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Description
Transom Seal Repair Kit – Fits Mercury/MerCruiser Alpha One Gen 1, R, MR (1983-1990) (Replaces 30-803097T1)Transom Seal Repair Kit Fits Mercury MerCruiser Alpha One Gen 1, R, MR (1983 1990) This comprehensive transom seal repair kit provides all the necessary components to service the bellows and gimbal bearing on MerCruiser R, MR, and Alpha One Generation 1 sterndrives manufactured from 1983 to 1990. It is a direct replacement for OEM part number 30 803097T1 and equivalent aftermarket kits. This kit fits MerCruiser R, MR, Alpha One (19831990) with serial
Transom Seal Repair Kit – Fits Mercury/MerCruiser Alpha One Gen 1, R, MR (1983-1990)
This comprehensive transom seal repair kit provides all the necessary components to service the bellows and gimbal bearing on MerCruiser R, MR, and Alpha One Generation 1 sterndrives manufactured from 1983 to 1990. It is a direct replacement for OEM part number 30-803097T1 and equivalent aftermarket kits.
This kit fits MerCruiser R, MR, Alpha One (1983–1990) with serial number 6225577 & UP, and Alpha One SS (1986–1989) with serial number 0A545004 & UP.
- Includes U-joint, exhaust, and shift bellows for a complete overhaul.
- Comes with a new gimbal bearing (30-60792A4) and a full transom gasket and seal kit.
- Features marine-grade rubber components and stainless steel hose clamps for durability.
Part Number Cross-Reference
Use this table to confirm equivalent part numbers across OEM and aftermarket brands.
| Brand | Part Number |
|---|---|
| Mercury/MerCruiser | 30-803097T1 |
| Sierra | 18-8213 |
| Sierra | 18-2601 |
| GLM | 21950 |
| Mallory | 9-72902 |
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 | Years | OEM Part No. | Notes |
|---|---|---|---|---|
| MerCruiser | R Drive (Pre-Alpha One) | 1976-1983 | 30-803097T1 | |
| MerCruiser | MR Drive (Pre-Alpha One) | 1976-1983 | 30-803097T1 | |
| MerCruiser | Alpha One | 1983-1990 | 30-803097T1 | Serial Number 6225577 & UP |
| MerCruiser | Alpha One SS | 1986-1989 | 30-803097T1 | Serial Number 0A545004 & UP |
Technical Specifications
| Specification | Value |
|---|---|
| Product Type | Transom Seal/Bellows Repair Kit |
| Installation | Direct OEM replacement |
| Compatibility | R, MR, Alpha 1 (1983-90) S/N 6225577 & UP, Alpha 1 SS (1986-89) S/N OA545004 & UP |
| Housing Material | Marine-grade rubber |
| Contents | Complete bellows kit with gimbal bearing |
| Water Hose Size | Includes both 3/4" and 5/8" hoses |
| Weight | 2.45 kg (5.4 lb) |
| Warranty | 1-year against manufacturing defects (aftermarket) |
| Other Technical Attributes | Includes stainless steel hose clamps as required |
Package Contents
- 1 x U-Joint Bellows (replaces 60932A4)
- 1 x Exhaust Bellows (replaces 18654A1)
- 1 x Shift Cable Bellows (replaces 74639)
- 1 x 3/4" Water Hose (replaces 32-41725-33)
- 1 x 5/8" Water Hose (replaces 32-32461)
- 1 x Gimbal Bearing (replaces 30-60792A4)
- 1 x Set of Stainless Steel Hose Clamps
- 1 x Gasket Kit (replaces 27-94996T2), which includes: bell housing gasket, four O-rings (one 25-33504, one 25-35027, and two 25-25439).
Installation Guide
- Safety First: Disconnect the boat's battery and ensure the sterndrive is in the full down/trailer position.
- Remove Sterndrive: Detach the sterndrive assembly from the bell housing and transom assembly. Follow your service manual's specific procedure.
- Remove Old Components: Carefully cut and remove the old U-joint, exhaust, and shift cable bellows. Remove the old gimbal bearing from the bell housing.
- Clean Surfaces: Thoroughly clean all mounting surfaces on the transom and bell housing, removing any old sealant or gasket residue.
