SKU: 85377127029

8M0251133 Water Pump Impeller Kit for Mercury 30HP 40HP | JLM Marine

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Description

8M0251133 Water Pump Impeller Kit for Mercury 30HP 40HP | JLM Marine8M0251133 Water Pump Impeller Kit for Mercury 30HP 40HP JLM Marine This comprehensive water pump impeller kit is engineered to fit Mercury 30HP and 40HP 3 cylinder carbureted outboard engines with 2: 1 gear ratio configurations. Designed for models with short shaft and standard gearboxes, this kit ensures reliable cooling system performance across a wide range of serial numbers from 0G231123 through 1C018825. This aftermarket replacement kit directly

8M0251133 Water Pump Impeller Kit for Mercury 30HP 40HP | JLM Marine

This comprehensive water pump impeller kit is engineered to fit Mercury 30HP and 40HP 3-cylinder carbureted outboard engines with 2:1 gear ratio configurations. Designed for models with short shaft and standard gearboxes, this kit ensures reliable cooling system performance across a wide range of serial numbers from 0G231123 through 1C018825.

This aftermarket replacement kit directly replaces OEM part number 8M0251133 and provides a complete service solution including the impeller, gaskets, wear plate, thermostat, fuel filters, oil filter, and gear oil pump—everything needed for a thorough cooling system and maintenance service.

  • Complete 16-piece kit with impeller, thermostat, fuel filters, oil filter, and gear oil pump
  • Fits Mercury 30HP and 40HP 3-cylinder carbureted models with 2:1 ratio gearboxes
  • Includes all necessary gaskets, wear plate, and water tubes for proper installation

Part Number Cross-Reference

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

Brand Part Number
Mercury 8M0251133

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 Engine Type Serial Number Range Notes
Mercury 3-Cylinder Carbureted 40HP 3cyl Carb 1B227000-1B344306, 1C000001-1C018825 Short Shaft, 2:1 Ratio
Mercury 3-Cylinder Carbureted 40HP 3cyl Carb 0P401000 & Up, 0T409000-1B2266999 2:1 Ratio, Short Shaft
Mercury 3-Cylinder Carbureted 40HP 3cyl Carb 0G231123-0P400999 All Standard Gearboxes
Mercury 3-Cylinder 30HP 3cyl All Models Gear Box Ratio 2:1

Technical Specifications

Specification Value
OEM Part Number 8M0251133
Compatible HP Range 30HP, 40HP
Engine Configuration 3-Cylinder Carbureted
Gear Ratio 2:1
Shaft Length Short Shaft (select models)
Kit Components 16 pieces

Package Contents

This comprehensive kit includes 16 components for complete cooling system service and routine maintenance:

  • 47-85089-10 Water Pump Impeller × 1
  • 8M0032838 85119 Impeller Key × 1
  • 821354-2 Wear Plate × 1
  • 27-822189 Gasket × 1
  • 27-822217 Gasket × 1
  • 12-86645-1 Washer × 2
  • 823547 1 Water Tube × 1
  • 43023 Water Tube × 1
  • 825212T02 Thermostat × 1
  • 27-8M0177107 Gasket × 1
  • 35-877565T1 Fuel Filter × 1
  • 35-8M0149607 Fuel Filter × 1
  • 35-822626Q2 Oil Filter × 1
  • 8M007119 Drain Gasket × 1
  • 8M0204693 Drain Gasket × 2
  • 24OP149 Gear Oil Pump × 1

Installation Guide

  1. Disconnect the fuel line and remove the lower unit from the outboard motor following your engine's service manual procedures.
  2. Remove the water pump housing bolts and carefully separate the housing from the driveshaft assembly. Inspect the housing for cracks or damage.
  3. Remove the old impeller, impeller key, and wear plate from the pump housing. Clean all surfaces thoroughly, removing any debris or old gasket material.
  4. Install the new wear plate into the pump housing, ensuring proper alignment with the mounting holes.
  5. Lubricate the new impeller with glycerin or soapy water (never petroleum-based products). Insert the impeller key into the driveshaft slot.
  6. Install the impeller onto the driveshaft, rotating the blades in the correct direction (typically clockwise when viewed from above). Ensure the impeller key seats properly.
  7. Replace the water tubes with the new ones provided (part numbers 823547 1 and 43023), checking for proper fit and no obstructions.
  8. Install new gaskets (27-822189, 27-822217, and 27-8M0177107) on all mating surfaces. Do not reuse old gaskets.
  9. Replace the thermostat (825212T02) in its housing, ensuring the temperature-sensing element faces the correct direction per your service manual.
  10. Reassemble the water pump housing to the lower unit using the washers (12-86645-1) and tighten bolts in a cross-pattern to manufacturer specifications.
  11. Reinstall the lower unit to the engine. Replace the fuel filters (35-877565T1 and 35-8M0149607) and oil filter (35-822626Q2) per your maintenance schedule.
  12. Use the gear oil pump (24OP149) and new drain gaskets (8M007119 and 8M0204693) to change the lower unit gear oil. Run the engine with water supply and check for proper cooling stream.

