SKU: 60475441814

30-803097T1 Transom Seal Bellows Kit for MerCruiser Alpha One Gen 1 | JLM Marine

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Description

30-803097T1 Transom Seal Bellows Kit for MerCruiser Alpha One Gen 1 | JLM MarineTransom Seal Bellows Kit for MerCruiser Alpha One Gen 1 OEM 30 803097T1 This comprehensive transom seal bellows kit is engineered for MerCruiser Alpha One Generation 1 stern drives. It provides a complete solution for rebuilding and repairing your drive system, including the transom seal assembly, water pump components, power trim cylinder seals, and a tilt trim limiter sensor. This kit directly replaces OEM part numbers 30 803097T1, 46 96148A8, 25

Transom Seal Bellows Kit for MerCruiser Alpha One Gen 1 – OEM 30-803097T1

This comprehensive transom seal bellows kit is engineered for MerCruiser Alpha One Generation 1 stern drives. It provides a complete solution for rebuilding and repairing your drive system, including the transom seal assembly, water pump components, power trim cylinder seals, and a tilt/trim limiter sensor.

This kit directly replaces OEM part numbers 30-803097T1, 46-96148A8, 25-87400A2, and 805320A03, offering a cost-effective aftermarket alternative for MR/Alpha One sterndrive maintenance and overhaul projects.

  • Complete rebuild kit with transom seal, gimbal bearing, bell housing gasket, water pump repair kit, power trim seals, and tilt/trim sensor
  • Designed specifically for MerCruiser MR/Alpha One Generation 1 stern drives
  • Comprehensive package eliminates the need for multiple separate purchases

Part Number Cross-Reference

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

Brand Part Number
MerCruiser 30-803097T1
MerCruiser 46-96148A5
MerCruiser 46-96148A8
MerCruiser 60367A1
MerCruiser 25-87400A2
MerCruiser 805320A03

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
MerCruiser MR / Alpha One Gen 1

Technical Specifications

Specification Value
OEM Part Number 30-803097T1
Application MerCruiser Alpha One Gen 1 Sterndrive
Kit Type Complete Rebuild/Repair Kit

Package Contents

Please check all parts clearly before ordering! Due to the large package size, return costs are very high. Verify compatibility before purchase.

  • 1× R/MR / Alpha One Transom Seal Kit with Gimbal Bearing and Bell Housing Gasket (30-803097T1)
  • 1× MR / Alpha One Water Pump Repair Kit (46-96148A5 / 60367A1 / 96148A8)
  • 1× R/MR / Alpha One Power Trim Cylinder Seal Rebuild Kit (25-87400A2)
  • 1× Tilt/Trim Limit Limiter Sender Sensor (805320A03)

Package parts are exactly as shown in the product images.

Installation Guide

  1. Preparation: Disconnect the battery and raise the stern drive to the full up position. Clean the transom and gimbal housing thoroughly to remove old sealant and debris.
  2. Remove Old Components: Detach the stern drive from the gimbal housing and remove the old transom seal, bellows, and gimbal bearing. Inspect all mounting surfaces for damage or corrosion.
  3. Install Gimbal Bearing: Press the new gimbal bearing into the gimbal housing using a bearing installation tool. Ensure it is seated fully and squarely in the housing.
  4. Install Bell Housing Gasket: Position the new bell housing gasket on the transom assembly. Apply a thin bead of marine-grade sealant if recommended by your service manual.
  5. Install Transom Seal: Slide the new transom seal bellows onto the gimbal housing and secure with the provided clamps. Ensure the seal is not twisted and all clamps are tightened evenly.
  6. Replace Water Pump Components: Disassemble the water pump housing and replace the impeller, gaskets, seals, and wear plate from the water pump repair kit. Lubricate the new impeller with glycerin or soapy water before installation.
  7. Rebuild Power Trim Cylinders: Remove the trim cylinders and carefully disassemble them. Replace all O-rings, seals, and gaskets from the power trim rebuild kit, ensuring cleanliness to prevent contamination.
  8. Install Tilt/Trim Sensor: Remove the old tilt/trim limiter sender sensor and install the new unit. Connect the wiring harness and verify secure mounting.
  9. Reassemble Stern Drive: Carefully align and reattach the stern drive to the gimbal housing. Torque all mounting bolts to manufacturer specifications in the correct sequence.
  10. Fill and Bleed: Refill the stern drive with the appropriate gear oil and bleed the power trim system. Check for leaks around all newly installed seals and gaskets.
  11. Test Operation: Reconnect the battery and test trim/tilt functions in all directions. Run the engine in a test tank or on the water to verify proper water pump operation and check for leaks.
  12. Final Inspection: After initial operation, recheck all fasteners and clamps for tightness. Inspect all seal areas for signs of leakage and address immediately if found.

Troubleshooting & FAQ

Q: How do I confirm this kit fits my MerCruiser stern drive?
A: Verify that your stern drive is an Alpha One Generation 1 model. Check your service manual or the identification tag on your drive unit. Cross-reference the OEM part numbers (30-803097T1, 46-96148A8, etc.) with your existing components to ensure compatibility.

