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Description
Water Exhaust Shutter – Fits MerCruiser V6/V8 Stern Drives (Replaces 99370A2)Water Exhaust Shutter Fits MerCruiser V6 V8 Stern Drives (Replaces 99370A2) This water exhaust shutter fits MerCruiser 4. 3L V6, 5. 0L V8, and 5. 7L V8 engines with center riser manifolds, produced between 1982 and 1987. It is designed to install in the exhaust Y pipe, where its primary function is to prevent water from flowing back into the exhaust manifold and engine cylinders. This is a critical component for protecting your engine from water
Water Exhaust Shutter – Fits MerCruiser V6/V8 Stern Drives (Replaces 99370A2)
This water exhaust shutter fits MerCruiser 4.3L V6, 5.0L V8, and 5.7L V8 engines with center riser manifolds, produced between 1982 and 1987. It is designed to install in the exhaust Y-pipe, where its primary function is to prevent water from flowing back into the exhaust manifold and engine cylinders. This is a critical component for protecting your engine from water ingestion, especially during deceleration or when the stern is low in the water.
This part serves as a direct replacement for several OEM and aftermarket part numbers, ensuring compatibility and a proper fit for the specified engine models.
- Installation Location: Installs inside the exhaust Y-pipe.
- Primary Function: Prevents water backflow into the engine.
- Construction: Made from durable rubber with a steel rod hinge for longevity.
Part Number Cross-Reference
Use this table to confirm equivalent part numbers across OEM and aftermarket brands.
| Brand | Part Number |
|---|---|
| MerCruiser | 99370A2 |
| Sierra | 18-2733 |
| GLM | 89170 |
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 | V6 | 4.3L | 4-Stroke | 1982-1987 | 99370A2 | Used on center riser manifolds |
| MerCruiser | V8 | 5.0L | 4-Stroke | 1982-1987 | 99370A2 | Used on center riser manifolds |
| MerCruiser | V8 | 5.7L | 4-Stroke | 1982-1987 | 99370A2 | Used on center riser manifolds |
Technical Specifications
| Specification | Value |
|---|---|
| Product Type | Water Exhaust Shutter/Flapper |
| Installation | Installs in exhaust Y-pipe |
| Connection | Pin/hinge design |
| Housing Material | Rubber with steel rod |
| Housing Color | Black |
| Dimensions | 3-inch design |
| Fitting Type | Direct-fit replacement |
| Other Technical Attributes | Prevents water backflow into exhaust manifold and engine |
Package Contents
- 1 x Water Exhaust Shutter (99370A2)
Installation Guide
- Ensure the engine is off and cool, and disconnect the battery for safety.
- Locate the exhaust Y-pipe at the rear of the engine assembly.
- You may need to remove the exhaust bellows or related components to access the shutter.
- Carefully remove the old, worn-out shutter from its mounting point within the Y-pipe.
- Thoroughly clean the interior of the pipe where the shutter sits to remove any debris or corrosion.
- Position the new shutter correctly, ensuring its hinge mechanism moves freely.
- Reinstall any components that were removed to gain access.
- Reconnect the battery, start the engine, and check for any unusual exhaust noises.
Troubleshooting & FAQ
Q: How do I confirm this fits my engine?
A: This shutter is for MerCruiser 4.3L V6, 5.0L V8, and 5.7L V8 engines (1982–1987) with center riser manifolds. Please verify your engine model and year against the compatibility list and ensure your current part number matches 99370A2 or its aftermarket equivalents.
Q: What are the signs of a failing exhaust shutter?
A: Common symptoms include a distinct rattling or clanking sound from the exhaust system at idle, water ingestion into the engine cylinders (which can cause severe damage), or visible cracks and deterioration of the old rubber flapper.
Q: How is this part different from the OEM version?
A: Our aftermarket shutter is designed to meet or exceed original equipment specifications for fit, form, and function. It is made with high-quality rubber and steel materials to ensure reliable performance in a marine environment.
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:
- 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
4.3 ★★★★★
Based on 5 reviews
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Product Reviews
★★★★★ 3
Not a bad start
Format: Kindle
3 stars
Thank you Netgalley and Briar Boleyn for the ARC!
A camelot/king Arthur retelling with fae. I was hooked by the idea of this book immediately and was eager to jump into this world.