Troubleshooting & FAQ

Q: How do I confirm this kit fits my Mercury engine?
A: Check your engine's serial number plate and compare it to the compatible ranges listed above (0G231123 through 1C018825). This kit fits 30HP and 40HP 3-cylinder carbureted models with 2:1 gear ratio gearboxes.

Q: How often should I replace the water pump impeller?
A: Mercury recommends replacing the water pump impeller annually or every 300 hours of operation, whichever comes first. Replace immediately if you notice reduced cooling stream or overheating.

Q: What are the signs my water pump impeller needs replacement?
A: Warning signs include weak or absent cooling water stream from the indicator, engine overheating, steam from the engine, or reduced water pressure. Impeller blades may become cracked, broken, or worn over time.

Q: Can I use petroleum-based lubricants when installing the impeller?
A: No, never use petroleum-based products on the impeller as they can damage the rubber. Use only glycerin, dish soap mixed with water, or dedicated impeller installation lubricant.

Q: Does this kit include everything I need for a complete water pump service?
A: Yes, this 16-piece kit includes the impeller, gaskets, wear plate, water tubes, thermostat, and even fuel filters, oil filter, and gear oil pump for comprehensive maintenance. You'll have all critical cooling system and service components in one package.

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: 85377127029

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Panda Incognito
Battle Creek, US
★★★★★ 4
Powerful and Hard-Hitting
Format: Paperback
This book explores how racism and disability justice issues intersect and intertwine, particularly within the American church. Lamar Hardwick writes from his perspective as an autistic Black pastor, and his recent battles with cancer also inform his writing. He takes an incisive look at the ways that people sideline and make judgments about "abnormal" bodies, and he explores how different racist and ableist ideas developed in early American history, primarily related to enslaved Africans. Because I share Hardwick's interest in American history, I was already familiar with most of this information, but it will be new and eye-opening for many readers. Hardwick clearly explains the historical connection between ableism and racism, showing how people justified slavery by arguing that Black people were intellectually inferior, were childlike, and should not have agency over their own lives. Hardwick explores both glaring and subtle implications of this ideology, and he makes a number of very excellent points. He is bold and doesn't mince words, and he explains complicated, abstract ideas in accessible terms. He also touches on a variety of side issues to his main thesis, such as desirability politics, body shame, and issues with grind culture. Hardwick gives examples of how early American Christians contributed to pervasive cultural problems, and he also shares contemporary stories to show how problematic ideas cause harm in real life. His personal stories add a lot to the book, and I appreciate his honesty and vulnerability. I also appreciate how Hardwick uses Scripture throughout the book, especially when he is writing about disability theology. Some similar books focus primarily on personal experiences and secular social justice theories, with only loose Scriptural connections, but Hardwick bases his arguments in specific Bible passages and the big story of Scripture. I disagree with some of his interpretations, but found his arguments significantly more persuasive than ones I've seen before. One confusing, weaker element of this book is that Hardwick begins using "ableism" as a catch-all term for any kind of hierarchy of human value. Even though different forms of discrimination can overlap in complex ways, Hardwick often uses the word "ableism" in cases where there isn't a direct reference to physical or mental abilities. Because he stretches this word's definition, readers who are new to this conversation may struggle to follow his arguments at times. My other critique is that even though Hardwick is accurate and persuasive in his coverage of historical wrongs in the American church, he sometimes makes it sound like all of these issues started with American Christianity. Even though we can trace back particular expressions of racism and ableism to influential people like Cotton Mather, the root issues are part of the human condition. Many Christians throughout time have absorbed harmful ideas from their societies and expressed these assumptions in Christian language, but they weren't inventing these forms of oppression. Also, even though people created specific racist beliefs to justify the institution of slavery, ableism has been an issue in all cultures since the beginning of time. Christianity began in a cultural context where it was normal and acceptable for parents to discard female and disabled infants to die in the elements, and early Christian advocacy is part of why that is so gut-wrenching and unthinkable to us now. Even though Hardwick's analysis is helpful, it's only part of the story. I think that he could have balanced it out better with more context, while still holding the same American historical figures accountable for their sins and failings. "How Ableism Fuels Racism" covers a variety of issues in a thought-provoking, engaging way. I appreciate the author's historical analysis, thoughtful reflections, and personal stories, and I would recommend this book to people who are invested the topic. Also, even though some aspects of this book might be confusing for people who haven't read anything like this before, the author's accessible writing style, clear explanations, and personal stories can help engage readers who are new to the topic. Overall, I was impressed with this book and am interested in reading more from this author.
