricant or soapy water to the insert.
- Carefully align the tool and insert with the opening of the water hose.
- Apply firm, steady pressure to push the insert into the hose until it is fully and evenly seated.
- Remove the installation tool, leaving the insert securely in place inside the hose.
- Attach the hose to the bell housing water fitting and tighten the clamp securely.
- Reconnect the battery, start the engine, and carefully inspect for any leaks around the connection.
Troubleshooting & FAQ
Will this tool work on a MerCruiser Alpha One drive?
No, this tool and insert kit is specifically designed for the water inlet hose on MerCruiser Bravo series sterndrives (Bravo 1, 2, 3 and their variants). It is not compatible with Alpha One drives.
How do I know if the insert is seated correctly inside the hose?
The insert is properly seated when its base is flush and fits snugly within the hose opening. This creates a firm, even surface for the hose to seal against the bell housing fitting, preventing leaks.
Can I re-use the old inserts from my hose?
It is strongly recommended to always use new inserts. Over time, old inserts can become brittle, cracked, or deformed from heat and pressure, which can lead to an improper seal and potential water leaks.
Is any lubricant needed to install the inserts?
While not always necessary, applying a small amount of soap and water or a marine-grade, silicone-based lubricant can make installation easier. Avoid using petroleum-based products, as they can degrade the rubber hose material over time.
What are the signs of a failing water hose insert?
Common signs include water leaking from the gimbal housing area where the hose connects, engine overheating alarms caused by insufficient water flow, or visible cracks and deterioration on the old insert upon inspection.
How does this aftermarket tool compare to the OEM version?
Functionally, it is identical. This tool is engineered to perform the same task to the same specifications as the original equipment manufacturer's tool, allowing for proper insert installation at a more accessible price.
What’s the difference between OEM and aftermarket parts?
This listing is for an aftermarket replacement, not a part supplied by the original equipment manufacturer (OEM). It is built to meet or exceed OEM-level specifications using comparable materials. All our parts are manufactured in an ISO 9002 certified facility and are batch-inspected to ensure quality and consistency.
How fast is shipping?
We ship worldwide, with typical transit times of 5–15 days for most regions. Standard shipping is free. If available for your location, expedited shipping options and their costs will be presented at checkout.
What is the warranty and return policy?
This product is covered by a 1-year warranty against manufacturing defects under normal marine use. If you encounter an issue, please contact our support team with your order details. Returns are accepted within our standard window for items that are unused and in their original condition. Please see our full policy page or contact us for instructions.
Safety & Important Info
- Verify images/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.
- This is an aftermarket replacement, not an OEM component.
- Professional installation is recommended for safety and performance.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.
- Fast Global Fulfillment — Free standard delivery to most regions in 5–15 days.
- Manufacturer-Direct Value — Fair pricing without compromising on materials or QC.
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