• slow burn
• enemies to lovers
• who did this to you
Morgan Pendragon watched her mother die by her father's hand when she was just eight years old, hiding under the bed. Morgan is believed to have the tainted blood of the fae in her veins and is cast aside so that her fathers illegitimate son, Arthur, can become the king. She's seen his cruel treatment of the fae firsthand, so when he sends her on a journey to find a fae weapon she seizes the opportunity to do more with her life. Along the way, she finds more than she could have imagined.
I don't know a whole lot about King Arthur and Camelot but I had a lot of fun with this story! The plot has some similar tropes to popular romantasy books (From blood and ash) but there's enough originality here that it doesn't feel like I'm reading a copy. I liked how the fae were different in appearance than what is typical in most fantasy books I've read. In this book they have blue hair, violet skin and a wide range of other characteristics. I thought that the world building was easy to follow and I could easily immerse myself into this world. After reading the blurb I kept wondering when she was going to go on the journey to find Excalibur and it doesn't happen until around the 45% mark.
The story is a bit slow at times but starts to pick up once they begin their journey to find Excalibur. The John Wick style Inn was a fun concept that I enjoyed reading about.
There are a lot of similarities to this and FBAA and I would have liked to have it be a little more different, but I'm hoping book two will have the story turn into something of its own. Overall I enjoyed reading this story and I'm looking forward to reading book two especially after that ending.
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Reviewed in the United States on May 27, 2023
★★★★★ 5
Unraveling Fate and Fae: A Captivating Journey in "Queen of Roses"
Format: Kindle
"Queen of Roses" by Briar Boleyn is a dark fantasy romance that masterfully combines elements of myth, magic, and romance with a captivating King Arthur retelling infused with a Fae twist. From its intricately woven plot to its compelling characters, this novel delivers an immersive reading experience that will leave readers eagerly anticipating the next installment.
At its core, "Queen of Roses" is an enchanting tale of forbidden love and destiny, featuring an exceptionally slow-burn romance that ignites with the intensity of an enemies-to-lovers trope. Against a backdrop of magic and mythical creatures, the story unfolds with tension, banter, and forced proximity, drawing readers into a world filled with love, friendships, self-discovery, and betrayal.
While the novel excels in world-building, character development, and plot intricacies, some readers may yearn for a bit more fire and spice in certain aspects of the narrative. However, the promise of future developments in the series offers hope for an even more dynamic and engaging story to come. I know I personally cannot wait to get into book 2.
With a cliffhanger ending that leaves hearts racing and minds reeling, "Queen of Roses" succeeds in immersing readers from start to finish. Its dark and twisted fantasy elements are expertly balanced with moments of adventure, action, and unexpected twists, keeping readers on the edge of their seats until the very last page.
As the story delves into complex themes and explores the depths of its characters' struggles and desires, it's important to note that "Queen of Roses" may contain triggering content. Readers are advised to check the trigger warnings before diving into this captivating tale.
Overall, "Queen of Roses" is a must-read for fans of dark fantasy romance, offering a mesmerizing journey that will leave readers eagerly anticipating the next chapter in the series. With its lush prose, intricate storytelling, and unforgettable characters, this novel is sure to leave a lasting impression on all who venture into its enchanted world.
I want to extend a heartfelt shoutout to the author for granting me the opportunity to dive into "Queen of Roses" through NetGalley. It has been an absolute pleasure to explore the captivating world and characters crafted with such skill and imagination. Thank you for entrusting me with this glimpse into your enchanting world.
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Reviewed in the United States on April 1, 2024
★★★★★ 4
Right from the start, I was drawn in by the prologue!!!
Format: Paperback, Format: Paperback
Queen of Roses (Blood of a Fae #1) by Briar Boleyn
Genre General Fiction ( Adult), Romance, Sci-Fi & Fantasy, Dark Romance
“More primordial than the stars. My name was on his lips as he promised unspeakable darkness to any who came between us.”
Right from the start, I was drawn in by the prologue!!!
I’m a big fan of “touch her, and you die” vibes, but I mean, what’s also not to love about a unique Arthurian retelling with gender twists, a treacherous royal court, a dangerous quest, magical Fae & mystical monsters, entwined with a bit of spice!
