SKU: 18294378375

Transom Bellows Kit – Fits MerCruiser Bravo 1, 2, 3 & Blackhawk Sterndrives (Replaces 30-803100T1, 8M0095485)

$77.36 $85.95
Save 10%
No.2 Bestseller on ekmsliberia.info >

Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Jul 13 - Jul 18

Promo Codes Available:

For Your Every Summer RSVP, with Code: SUMMER15

Description

Transom Bellows Kit – Fits MerCruiser Bravo 1, 2, 3 & Blackhawk Sterndrives (Replaces 30-803100T1, 8M0095485)Transom Bellows Kit Fits MerCruiser Bravo 1, 2, 3 & Blackhawk Sterndrives This transom bellows repair kit provides a complete solution for servicing MerCruiser Bravo and Blackhawk sterndrives. It is engineered to fit MerCruiser Bravo I, II, and III models from 1988 and newer (serial number 0B664190 and up) and MerCruiser Blackhawk models from 1994 1995 (serial number 0D469859 and up). This assembly is a direct replacement for multiple OEM and

Transom Bellows Kit – Fits MerCruiser Bravo 1, 2, 3 & Blackhawk Sterndrives

This transom bellows repair kit provides a complete solution for servicing MerCruiser Bravo and Blackhawk sterndrives. It is engineered to fit MerCruiser Bravo I, II, and III models from 1988 and newer (serial number 0B664190 and up) and MerCruiser Blackhawk models from 1994-1995 (serial number 0D469859 and up).

This assembly is a direct replacement for multiple OEM and aftermarket part numbers, including Mercury/MerCruiser 30-803100T1 and 8M0095485, ensuring OEM fitment and performance. The components are made from high-grade neoprene rubber and durable metal to withstand the harsh marine environment.

  • Includes all necessary bellows, gimbal bearing, gaskets, and seals for a comprehensive overhaul.
  • Designed for direct, OEM-fit installation without modification.
  • Materials selected for longevity and resistance to saltwater, oil, and UV exposure.

Part Number Cross-Reference

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

Brand Part Number
Mercury/MerCruiser 30-803100T1
Mercury/MerCruiser 8M0095485
Sierra 18-8212
Sierra 18-8219
GLM 21961
GLM 21965
Mallory 9-72905

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 Rated HP Stroke Years OEM Part No. Notes
MerCruiser Bravo One Various 4-Stroke 1988 & Up 30-803100T1/8M0095485 Serial Range: 0B664190 & Up
MerCruiser Bravo Two Various 4-Stroke 1988 & Up 30-803100T1/8M0095485 Serial Range: 0B664190 & Up
MerCruiser Bravo Three Various 4-Stroke 1988 & Up 30-803100T1/8M0095485 Serial Range: 0B664190 & Up
MerCruiser Blackhawk Various 4-Stroke 1994-1995 30-803100T1/8M0095485 Serial Range: 0D469859 & Up

Technical Specifications

Specification Value
Product Type Transom Seal Repair Kit with Bellows
Installation Direct replacement
Connection OEM fitment
Housing Material Neoprene rubber bellows with metal components
Housing Color Black
Dimensions 349.25 × 209.55 × 158.75 mm (13.75 × 8.25 × 6.25 in) [shipping dimensions]
Weight 2.54 kg (5.60 lbs) [shipping weight]
Fitting Type OEM specified
Thread Size Various - includes 0.25 × 20 × 1.00 screws for water inlet housing
Warranty 1-year warranty against manufacturing defects
Other Technical Attributes Complete kit for overhaul of transom sealing system

Package Contents

  • 1 x U-Joint Bellow (Replaces 86840A3/86840A05)
  • 1 x Exhaust Bellow (Replaces 18654A1)
  • 1 x Shift Cable Bellow (Replaces 74639)
  • 1 x Exhaust Tube (78458A1)
  • 1 x Water Intake Hose
  • 1 x Gimbal Bearing (Replaces 30-60792A4)
  • 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)
  • 1 x Outdrive Gasket Set

Installation Guide

  1. Safety First: Disconnect the boat’s battery and ensure the sterndrive is in the full down position before starting.
  2. Remove Sterndrive: Detach the sterndrive unit from the gimbal housing by removing the main mounting nuts and hydraulic trim rams.
  3. Remove Old Components: Carefully cut away and remove the old u-joint, exhaust, and shift cable bellows. Remove the old gimbal bearing and associated seals.
  4. Clean Surfaces: Thoroughly clean all mounting surfaces on the transom assembly and gimbal housing, removing any old sealant or corrosion.
  5. Install Bearing and Seals: Press the new gimbal bearing into the gimbal housing using an appropriate driver tool. Install the new gimbal housing oil seal.
  6. Install Bellows: Install the new shift cable bellow first, followed by the exhaust and u-joint bellows. Secure all clamps tightly.
  7. Connect Hoses: Attach the new water intake hose and ensure all connections are secure.
  8. Reinstall Sterndrive: Apply a new gasket from the kit and carefully guide the sterndrive back into place. Secure it with the mounting hardware.
  9. Final Checks: Torque all fasteners to the manufacturer's specified values. Reconnect the hydraulic trim rams and battery.
  10. Test Operation: Once the boat is in the water, check for any leaks around the transom assembly. Test steering and shifting for proper operation.