- Install Gimbal Bearing: Press the new gimbal bearing into the bell housing, ensuring it is properly aligned and seated.
- Install Bellows: Install the new shift cable bellows first, followed by the U-joint and exhaust bellows. Secure all bellows with the provided stainless steel clamps.
- Install Water Hoses: Attach the new 3/4" and 5/8" water hoses to their respective fittings.
- Install Gaskets: Place the new transom gaskets and O-rings in position before reinstalling the sterndrive.
- Reinstall Sterndrive: Re-attach the sterndrive assembly to the transom, ensuring all connections are secure and properly torqued.
- Final Checks: Reconnect the battery. Check for leaks in a controlled environment before full operation on the water.
Troubleshooting & FAQ
How do I confirm this fits my engine?
This kit is specifically for MerCruiser R, MR, and Alpha One Gen 1 sterndrives. The key is your serial number. It fits Alpha One drives from 1983-1990 with serial number 6225577 and up, and Alpha One SS drives from 1986-1989 with serial number 0A545004 and up. Please verify your serial number and model before ordering.
What are the signs that my transom seals need replacing?
Common signs of failure include visible cracks or dry rot on the rubber bellows, water entering the boat through the transom assembly, or a grinding/roaring noise from the gimbal bearing when turning the sterndrive. Regular inspection is recommended.
Is this a complete kit for the job?
Yes, this is a comprehensive kit containing the U-joint bellows, exhaust bellows, shift cable bellows, gimbal bearing, required water hoses, and a full gasket/seal kit. It includes all essential components for a standard transom service.
OEM vs. Aftermarket?
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.
How fast do you ship and how much does it cost?
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.
What is your warranty and return policy?
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:
- 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
4.6 ★★★★★
Based on 20 reviews
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Product Reviews
★★★★★ 5
⭐️ A Beautifully Written Story That Stays With You ⭐️
Format: Paperback, Format: Paperback
Theo of Golden by Allen Levi is one of those rare books that quietly settles into your heart and lingers long after the final page. The writing is intelligent, thoughtful, and beautifully crafted, with storytelling that feels both timeless and deeply human.
The characters are wonderfully developed and feel incredibly real, but Theo himself is unforgettable. I found myself learning so much from him along the way about life, people, kindness, and perspective.
Allen Levi has a gift for creating a world that feels warm, meaningful, and genuine. This was a truly lovely read, full of wisdom, heart, and beautiful prose. An easy five stars for me. 📚✨
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Reviewed in the United States on May 27, 2026
★★★★★ 5
A story of art, music and writing
Format: Kindle
Like the face of heaven. That’s how I see Theo, and I hope this will be a movie.
“Theo of Golden” is the debut novel by Allen Levi. He was writing as a personal challenge and just doing some scenes. He began writing in 2019-2020. He had been a songwriter and lawyer. He has no connection to Portugal, which is mentioned in the book quite a bit and led me to try Port wine. This book will lead me to do a lot of things.
Theo is a supremely interesting man! More on that other familiar interesting man in a later post.
The book will make you want to look at the faces of people. Use a gaze that calms and loves. Be kind and generous. Greet people. Be less fearful and exchange stories. Be attentive. Love people up close. Invest in the art of living. Be beautiful, useful and pleasurable. All which I should be doing, but will now do for Lent.
Theo listened with genuine interest, adoringly, encouraging and with gratitude.
Newborns look for their mother’s face, a particular gaze that calms, loves and welcomes them. Someone they recognize, run to greet and someone to bond with.
Levi signs the books “With thanks for the Theo in you.” He greets kids at a high school three days a week. He reads to second graders. He doesn’t mind being around people not like him.
The coffee shop setting is a real place in Columbus, Ga. It’s called Fountain City Coffee. In picking bestowals of the sketches there, Theo looked for someone lost, weary, worried or troubled that the gift would encourage or help.
I got to hear him in a Zoom. A group of women from Vermont who lost their daughters came to Georgia on a pilgrimage. He was a steward of clean rivers and water and said the river still flows after death. He went through a “walking season” in losing his daughter.