Q: What are the signs that my transom seal and bellows need replacement?
A: Common symptoms include water intrusion into the bilge area, visible cracks or tears in the bellows, gear oil leaking from the stern drive, or difficulty maintaining proper trim/tilt operation. Inspect bellows annually for deterioration.

Q: How often should I replace the water pump impeller and transom seals?
A: Water pump impellers should typically be replaced every 2-3 years or 200-300 hours of operation, whichever comes first. Transom seals and bellows should be inspected annually and replaced every 3-5 years or at the first sign of wear or damage.

Q: Can I install this kit myself or do I need a professional?
A: While experienced DIY mechanics with proper tools can perform this installation, it requires stern drive removal, precision alignment, and specific torque specifications. Professional installation is recommended to ensure safety and prevent costly damage from improper assembly.

Q: What's the difference between this aftermarket kit and the OEM version?
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: 60475441814

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Roman P.
Draper, US
★★★★★ 5
Colonialism not dead yet
This is a review of the 2004 Grove paperback edition of Frantz Fanon’s The Wretched of the Earth The Wretched of the Earth is the most famous work of Algerian revolutionary Franz Fanon (1925-1961) finished and published shortly before his death (he died of leukemia). Fanon is known above all as a theorist of revolutionary violence and a champion of its therapeutic good for the oppressed. However, this book is not about armed struggle only; it covers many other topics: theory of class conflict in colonies, revolutionary process and subjects of social change in the Third World, the future of new independent states (former colonies), strategies of building Third World—First World relations in a right way, the relationship between the struggle for national culture and national liberation struggles, consequences of colonialism for both the colonizer and the colonized, etc. It’s a book of an angry man; the author's revolutionary pathos and standing with the oppressed (‘the wretched of the earth’) are noticeable. Though Fanon wrote his book drawing on the experience of the Africa of the 1950s an acute reader can easily notice similarities and parallels with what’s going on in the underdeveloped countries all over the world. The book can be of particular use for anthropologists, historians, philosophers, sociologists, as well as for those interested in cultural studies. I prefer Richard Philcox’s translation to the one published in 1963. Citizens of the global South can skip Jean-Paul Sartre’s preface; let the author speak for himself.
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Reviewed in the United States on September 17, 2019
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R. Schwenk
Lake Worth, US
★★★★★ 4
Influential and Insightful
Frantz Fanon's The Wretched of the Earth is an important document in the history of imperialism capturing the state of the Algerian revolution and the struggle for independence in the Third World at a crucial time. The year was 1961, and the book was published just before Fanon's premature death. Algeria was a year away from independence. The Congo had just achieved a travesty of independence. The Cuban revolution was still fresh. Fanon was born in Martinique but was fully committed to the Algerian cause by the end of his life. His insights into the pitfalls threatening newly-independent nations have proved to be uncannily accurate. His voice is of his time and ahead of his time. I would recommend this book to those wanting to learn more about the Algerian War and to those curious about the huge effect of this book on the leftists of the 1960s.
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Reviewed in the United States on September 28, 2013
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padre viejo
Bozeman, US
★★★★★ 5
A SIXTIES CLASSIC WE HAVE MOVED ON FROM OR BACK OF/
Format: Paperback
i am 90 years old. i was a student in the 60s but i had already served in the military so i was already in my 30s. Which meant with a wife and twins i was more concerned with earning a living and finishing my doctorate than participating BUT it was a time when we swung one way as a nation and we were part of the post war swing of the world. The world had developed empires, WW1 began their downfall, ww2 pretty much finished the rest BUT it opened the door for new imperialism. On one hand colonialism melted away. The greatest empire ever, the British faded to legend and an island itself breaking up. American imperialism sprouted along with Soviet. And now China and Russia. One old model, Russia, one new model China. But the world i cyclical not progressive so China may become another imperial power. Fanon is an antidote as are other writers of the 60s so good to see new editions. Many rebels are now out of print. History is always ignored but it is always present.
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Reviewed in the United States on July 12, 2022
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Ra Shemsu Heru Drakes
San Leandro, US
★★★★★ 5
An Important Text for All Those Engaged in The Struggle
Format: Paperback
The type of text that can bring about a breakthrough in consciousness, it places world affairs in perspective for the seeker of an authentic African consciousness.
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Reviewed in the United States on May 19, 2025
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Houston
Lake Worth, US
★★★★★ 5
Brings history to life
Format: Paperback
Got this book as a read aloud before traveling to London. We did a tour of the Tower of London and used the map in this book, marking off the different parts we walked theough- talking about which parts were the setting of different scenes in the book. Reading this gave my kids a real love and personal connection to the Tower. Cliffhanger endings to different chapters. My 9 and 6 year old lived it. My 4 year old couldn't keep up.
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Reviewed in the United States on October 21, 2024

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