Troubleshooting & FAQ

How do I confirm this kit fits my engine?
The most reliable way is to verify your sterndrive model and serial number. This kit fits MerCruiser Bravo I, II, & III models (1988+, serial 0B664190+) and Blackhawk models (1994-1995, serial 0D469859+). Cross-reference your existing part numbers with those listed in the compatibility table.

What are the signs that my transom bellows need replacing?
Common signs of failure include water leaking into the boat's bilge area, visible cracks or holes in the rubber bellows, or corrosion on the u-joints and gimbal bearing. You might also notice stiffness in your steering or difficulty shifting gears, which could indicate a problem with the shift cable bellow.

How often should I replace my sterndrive bellows?
As a preventative maintenance measure, it is recommended to inspect your bellows annually for any signs of cracking, drying, or damage. A full replacement is advised every 3-5 years, depending on usage and whether the boat is stored in or out of the water.

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:
  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: 18294378375

Discover Niche Categories That Outsell

Top-Converting Item to Boost Your Average Order

4.0 ★★★★★
Based on 1963 reviews
Sort
Highest Rating
Newest First
Oldest First
Product Reviews
A
Verified Purchase
A Happy Atheist
Grantham, US
★★★★★ 1
After five months, it's basically a brick
Color: White
We've had this robot for five months, and it isn't durable. It worked fine for a couple months. But now it works fine for maybe 20 minutes and then just starts spinning around or going back in forth in the same area wasting its battery. The endless troubleshooting does not help. Cleaning all the sensors, resetting the robot, remapping the house ... Nothing helps. It is only being used in about 1100 sq ft of total space, so it's just not that complicated. It's been trying (and failing) to vacuum our smallish living room for nearly five hours, after several resets/etc. Back when it did function, the vacuum is rather loud if you want it to actually pick up anything big enough to see. The vacuum and mop are both terrible at inner corners, and the intersection between rugs and hardwood flooring is a total miss. There's like a 12" strip along all rugs where mopping never occurs. Definitely not a machine to be used without supplemental sweeping and mopping. The machine insists on starting rugs at the corner, so it pulls up even pretty heavy rugs sometimes. It's sucks up items like socks instead of avoiding them. Also, the machine has never successfully left alone no-vacuum rugs or no-go areas, so some rooms (like with high pile rugs or Christmas tree stands) just don't work without physical barricades. Really, really makes me miss the old reliable roombas...
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 21, 2026
A
Verified Purchase
Alex Jones
Cuba, US
★★★★★ 5
This vacuum is a game changer
Color: White
Not all robotic vacuums are the same, and after testing so many of them in my life this one has outperformed the others hands down! From the suction power, to the battery life, and then the app I can't find a single thing I don't love. The robot is and to pickup small crumbs, dirt, the typical messes, but most importantly it picks up kitty litter like it's nothing. This is an instant game changer. I no longer need to clean up after a robot. It's amazing! The battery life is great! I have a 2500 sq ft house and it can handle all of it before charging. The "home base" makes this effortless where I just schedule my cleans and it takes care of the rest. The app is really nicely built. It's simple and easy to navigate but it also gives me all of the advanced options such as invisible walls and no-go zones. Overall, this is robotic vacuum is my new go-to and I look forward to using it for many years to come!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 14, 2026
K
Verified Purchase
Kallista Anne
Port Orchard, US
★★★★★ 4
$500, not $600. It isn’t worth $600
Color: White
You’re gonna need to put on some glasses and grab a drink for this one. Cons : - Has issues with “muddy mats” brand rugs and mats, along with light mats - It ate my socks - Will molest your standing fans and shoes and pet toys - Castor wheel is a hair magnet along with the “tangle less” floating brush - Mop heads get dirty after just one run of the entire house - It hates charging cables - And dryer sheets PROS: - Smarter than Shark brand vacuums - Excellent management of houses and avoiding most obstacles - It mops and vacuums well - Cleaning is very easy - Cat litter gets sucked up on the strong setting (not the super strong, though that works too) - Battery lasts for vacuuming most of the house - No navigation issues - Doesn’t mess up your furniture - IT WORKS IN THE DARK the floating brush though where the metal shaft sits inside the brush itself and the miniscule space between the spinning part and the brush itself gathers hair like a magnet and will give constant roller brush errors if not regularly cleaned. The castor wheel I swear has more hair than anything I’ve seen. Even the shark didn’t collect it this bad.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 17, 2026
R
Verified Purchase
Rahul C
Port Orchard, US
