SKU: 17499576832

Transom Seal Repair Kit – Fits MerCruiser Bravo I, II, III & Blackhawk Sterndrives (Replaces 30-803100T1, 8M0095485)

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Description

Transom Seal Repair Kit – Fits MerCruiser Bravo I, II, III & Blackhawk Sterndrives (Replaces 30-803100T1, 8M0095485)Transom Seal Repair Kit Fits MerCruiser Bravo I, II, III & Blackhawk Sterndrives This is a complete transom seal repair kit for MerCruiser Bravo I, II, and III stern drives from 1998 and newer (serial number 0B664190 and up). It also fits Blackhawk stern drives from 19941995 (serial number 0D469859 and up). This kit serves as a direct replacement for multiple OEM and aftermarket part numbers, providing all the necessary components for a comprehensive

Transom Seal Repair Kit – Fits MerCruiser Bravo I, II, III & Blackhawk Sterndrives

This is a complete transom seal repair kit for MerCruiser Bravo I, II, and III stern drives from 1998 and newer (serial number 0B664190 and up). It also fits Blackhawk stern drives from 1994–1995 (serial number 0D469859 and up).

This kit serves as a direct replacement for multiple OEM and aftermarket part numbers, providing all the necessary components for a comprehensive transom service. It is designed to meet or exceed original equipment specifications for sealing and durability.

  • Includes U-joint, exhaust, and shift cable bellows, plus gimbal bearing and necessary seals.
  • Features CR Neoprene bellows with stainless steel (SS304) clips for corrosion resistance.
  • Restores the integrity of the transom assembly, preventing water intrusion.

Part Number Cross-Reference

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

Brand Part Number
Mercury 30-803100T1
Mercury 8M0095485
Sierra 18-8212-1
Sierra 18-8219
GLM 21965

Compatible Engine Models

Confirm your engine model/year in the table below. For MerCruiser 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 Rated HP Stroke Years OEM Part No. Notes
MerCruiser Bravo I All All 1998–Present 30-803100T1/8M0095485 SN# 0B664190 & Up
MerCruiser Bravo II All All 1998–Present 30-803100T1/8M0095485 SN# 0B664190 & Up
MerCruiser Bravo III All All 1998–Present 30-803100T1/8M0095485 SN# 0B664190 & Up
MerCruiser Bravo X All All 1998–Present 30-803100T1/8M0095485 SN# 0B664190 & Up
MerCruiser Bravo XR All All 1998–Present 30-803100T1/8M0095485 SN# 0B664190 & Up
MerCruiser Bravo Four S All All 1998–Present 30-803100T1/8M0095485 SN# 0B664190 & Up
MerCruiser Blackhawk All All 1994–1995 30-803100T1/8M0095485 SN# 0D469859 & Up

Technical Specifications

Specification Value
Product Type Transom Seal Repair Kit
Installation Stern Drive Transom Assembly
Connection Stern Drive to Transom Assembly
Housing Material CR Neoprene Bellows with Stainless Steel (SS304) Clips & Clamps
Housing Color Black
Weight 2.19 kg (4.82 lbs)
Warranty Varies by brand - Sierra offers Limited Lifetime Warranty
Other Technical Attributes Exhaust bellows design for Bravo/Blackhawk stern drives

Package Contents

  • 1 x Gimbal Bearing
  • 1 x Gimbal Housing Seal (41802)
  • 1 x U-Joint Bellow (86840A3/86840A05)
  • 1 x Shift Cable Bellow (74639)
  • 1 x Bell Housing Exhaust Bellow (18654A1)
  • 1 x Exhaust Tube (78458A1)
  • 1 x Water Hose
  • 1 x Gimbal Housing Oil Seal (16755Q1)
  • 1 x Gimbal Housing Seal (41802)
  • 1 x Insert Driver (41674)
  • 1 x Lever (45518A3)
  • 1 x Guide (43433)
  • 1 x Insert (14705)
  • 1 x Shift Cable Wrapping (38473)