In a book about knowing a person, it is mentioned that a bench is a good way to do this. 7 p.m. was Theo’s meeting time with the strangers for bestowals and ended up being the time of the funeral. He also mentioned “Think Little” by Wendell Berry. Do so and if everyone does, it spreads.
Levi was born in 1956. His dad is 98. His mother passed and he lost his brother, whom he called a clone of Theo, at 55. His dad was a forester, explaining his interest in nature. Springtime is an end with a future, said Theo.
One character named Tony runs the Verbivore book store and has the Penny Loafers out there because they haven’t spent a penny and they majored in loafing. Theo and Tony end up having Port together and he told Theo is Viet Nam stories. The Penny Loafers were better than a room full of Senators. They lie. Tony ends up being more of a believer of Jesus at the end because he wasn’t before Theo.
James Ponder has no degrees hanging in his office. Note the “ponder” mentions throughout. He is a dispenser of advice, secret keeper and agent of calm. Secretary Mrs. Gidley was suspicious of Theo at first but comes around. Ponder was Theo’s landlord and mentioned the 18-inch railing and three flights of stairs before the 86 year old decided to live there.
Kendrick reminds me of the custodian who won “America’s Got Talent,” who has an ill daughter Lamisha, who wants to be a physical therapist or artist in the end. Her education will be paid for by Theo as were some of her medical bills. Maria Menendez is the daughter of the “little man” who killed Theo’s wife and daughter in an accident. Maria had cancer.
I don’t want to give away too much, but Theo decided to love Asher, the sketch artist, with two hearts. And there is much more to that.
Simone wears a wardrobe that honors music on stage and guests who come to listen did the same. Cello intricacies became fascinating to me and I looked up some of the music mentioned. His bow was a gift from Theo. He played Fado for Theo at his concert. It ended up being a requiem with three characters, Kendrick and Basil, the busker. Simone’s parents were there and I wasn’t clear if Theo sprang for their trip. At the end, Basil studies to get a doctorate in American literature.
Katherine is the reporter who respects Theo’s wishes while many people she interviews are praise seekers and applause junkies. He was a friend, not a headline.
Ellen rides a bike and I’ll just call her different. He gave her a foldable handsaw, cordless sander, drill and wood burner to make feather boxes. I have made one because of this book. She had $1,600 to her name from selling them, but gave the money to the cello fund after she and Simone were assaulted and the perpetrator was never caught.
Cleave is the poisonous guy—like a snake, hemlock, black widow or “words with no wisdom guy.”
All but Cleve show community in sitting on the same row or pew. They all have sparks of hope.
I loved this line: We walk all roads, long and winding. Road to ruin. Easy Street. Road less traveled.
I’m so mad that my notes from Chapter 10-28 somehow disappeared. I may reread. This post would be longer. I probably have a dozen favorite books and just added this one.
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Reviewed in the United States on February 5, 2026
★★★★★ 5
Recognizing the Hearts that Burn Within Us
Format: Paperback
Yes, Theo of Golden does, at times, border on the melodramatic and the sentimental. It can be repetitive. It can take an awfully long time to make its point. And yet, the novel speaks very significantly of the need for love, compassion, generosity and forgiveness---in a world that is not always kind, in a world where many of us carry secret burdens---where sadness (mixed with intermittent joy) might be viewed as a universal human affliction.
Theo of Golden is, overall, a book of glad tidings. An end with a future. Thoughtfully, warmly and intelligently written. A novel that often addresses the beauty of Art, most notably painting and music. A novel in which I learned what a fado is. In fact, I learned a lot from this novel.
Unlike some readers, I did not see the book as misogynistic or xenophobic. I didn't necessarily see it as "Christian fiction"---unless you mean doing good, striving for strength of spirit and understanding the connection between "the ultimate and the proximate, the wide grace and the narrow way."
Finally, I don't view the novel's conclusion as disappointing, but simply as falling action and resolution. It is, after all, a very traditionally structured work.
Kudos to the author Allen Levi for having written an initially self-published book that was later picked up by a major publishing house. That is, indeed, a rarity.
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Reviewed in the United States on May 17, 2026
★★★★★ 5
5 STARS – The Mistake is sweet, sexy, funny and has the prefect amount of feels! Elle Kennedy ROCKS!
Format: Kindle
The Mistake is the second book on the Off Campus series by Elle Kennedy. The Mistake is Logan’s book and I can honestly say that when I read The Deal, I fell head over heels for this character from the moment I met him. How can you not love John Logan and his cocky grin?
