SKU: 55193174848

Hinge Pin Tool – Fits Mercury/MerCruiser Sterndrive Alpha 1 Gen 1 & 2, Bravo I II III (Replaces 91-78310)

$24.29 $26.99
Save 10%
No.2 Bestseller on sm10m.ch >

Pay in installments of $6.75 with ShopPay, AfterPay and Klarna

Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Aug 24 - Aug 29

Promo Codes Available:

For Your Every Summer RSVP, with Code: SUMMER15

Description

Hinge Pin Tool – Fits Mercury/MerCruiser Sterndrive Alpha 1 Gen 1 & 2, Bravo I II III (Replaces 91-78310)Hinge Pin Tool Fits Mercury MerCruiser Sterndrive Alpha 1 Gen 1 & 2, Bravo I II III This is a specialized service tool designed to remove and install hinge pins in Mercury MerCruiser sterndrive units. It is compatible with a wide range of drives, including Alpha One (Gen 1 and Gen 2) and all Bravo series (I, II, and III). This tool is a direct replacement for Mercury MerCruiser part 91 78310 and other aftermarket equivalents. Material: Constructed

Hinge Pin Tool – Fits Mercury/MerCruiser Sterndrive Alpha 1 Gen 1 & 2, Bravo I II III

This is a specialized service tool designed to remove and install hinge pins in Mercury MerCruiser sterndrive units. It is compatible with a wide range of drives, including Alpha One (Gen 1 and Gen 2) and all Bravo series (I, II, and III).

This tool is a direct replacement for Mercury/MerCruiser part 91-78310 and other aftermarket equivalents.

  • Material: Constructed from high-strength machined steel for durability.
  • Installation: Designed for manual use with a standard socket wrench.
  • Function: Used to remove and install hinge pins from the bell housing.

Part Number Cross-Reference

Use this table to confirm equivalent part numbers across OEM and aftermarket brands.

Brand Part Number
Mercury/MerCruiser 91-78310 / 9178310
Sierra 18-9861
GLM 90200
Mallory 9-79805

Compatible Engine Models

Confirm your engine model/year in the table below. For Mercury owners, here’s a guide to help you identify your engine’s serial/model: Mercury Serial Number Guide. You can also review exploded diagrams to verify part numbers: Mercury Parts Diagrams & Catalog.

Brand Model Application Years OEM Part No. Notes
MerCruiser Alpha One Gen 1 Sterndrive All 91-78310 Used to remove/install hinge pins
MerCruiser Alpha One Gen 2 Sterndrive All 91-78310 Used to remove/install hinge pins
MerCruiser Bravo I Sterndrive All 91-78310 Used to remove/install hinge pins
MerCruiser Bravo II Sterndrive All 91-78310 Used to remove/install hinge pins
MerCruiser Bravo III Sterndrive All 91-78310 Used to remove/install hinge pins
MerCruiser Bravo X Sterndrive All 91-78310 Used to remove/install hinge pins
MerCruiser Bravo XR Sterndrive All 91-78310 Used to remove/install hinge pins
MerCruiser Bravo XZ Sterndrive All 91-78310 Used to remove/install hinge pins
MerCruiser MC-1 Sterndrive All 91-78310 Used to remove/install hinge pins
MerCruiser MR Sterndrive All 91-78310 Used to remove/install hinge pins

Technical Specifications

Specification Value
Product Type Service Tool (Hinge Pin Tool)
Installation Manual
Material Machined Steel
Color Silver
Thread Size Matches MerCruiser sterndrive hinge pin threading
Warranty 1 Year
Other Technical Attributes 12-point design for use with standard socket wrench

Package Contents

  • 1 x Hinge Pin Tool (Replaces 91-78310)

Installation Guide

  1. Secure the sterndrive in a stable position, trimming it to provide clear access to the hinge pins.
  2. Align the Hinge Pin Tool with the head of the hinge pin you intend to remove.
  3. Attach a standard socket wrench to the 12-point head of the tool.
  4. Apply firm, steady pressure counter-clockwise to loosen and unthread the hinge pin from the gimbal housing.
  5. Once the old pin is removed, clean the threads and prepare the new hinge pin for installation.
  6. Position the new hinge pin and use the tool to thread it into place, turning clockwise.
  7. Tighten the hinge pin to the manufacturer's specified torque to ensure a secure fit.

Troubleshooting & FAQ

Q: How do I confirm this tool will fit my sterndrive?
A: This tool is compatible with all Mercury MerCruiser Alpha One (Gen 1 and 2), Bravo (I, II, III, X, XR, XZ), MC-1, and MR sterndrive units. It is specifically designed as a direct replacement for OEM part number 91-78310 and related aftermarket parts.

Q: What makes this tool different from a standard socket?
A: This is a purpose-built tool machined to fit the unique shape of the sterndrive hinge pins perfectly. Using a standard socket or incorrect tool can strip the pin head, making removal extremely difficult.

Q: Do I need any other special tools for the job?
A: While this tool addresses the hinge pin itself, you will need a standard socket wrench to operate it. We also recommend having a torque wrench to ensure the new pin is tightened to the correct OEM specification.

Q: OEM vs. Aftermarket?
A: This listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.

Q: How fast do you ship and how much does it cost?
A: We offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.

Q: What is your warranty and return policy?
A: This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused & in original condition); please see our policy page or reach out for instructions.

Important Notes

  • Verify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.
  • This product is an aftermarket replacement part and is not an OEM component.
  • Professional installation is recommended to ensure safety and optimal performance.