Installation Guide

  1. Preparation: Start by tilting the stern drive to the full "up" position and securing it. Disconnect the boat's battery.
  2. Remove Drive: Detach the stern drive assembly from the bell housing according to your service manual's instructions.
  3. Remove Old Components: Carefully remove the old U-joint, exhaust, and shift bellows. Inspect for and remove any old sealant or adhesive residue.
  4. Extract Gimbal Bearing: Use a slide hammer and bearing puller attachment to remove the old gimbal bearing from the transom assembly.
  5. Install New Bearing: Align and install the new gimbal bearing using a proper bearing driver tool. Ensure it is seated correctly and the oil hole is aligned.
  6. Install New Bellows: Install the new shift cable bellow first, followed by the U-joint and exhaust bellows. Secure all bellows with the provided clamps.
  7. Replace Seals: Replace the gimbal housing and oil seals included in the kit to ensure a watertight fit.
  8. Reassemble: Re-attach the stern drive to the bell housing, ensuring all connections are secure.
  9. Final Checks: Lower the drive and check for proper shift cable operation. Reconnect the battery and test run the engine, checking carefully for any water leaks around the transom.

Troubleshooting & FAQ

Q: How do I confirm this fits my engine?
A: This kit is designed for MerCruiser Bravo I, II, III, X, XR, and Four S models from 1998-present (serial numbers 0B664190 and up) and Blackhawk drives from 1994-1995 (serial numbers 0D469859 and up). Please verify your model and serial number range before ordering.

Q: What are the signs that my transom seal kit needs replacing?
A: Common indicators include visible cracks or dry rot on the bellows, water collecting inside the bellows, a grinding or roaring noise from the gimbal bearing (especially when turning), or stiffness in the steering and shifting mechanisms.

Q: How often should I replace my transom seals and bellows?
A: As a general maintenance guideline, bellows and seals should be inspected annually and typically replaced every 3-5 years, depending on usage (freshwater vs. saltwater) and storage conditions. The gimbal bearing should be replaced if it shows any signs of roughness or rust.