John Logan is a player a fact that he makes no excuses for. He is a very well-known member of the Briar University hockey team and because of this; he has no problems getting the female students attention. In fact he has no issues getting any females attention, at all. But lately Logan has realized that he has been hooking up even more frequently than usual, even by his own standards. In fact his friends are noticing it as well, but what they do not know, is that he has a reason for his behavior. He is just not willing to admit it or even consider dealing with it because he is far more comfortable with running away from the problem, then facing it head on.
“This obsession with Hannah Wells is really starting to mess with my head. I need to get laid. ASAP.”
Grace Ivers is a freshman at Briar University and she is well aware of who John Logan is. Her best friend has been chasing Dean, one of Logan’s teammates for quite some time now with no success. When she bumps into Logan at a party on campus one night, immediately following one of his many hook ups she is struck by his hotness and cocky attitude, but quickly pulls herself out of the lustful fog. John Logan is a player and there is no way he would ever be interested in her, the freshman virgin. Grace also has no interest in being yet another notch on Logan’s seemingly never ending belt loop.
When Logan randomly knocks on Grace’s dorm room door one evening looking for a party, she is shocked. What could he possibly want with her? It has to be a mistake… and it is, he has the wrong room but, what happens next as they say is history. Grace and Logan are attracted to one and other and the sexual tension is thick enough to cut with a knife. Lust prevails and they do hook up that night, but Logan gets freaked out and leaves Grace “hanging” immediately afterwards. She is confused and hurt. Logan is totally clueless; he does this all the time, hooks up and runs, but then it hits him, Grace deserves better than that. Grace is better than that.
“I made the guy come last night and he didn’t even stick around long enough to kiss me goodbye. So yeah, I have to face the facts: I’m just another girl on a long list of John Logan’s conquests.”
“Leaving a girl wanting isn’t just embarrassing. It’s unacceptable.”
Grace is not a puck bunny, in fact she doesn’t even like hockey, she prefers football. Logan doesn’t do relationships; he has no time, between Hockey and dealing with his troubled family life. When Logan is finally realizes he has feelings for Grace he doesn’t handle it well at all. He wants what Garrett has with Hannah. He is lonely and the never ending line of hook ups no longer interests him, he’s thinking constantly of Grace, other women no longer interest him at all. But he has screwed up royally; can he ever win Grace back?
“It's a damn shame that duels don't play a role in the modern world anymore.”
The Deal was the first book I had ever read by this author and I loved it, I couldn’t wait to get my hands on The Mistake. It then got buried on my kindle and I just realized I hadn’t yet gotten to read it and I moved up the list. I’m so very glad that I did, I love Elle Kennedy’s style of writing and being a Canadian I have a real soft spot for handsome, cocky, hockey players. I love that this book was a fabulous balance of sexy and steamy, sweet and sassy, funny and emotional. I love the characters, every single one of them. I especially love that the female main characters are spunky and sassy. The story line was great and I thought that the banter between characters was very amusing. I love that each book has a happily ever after and I’m really excited now to begin reading The Score. I hope that each and every one of the crew is given their own story in this series before it ends, because now I’m addicted. I’m reading The Score next; I’m excited to read Ali and Dean’s story. If you have not yet begun to read this series, I highly recommend it; I am loving this series by this fabulous Canadian author.
“This guy continues to surprise me. To awe me. He’s a better person than I am, better than he gives himself credit for, and if I wasn’t sure about it before, then I’m damn well sure of it now. I love him.”
“I need you. I can’t stand the thought of being without you.” He releases a shaky breath. “You’re the last person I think about before I go to sleep, and the first person I think about when I open my eyes in the morning. You’re it for me, baby.”
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Reviewed in the United States on January 25, 2016
★★★★★ 4
book 2
Format: Kindle
This was a great read. I loved both main characters!!
It has spice, sass, the sweetest FMC, rich family backstories, and a HEA!
Hockey, romance, and hotness. What else could you ask for?! Give it a go!!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 24, 2026
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