★★★★★ 5
Value for Money- Exceptional performance and features!!!!
This vacuum/mop system is wonderful! I highly recommend it. This is bi-far the best vacuum and moping system which effectively cleans my floors and carpet. I've always been on the lookout for anything that can lighten my cleaning load. it’s been a real game-changer for my household routine. The self-washing and self-charging features are a huge win. I no longer have to worry about cleaning the mop or making sure it’s charged; it takes care of itself. It moves around furniture and other obstacles smoothly, rarely bumping into anything. It easily navigates tight spaces and corners, making sure every area gets cleaned. Value for Money: Considering all its features and how well it cleans, I think it’s a fantastic investment. It’s made keeping my home clean so much easier and less time-consuming. The robot vacuum was able to map my house successfully, the battery life is a bit longer than my previous robot vacuums, the suction is also great. I saw it go over crumbs in the kitchen and it picked up without any problems, and also has a mop functionality. It has a functioning app, very easy to use. The vacuum is also very quiet. By far, this is my favorite robot vacuum and I’ve tried many as I do not like to go around the house mopping and vacuuming. 10/10 would recommend this model - worth the investment. Overall I could not be happier with this purchase, my home is the cleanest it has been since I’ve first moved in.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 12, 2025
A
Verified Purchase
Amazon user
Grantham, US
★★★★★ 5
A blessing for “unforgiving” flooring
We bought an 1800s home that was 90% hardwood, but the previous owner made the decision to tear out the hardwood in the kitchen. Unfortunately for us, the flooring we picked to replace it was what I call a very unforgiving. I didn’t realize it until it was too late, but it shows every speck of dust and every muddy paw print. With two dogs, my floors looked like they had not been cleaned in years, but it was being mopped on a daily basis. Enter the Narwal. I’ve included a photo of what the floor looks like today post-clean on a typical winter day in the north (dogs and people running in and out, tracking and mud and snow everywhere). Look at it! It has a shine! In an hour, it will be dull again from the dogs’ next foray into the snowy yard, but right now…glorious! But the best thing is, I no longer care about the dogs tracking up the floor. I can just run the Narwal again. No real extra labor on my part (other than occasionally needing to fill the water container). I want to add a couple of points that I find interesting or that I think people might want to know to make their decision. Both the roller and the side sweeper brushes are meant to prevent hair from getting wound around them. So far I have found this to be true. You can see the videos the manufacturer has provided that show how this works, so I won’t bother to explain it, just point out that I’ve found it does work. I haven’t had to cut any hair out of the roller since I’ve gotten it, and that was previously a weekly thing. It does not self empty after vacuuming. However, it compresses the hair and dirt to take up less space. So while I was emptying my big self-emptying canister (on my Shark) about once a month before, I’ve only actually emptied this smaller dust bin once every one to two weeks. Initially, I was worried that this meant it wasn’t picking up as much debris and hair, but upon review, I discovered the compression factor they describe. You also have the option of using dust collection bags that you can take out and dispose of. To be more environmentally friendly, I have not chosen that option, but for people that may have issues with dust, I’m glad it is an option. It self-cleans and dries the mop pads quite well. I did pick up replacements so that I could wash them, but I’ve needed to wash them with far less frequency than I expected. When I do pull them off to wash, I don’t notice any odor like I was expecting. The mop water is used to both clean the floor and wash the mop pads. I think the majority of the water usage is to clean the pads, however. So you will need to refill that every 2 to 3 mops probably depending on how big your house is. You can use it with or without Narwal cleaner - do not use other cleaners, or you risk the device dying or messing up your floors due to over foaming. My one tip is to use any leftover mop cleaner you may have from your regular mopping, and add a capful into the dirty water bin after you empty and rinse it each time. Because if you do not empty that out every day, the stagnant water WILL be stinky. A little scented floor cleaner has seemed to improve that dramatically for me. Is it expensive? Yes. Is it worth it? RESOUNDINGLY yes. I no longer have to kill myself to have clean floors. And that is the best gift to give myself.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 15, 2025

recommand products

Black Premium cotton voile thobe with magenta pink print in floral design-D11605
101.25
Santa Monica Airport Runway 21 throw blanket (white)
47.95
Honda Genuine Parts Number 77410SWA003 DUCT ASSEMBLY CTR
1424.00
Aru Hand Towel
23.95
Army Of The Republic Of Vietnam 1955-75
27.95