Bellows Retainer Ring Install Driver Tool 43577 18-9870 for Mercruiser Alpha One Gen 2 Bravo Blackhawk Sterndrive — Australia Local Warehouse
Bellows Retainer Ring Install Driver Tool 43577 18-9870 for Mercruiser Alpha One Gen 2 Bravo Blackhawk Sterndrive — Australia Local Warehouse
Product Overview
Install driver part for the U-joint bellows retainer ring on MerCruiser Alpha One Gen 2, Bravo One, Bravo Two, Bravo Three and Blackhawk sterndrives. It seats the aluminium lock ring squarely into the bellows groove so the ring goes in flat and locks, instead of distorting and popping back out. Crosses to 43577, Sierra 18-9870 and Mallory 9-79821. Dispatched from our Australia local warehouse.
The ring is a light aluminium pressing and it will not take a hammer. Every drive that comes back with a bellows full of water has a story about the ring, and the usual one is a ring that went in at an angle, bent, and left a gap at the bottom of the joint where water sits.
The driver does one job: it puts even pressure around the whole circumference at once so the ring goes in true on the first attempt. Used with the drive off the boat and the bellows clean and dry, it turns a job that usually needs two pairs of hands into a single-handed one.
Specifications
| Specification | Detail |
|---|---|
| Condition | New / New with tags |
| Type | Bellows retainer ring install driver tool |
| Application | MerCruiser Alpha One Gen 2, Bravo and Blackhawk sterndrives |
| Fits | Aluminium U-joint bellows retainer ring |
| Material | Steel, plated |
| Instructions | Not included, professional fitting recommended |
| Quantity | 1 tool |
| Country of Origin | Taiwan |
OEM Cross Reference
| Brand | Part Numbers |
|---|---|
| MerCruiser | 43577 |
| Sierra | 18-9870 |
| Mallory | 9-79821 |
Compatible Engines & Drives
| Drive | Years | Application |
|---|---|---|
| Alpha One Gen 2 | 1991 onwards | U-joint bellows retainer ring |
| Bravo One | 1988 onwards | U-joint bellows retainer ring |
| Bravo Two | 1988 onwards | U-joint bellows retainer ring |
| Bravo Three | 1988 onwards | U-joint bellows retainer ring |
| Blackhawk | As listed | U-joint bellows retainer ring |
Tool Identification
| Reference | Number |
|---|---|
| MerCruiser tool number | 43577 |
| Sierra equivalent | 18-9870 |
| Mallory equivalent | 9-79821 |
| Used on | Aluminium lock ring in the bellows groove |
How to Use
| Step | Action |
|---|---|
| 1 | With the drive off, clean the bellows groove and the ring seat |
| 2 | Check the new ring for flatness before it goes anywhere near the drive |
| 3 | Fit the bellows over the gimbal housing and seat it fully |
| 4 | Place the ring on the bellows end, square to the housing |
| 5 | Set the driver over the ring so it sits flat on the full circumference |
| 6 | Press evenly until the ring clicks into the groove |
| 7 | Check the ring sits flush all the way round, no high spots |
| 8 | Grease the ring and the bellows lip before the drive goes back on |
What's Included
| Component | Qty |
|---|---|
| Bellows retainer ring install driver tool | 1 |
Condition & Warranty
| Item | Detail |
|---|---|
| Condition | New / New with tags |
| Warranty | Standard |
| Packaging | Sealed retail packaging |
Shipping from Australia
| Destination | Warehouse | Note |
|---|---|---|
| Australia | Australia local warehouse | Domestic delivery, no import duty |
| New Zealand | Australia local warehouse | Short transit, customs may apply |
| Asia Pacific | Australia local warehouse | Tracked air and sea options |
Before You Buy
- Confirm the drive is an Alpha One Gen 2, Bravo or Blackhawk
- This is the retainer ring driver, not the bellows or the ring itself
- Check the number on the old tool, 43577 and 18-9870 are the common references
- No installation instructions are included
- Buy the bellows and the ring at the same time, they are separate parts
- Grease the ring before fitting, a dry ring will bind
- 30-Day Easy Returns
- Ships from our Australia local warehouse
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