Morgan, Princess of Pendrath and true heir to the throne has spent most of her life dimming her light to feel safe and to make others comfortable. She is treated as an outcast in the court and repressed by her family due to the blood of the Fae within her and forced to join the Temple of the Three as a priestess in training to one day replace Merlin.
Her brother, King Arthur, who reminds me of Joffrey from Game of Thrones, later tells her that he has other plans and offers her a choice of the Temple or to marry her off for political gain, unless… that is, she can journey through the great unknown and return with a long-lost fae weapon with enchanted powers known as Excalibur.
Her quest begins with a roguish crew that includes the mysterious, arrogant, and heart-tuggingly handsome Captain of the Royal Guard, Kairos Draven, whom she can’t decide if she wants to stab or indulge in pleasure with.
Along the way are plenty of surprises, mystical creatures, and betrayal, all while Morgan uncovers more of the truth about herself and who she can trust.
This book had intriguing storylines and lovable characters that kept me turning pages and wanting more. I can’t wait to see how it all unfolds and comes together in book 2, Court of Claws, which I just started reading!!
Read if you’re into-
Dark Fantasy/Romance
Slow–Burn
Question Everything
Magic and Action
Fae
Arthurian Legend
Stabby/Broken FFC
Morally Gray MMC
Forced Proximity
Queen of Roses is perfect for Holly Black, Jennifer L. Armentrout, and Sarah J. Maas fans.
Please check the trigger warnings page in the table of contents before reading this book.
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Reviewed in the United States on August 16, 2023
★★★★★ 3
3.5 stars, A little boring to say the least.
Format: Kindle
Wow so I'm not sure where to begin on this one. This was a very different take on the legend of Arthur and Excalibur. This is told from the point of view of Morgan the sister of Arthur. Honestly the first 50% of this book is world building and character building which unfortunately was super boring for me. Morgan to me was a female MC that had a hard time in believing in herself. Sometimes taking too long to understand exactly what was going on around her. Draven was also a different male MC, like I couldn't put my finger on him and what he was all about. It was not until the last 10% of the book did we get some answers on the mystery that is Draven. The other 50% of the book centered around this big journey with everyone having a different motive. We see a spark of magic around this time that had me excited but then we never expanded upon that and what it could mean for the female MC. I feel like I want to read the second book just to see where this goes, but the spice was probably a 2 out of 5. Side characters are ok, Lancelet was fun but I almost felt like I wanted more.
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Reviewed in the United States on September 13, 2023
★★★★★ 5
A bewitching retelling of Arthurian legend!
Format: Kindle
In a land where the Fae have nearly become only a legend and those who still posses even a morsel of the blood are few and far between, Morgan finds herself cast aside by most of society due to her rumored half-Fae lineage, including her brother, King Arthur. With the kingdom at the brink of war, Arthur entrusts her with a quest to retrieve a Fae weapon of legendary power: the sword of Perun, Excalibur. Accompanied by men she loathes, Captain Kairos Draven and Ragnar Whitehorn, she embarks on her long and unbeknownst perilous journey, only to find that things she once believed to be myth are in fact very real. With devastating twists, omitted truths, witty banter and fierce action, Queen of Roses leaves you begging to know more about the secrets of Aercanum!
Wow, wow, wow! Going into this story, I did not realize that it was going to be a retelling of Arthurian legend, especially not one with a fantastical twist! The unique spin almost gave me The Witcher vibes and I think adding Fae into the mix was quite interesting. I knew the basics of the legend but after reading this book, it has piqued my interest and makes me want to learn more about it. My attention was snatched as soon as I finished the prologue and I knew that I was going to devour this story. I truly enjoyed the gender swaps and even how Arthur was portrayed as villainous. Morgan’s past and even her parts of her present is absolutely heartbreaking, and I felt for her at times. I can only recall one other book that made me hate characters the way I despised Florian and Arthur, leaving me with my blood boiling and feeling disgusted. Even after finishing the book, Draven is still a mystery to me and I cannot figure out how to feel about him. I guess they just means that the author did an excellent job at conveying each character’s persona! The rich world building and imagery made it easy for me to visualize the places that the group visited along their journey. I am truly engulfed in this story and I cannot wait to see wait fate awaits Morgan and how the Fae will be even more incorporated in the next book!.
I received a free copy of this book and am voluntarily leaving a review.
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Reviewed in the United States on August 11, 2023