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Reviewed in the United States on February 21, 2024
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Verified Purchase
Kristen
Belleville, US
★★★★★ 5
Amazing Book Every Church Leader Should Read
Format: Paperback
Great Book and worth reading
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 6, 2024
L
LGB
Houston, US
★★★★★ 5
Provocative Read!
Format: Audiobook
I found this book to be profound, provocative, and very different than any other books I have read on racism and ableism. I never understood how ableism is the catalyst for racism, and how disability compounds racism. Highly recommend especially for those who are well versed in social justice.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 25, 2025
R
Richard P.
Dallas, US
★★★★★ 5
Destined to Be One of My Favorite Books of the Year
Format: Paperback
I will openly acknowledge that Lamar Hardwick, the lead pastor of Atlanta's Tri-Cities Church and a pastor with autism, wasn't on my disability theology radar and I wasn't sure what to expect from his upcoming release "How Ableism Fuels Racism: Dismantling the Hierarchy of Bodies in the Church." I was blown away. With "How Ableism Fuels Racism," Hardwick proposes that ableism and the resulting disability discrimination are the root causes of racial bias and injustice in American culture and in the church. Weaving together a tapestry of historical records, biblical interpretation, and disability studies, Hardwick examines how ableism in America led to the creation of images, idols, and institutions that would ultimately fuel both disability and racial discrimination. After engaging in this discussion, Hardwick calls the church into action to address the deeper issues of ableism and offers practical steps to help readers dismantle ableism and racism in both attitude and practice. As an ordained minister and seminary graduate who is also a paraplegic and double amputee, I've long immersed myself in the world of disability theology and long believed that the church embraces the hierarchy of bodies about which Hardwick writes. "How Ableism Fuels Racism" served up a myriad of Aha! moments for me and times when long-held beliefs were finally communicated with clarity. Interestingly, Hardwick even clarified for me what had troubled me with another book I recently read around the issue of "deconstruction." I may have actually shouted out "Yes, that's it!" I've long believed that being accommodated by a church is the ground floor step toward full inclusion. It's far from enough, yet for an institution that fought against the ADA it's often seen as the ultimate gift for those with disabilities. Instead, Hardwick argues that the church should be passionately pursuing those with disabilities and others outside the "typical" hierarchy of bodies." I'm telling you. Brilliant stuff here. I can't stop thinking about it. Precise in its criticism yet also constructive and forward thinking, "How Ableism Fuels Racism" confronts the shameful and shame-filled underbelly of American Christianity and offers a broader and more inclusive vision of God, faith, and church life. How much did I love this book? I'm already reading it again.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 20, 2024
I
ivory6194
Fort Morgan, US
★★★★★ 5
great read for those in the church who want to learn more about equality
Format: Kindle
While this book focuses on ableism and racism, I learned a significant amount about how the church has perpetuated ableism over the years and how the founding fathers of our country used religion and ableism as the initial forms of a caste system. Black bodies were seen as inferior and therefore were able in their minds able to be enslaved. This book is a great read for those in the church who want to learn more about equality and how we as a community and church can do better about falling into the trap that we may be "better than." Lamar Hardwick quoted many different authors and theologians, including one who wrote a book about how Jesus was disabled as a result of the crucifixion. This book is great food for thought and I recommend for those who want to learn more about how they and the church view those seen as different. "Racial slavery in the West began by using disability to make chattel slavery a matter of charity rather than a matter of equality. Defining Africans as mentally inferior and effectively disabled allowed for proslavery advocates to appeal to the Christian ethos of benevolence." "The challenge is that beauty is an abstract concept. Our inability to define beauty without using a deficit model stands in contrast to our fundamental beliefs about how God created us. Our origin begins outside of us. An infinitely holy and wise God who creates with intention and intimacy placed us in the world. Acknowledging God's creative genius challenges us to believe that God does not create anything that is not beautiful in its own way."
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 11, 2024

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