Hinge Pin Tool 91-78310 18-9861 90200 for Mercruiser Alpha One Gen II Bravo I II III
Hinge Pin Tool 91-78310 18-9861 90200 for Mercruiser Alpha One Gen II Bravo I II III
Product Overview
Hinge pin tool 91-78310 is the replacement part that draws the bell housing pin on Mercruiser Alpha One, Gen II and Bravo sterndrives. The carbon steel puller fits Alpha One, Gen II and Bravo I, II and III drives, comes in a 150 x 180 x 30 mm box at 68 g, and it replaces 91-78310, 18-9861 and 90200.
It is used to remove and install the hinge pin when the bell housing comes off for a gimbal bearing, a bellows or a shift cable. The correct puller loads the pin on its shoulder, so the pin comes out straight instead of being hammered through.
Hinge pins are usually seized by the time a bellows job comes around. Hitting them with a drift deforms the head and the pin then has to be cut out, which turns a two hour job into a full day. This is the tool that avoids that.
Specifications
| Specification | Detail |
|---|---|
| Condition | New / New with tags |
| Type | Hinge pin removal and installation tool |
| Fits | Mercruiser Alpha One, Gen II, Bravo I, II and III sterndrives |
| Material | Carbon steel |
| Replaces | 91-78310, 18-9861, 90200 |
| Contents | Hinge pin tool |
| Net Weight | 68 g including packaging |
| Pack Size | 150 mm x 180 mm x 30 mm |
| Warranty | 3 year |
OEM Cross Reference
| Component | OEM Part Numbers |
|---|---|
| Hinge pin tool | 91-78310 |
| Hinge pin tool, Sierra cross reference | 18-9861 |
| Hinge pin tool, alternate number | 90200 |
Compatible Drives
| Drive | Application |
|---|---|
| Alpha One | Mercruiser Mercury sterndrive |
| Gen II | Mercruiser Mercury sterndrive |
| Bravo I, II and III | Mercruiser Mercury sterndrive |
| MC-1, R and MR | Mercruiser Mercury sterndrive |
What's Included
| Component | Detail | Qty |
|---|---|---|
| Hinge pin tool | Carbon steel puller as pictured | 1 |
| Hinge pin | Not included, this is the tool only | 0 |
| Bell housing and gimbal bearing | Not included | 0 |
When You Need It
| Job | Why The Pin Has To Come Out |
|---|---|
| Gimbal bearing replacement | The bell housing has to swing clear |
| Bellows replacement | The housing has to come off the gimbal ring |
| Shift cable replacement | The cable runs through the bell housing |
| Water hose replacement | Access is through the bell housing |
| Corroded or seized hinge pin | The pin has to be drawn out, not hammered |
Using The Tool
| Step | Action |
|---|---|
| 1 | Support the outdrive and take the weight off the hinge pins |
| 2 | Clean the thread and the pin head, and soak a seized pin in penetrating oil |
| 3 | Thread the puller onto the pin as far as it will go |
| 4 | Draw the pin out steadily, keeping the puller square to the housing |
| 5 | Clean the bore and check it for corrosion before refitting |
| 6 | Grease the new pin before it goes back in |
| 7 | Fit the pin by drawing it in with the tool rather than driving it |
| 8 | Check the housing swings freely and recheck the alignment |
Condition & Warranty
| Item | Detail |
|---|---|
| Condition | New / New with tags |
| Warranty | 3 year |
| Packaging | Sealed retail packaging |
Before You Buy
- Fits Mercruiser Alpha One and Gen II
- Fits Mercruiser Bravo I, II and III
- Also listed for MC-1, R and MR drives
- Replaces 91-78310, 18-9861 and 90200
- Carbon steel puller, made for removing and refitting the hinge pin
- Hinge pin itself is not included
- Check the drive model before ordering
- 30-Day Easy Returns
- Ships from our warehouse with tracking
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Before You Buy
Frequently Asked Questions
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We offer a 14-day hassle-free return on all products. Items must be unused and in original packaging. Every XRmarine part is also covered by our 1-year warranty against manufacturing defects. If something is not right, email us at info@xrmarineparts.com — replacement or full refund, your choice.
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