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: 17499576832

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Cheryl R💎
San Leandro, US
★★★★★ 5
Beneath the perfect surface
Format: Kindle
Yesteryear completely caught me off guard in the best possible way. What begins as a fascinating look into social media influence, curated perfection, and historical living slowly unfolds into something far deeper and far more emotional than I expected. The storytelling was incredibly well done, especially the way the author balanced the polished modern influencer world against the harsh realities of 1800s frontier life. The transitions between timelines and perspectives were seamless, and by the end, every piece fit together in a way that completely redefined the story. What made this especially compelling for me was how layered Natalie’s character felt. Her upbringing, family expectations, faith, public image, and the pressure to maintain perfection all shaped the choices she made throughout the story. Rather than feeling one-dimensional, she felt like someone slowly buckling under the weight of everything she believed she was supposed to be. The emotional impact of this book surprised me. Beneath the historical elements and social media commentary is a story about identity, appearances, family, and the toll that constant performance can take on a person and those around them. This is one of those books where the less you know going in, the better the experience will be. I expected an entertaining premise, but I ended up with a story that lingered long after I finished the final page.
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Reviewed in the United States on May 28, 2026
L
Verified Purchase
Lornwal
Draper, US
★★★★★ 3
About that twist…
Format: Kindle
SPOILER ALERT! The thing about big, improbable twists in stories is that the less time you have to think about them, the better their effect. For fans of the classic TV show The Twilight Zone, it has always been clear that the half-hour shows were far better and far more punchy and memorable than their rather sad hour-long cousins. And a book has far, far more time to contemplate a twist than a TV show. Unfortunately, despite some pointed observations by the author (narcissistic people are pretty much unlikable, cruelty and brutality give power to weak men, abused children very often cling to their abusers), the big, improbable twist in Yesteryear almost completely sinks the story. The twist is the same one that sank M. Night Shyamalan’s 2004 movie The Village, and it fares no better here. Yes, people can and do live off the grid. But avoiding every single sign of civilization for years on end? Even if you’re not in a commercial flight path, there are such things as helicopters and small private planes, especially in remote areas. Perhaps people rarely stray onto private land in the wilderness, but once in a while, stray they do. And when that wilderness home was once widely publicized? Excuse me, but people are going to look for it. This is all not to say that Yesteryear was not entertaining - it was. I read it in one sitting. The characters, as unlikable and unreliable as they are, were well drawn. A couple of the children were also quite believable, but the author’s excuse for the rest of the kids being cyphers was that their mother saw them as cyphers as well. Okay, that’s fair, but knowing them better would have enhanced the story for the reader. This is certainly a promising book. It held my attention and was very well-written. But that twist - well, it sank M. Night Shyamalan, too.
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Reviewed in the United States on April 10, 2026
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Starseed
Phoenix, US
★★★★★ 4
Good read
Format: Hardcover
This book has been getting a lot of hype, and I can understand why. First, it is a very unique storyline. Very different plot. Second, the main character, Natalie, is totally unlikable. In fact, I would honestly say I loathed her. She has no likeable qualities whatsoever. I guess that is what makes you want to keep reading, to find out what happens to this nasty woman. That said, I admit I was confused at the end. I am still not sure what exactly happened to Natalie, how the situation came about, and how 10 years went by when Natalie seemed to only be telling a few months time. Was she delusional? Did she have a mental breakdown? I wish it was more clear as to what exactly happened.
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Reviewed in the United States on April 23, 2026
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JJ
Birmingham, US
★★★★★ 5
What did i spend so much time reading??
Format: Kindle
Spoilers ahead This book makes me angry. A misogynistic fable that holds women as mothers as inherently either deeply flawed or as if some fairy tale perfect mother exists. I found the early parts of the novel quite funny. Thinking this poor woman why do people expect such crazy standards? Also social media influencers somehow we are to take for reality? It is entertaining and that's why we want to spend our time looking at it. It is a fantasy world. Yet that is somehow turned from something comical and poignant dissolving into madness where there can be a 16 year old that can take away your children for what I'm not sure. Filming them? Having nannies? And then again the next bunch for living off the grid? I get that this isn't going for realism. It ultimately became for me this poorly written satire maybe? Obviously what started as comically intriguing for me descended into one totally crazy crazy turn to the darkest of places. I recognize this was supposed to be some sort of cracked fairytale where nearly everyone is evil and/or mental but 30 years for child abuse? This is like a nightmare not a thriller. The book demonstrates a hatred for mothers. Just awful! It made me crave for a totally unrealistic thriller. I came to be entertained and left pissed off.
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Reviewed in the United States on May 13, 2026
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Verified Purchase
The Lewteran
Chelsea, US
★★★★★ 5
Excellent satire of tradition cult
Format: Kindle
I read this book in two days. I was eager to read it once I read the description in a Facebook post. I am a theologically conservative Christian frustrated with the tradition culture that has co-opted the faith. I see this in my social and social media circles quite a bit, and I was intrigued by a novel that took this movement to task. Furthermore, I truly enjoy well done satire and farce. I have had a hard time finding these works written well in the past, so I was bracing myself to be disappointed. I am thankful to say, I wasn’t. I didn’t expect the novel to go the way it did (and no, I won’t post spoilers), but I literally laughed out loud a several points. Let me compliment the author for one particular point: She doesn’t just blast the “tradwife” movement. Plenty of cultural movements and groups of people have their sins exploited. Rather than shooting a 12-gauge at religious conservatives, she takes a Tommy gun and hits a wide range of systems. I do want to warn squeamish readers about another issue: The novel can be quite graphic at times, explicitly detailing the intimacy struggles with the main couple. It borders on the pornographic side, but not for titillation. It’s meant to show the dysfunction in the supposedly happy couple. There were quite a few humorous moments, such as the protagonist enjoying the sounds of the chickens, only to grow wistful about their impending deaths so she can taste chicken broth. Or the protagonist’s evangelical mother reacting to her son-in-law’s purchase of a yoga mat.  I was a little disappointed in the resolution of the central issue, i.e., the time travel. But overall, the novel was an enjoyable read and worth your time.
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Reviewed in the United States on May 8, 2026

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