Why Choose JLM MARINE?

  • Quality Assured: As a trusted manufacturer for over 20 years, we supply top marine brands globally.
  • Fast Global Shipping: Free delivery worldwide in 5–15 days.
  • Direct from Manufacturer: Competitive pricing without compromising quality.
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 55193174848

Discover Niche Categories That Outsell

Top-Converting Item to Boost Your Average Order

4.9 ★★★★★
Based on 9 reviews
Sort
Highest Rating
Newest First
Oldest First
Product Reviews
B
Verified Purchase
bill a.
Houston, US
★★★★★ 5
Awesome
Color: Orange
Awesome Toy . My Jack is crazy over it. She usually get bored with others, but this toy still has her attention after a couple of weeks Runs a long time on a short charge. 👍🏻
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 30, 2026
C
Verified Purchase
Chad
Pawtucket, US
★★★★★ 2
Not the Fetch-Fest I Hoped For
Color: Orange
I had high hopes for the PetDroid Interactive Dog Ball, especially with the newly upgraded features and promises of durable, motion-activated fun. Unfortunately, it didn’t quite live up to expectations for my furry friend. Here’s why I’m giving it 2 stars. Promising Features, Lackluster Results The idea behind this toy is fantastic: a durable, motion-activated ball that would entertain my dog without much effort on my part. The ball is supposed to roll around on its own, keeping my dog engaged and active. However, in practice, it just didn’t capture my dog’s interest. Durability I will give credit where it’s due: the ball is well-made and seems durable. It can withstand some rough handling, which is great for more aggressive chewers. Unfortunately, durability doesn’t mean much if your dog won’t play with it in the first place. Motion Activation The motion activation feature is hit or miss. While the ball does move around as advertised, it didn’t seem to move in a way that intrigued my dog. He gave it a sniff, watched it for a minute, and then walked away, unimpressed. I tried multiple times to get him interested, but he simply wasn’t having it. Lack of Engagement The biggest issue is that the ball just didn’t engage my dog at all. It might be more suitable for a different personality type or breed, but for my pooch, it was a total flop. He’s usually quite playful and curious, so I was surprised by his lack of interest. Final Thoughts Overall, the PetDroid Interactive Dog Ball might work for some dogs, but it was a miss for mine. If your dog is easily entertained by automated toys, it might be worth a try. However, based on my experience, I can’t wholeheartedly recommend it. Pros: Durable construction Motion-activated as advertised Cons: Did not engage my dog Motion activation wasn’t intriguing enough Might be more suitable for specific dog types or personalities If you decide to give it a shot, just be prepared for the possibility that your dog might not find it as entertaining as you hope. For us, it’s back to the drawing board for a more engaging toy.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 14, 2024
S
Verified Purchase
Sally
Belleville, US
★★★★★ 4
Pup Loves It, Some Other Notes
Color: Orange
We've had this for about six months and my 75 lb, 14-month-old German Shepherd pup LOVES IT. Her favorite is "Crazy Bouncing Mode." In fact, she doesn't care much for the normal mode. She chews it a lot - even drops it in her water bowl at times - and it's still going strong. This is a great purchase. It's nice hands-off entertainment. Do know that it is heavy compared to a normal ball - if your pup likes dropping it on the ground like mine does, it will land with a hard "thud," even with the included sleeve. Hopefully you don't have downstairs neighbors. Also know that the cover that goes over the charging port is removable and your dog may choke on it if they chew it in just the right manner. Definitely only let the pup play with it while supervised. All in all, great toy.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 11, 2026
J
Verified Purchase
jewelrycook
Belleville, US
★★★★★ 5
Bouncy, not hard, and good value.
Style: Fetch Balls (Pack of 10), Size: 2.5 inch
Great balls for the ball launcher and not rockhard like some of the solid rubber balls. These have great bounce, and because of the two holes, they make a fun whistling noise as they fly through the air. My dogs love them and they are a good value. By the way, if you throw them too hard, they will go through chain-link and no climb fence because they squish a bit!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 16, 2026
I
Verified Purchase
IT Secure Force
Lowell, US
★★★★★ 5
Excellent dog balls — safe design and very durable
Style: Fetch Balls (Pack of 3), Size: 2.5 inch
These fetch balls from Amazon Basics are fantastic, and my dog absolutely loves them. One of the biggest reasons I prefer these over other brands is the hole that runs through the center of the ball. This is a very important safety feature: if a dog were to accidentally get the ball stuck in the back of the throat, the hole allows air to pass through. That small detail could literally make a life-saving difference. Aside from the safety benefit, they bounce well, are easy to clean, and hold up to a lot of playtime. They’re firm but not rock-hard, and my dog goes crazy for them. Great value, great quality, and a thoughtful design. Highly recommended for dog owners who want a safer alternative to standard solid rubber balls.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 1, 2025

recommand products

XF OFFROAD XF-234 Gloss Black Milled 22x10 -18 8x165.1/8x170 125.2
187.50
XF OFFROAD XF-237 Gloss Black Milled 20x10 -12 5x127/5x139.7 78.1
178.50
Star Wars AT-AT 75075
29.99
XF OFFROAD XF-236 Gloss Black Milled 20x9 +12 5x127/5x139.7 78.1
165.00
Ford Bronco 2021-Present 6th Gen. - Double Drawer Module - 22 3/16" Wide x 25" Depth
937.50