Pay in installments of $9.00 with
,
and
Shipping Estimate
USA
- USA
- CAN
- USA
- CAN
Ships within 48 hours · Estimated delivery Aug 17 - Aug 22
Promo Codes Available:
For Your Every Summer RSVP, with Code: SUMMER15
Description
Hydraulic Manifold Assembly Connector Kit – Fits MerCruiser Alpha One Gen 2 & Bravo Drives (Replaces 8M0137703, 8M0080805, 98825A4, 98825A12)Hydraulic Manifold Assembly Connector Kit Fits MerCruiser Alpha One Gen 2 & Bravo Drives This hydraulic manifold connector assembly is designed for MerCruiser stern drives, including MC 1, R, MR, Alpha One Gen 2, and Bravo I, II, and III models from 1983 and newer. It serves as a crucial component for the power trim hydraulic system, ensuring reliable fluid distribution. This kit provides a direct replacement for multiple OEM and aftermarket part
Hydraulic Manifold Assembly Connector Kit – Fits MerCruiser Alpha One Gen 2 & Bravo Drives
This hydraulic manifold connector assembly is designed for MerCruiser stern drives, including MC-1, R, MR, Alpha One Gen 2, and Bravo I, II, and III models from 1983 and newer. It serves as a crucial component for the power trim hydraulic system, ensuring reliable fluid distribution.
This kit provides a direct replacement for multiple OEM and aftermarket part numbers, restoring the integrity and function of your vessel's trim and tilt hydraulics.
- Installation: Direct bolt-on replacement for a straightforward installation.
- System Connection: Features 2 hydraulic line inputs and 4 outputs.
- Construction: Made from corrosion-resistant aluminum for durability in marine environments.
Part Number Cross-Reference
Use this table to confirm equivalent part numbers across OEM and aftermarket brands.
| Brand | Part Number |
|---|---|
| Mercury / MerCruiser | 8M0137703 |
| Mercury / MerCruiser | 8M0080805 |
| Mercury / MerCruiser | 98825A4 |
| Mercury / MerCruiser | 98825A12 |
| GLM | 21970 |
| Sterndrive Engineering | 9F-116-17K |
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 | MC-1 | 1983 & Up | 8M0137703/8M0080805 | |
| MerCruiser | R | 1983 & Up | 8M0137703/8M0080805 | |
| MerCruiser | MR | 1983 & Up | 8M0137703/8M0080805 | |
| MerCruiser | Alpha One Gen 2 | 1991 & Up | 8M0137703/8M0080805 | |
| MerCruiser | Bravo I | 1983 & Up | 8M0137703/8M0080805 | |
| MerCruiser | Bravo II | 1983 & Up | 8M0137703/8M0080805 | |
| MerCruiser | Bravo III | 1983 & Up | 8M0137703/8M0080805 | |
| MerCruiser | Bravo X | 8M0137703/8M0080805 | ||
| MerCruiser | Bravo XR | 8M0137703/8M0080805 | Includes XR sportmaster | |
| MerCruiser | Bravo XZ | 8M0137703/8M0080805 |
Technical Specifications
| Specification | Value |
|---|---|
| Product Type | Hydraulic Power Trim Line Manifold Connector Assembly |
| Installation | Direct bolt-on replacement |
| Connection | 2 inputs, 4 outputs |
| Housing Material | Aluminum |
| Housing Color | Silver/metallic |
| Weight | 0.40 lb (0.18 kg) |
| Other Technical Attributes | Corrosion-resistant aluminum construction |
Package Contents
- 1 x Plate
- 1 x Junction Block Body
- 2 x Gaskets (Replaces 27-98823-1)
- 2 x Lockwashers (Replaces 13-78968)
- 2 x Mounting Bolts/Screws (Replaces 10-28668)
Installation Guide
- Safety First: Disconnect the boat's battery and ensure the stern drive is in the fully down position and properly supported.
- Access the Manifold: Locate the hydraulic manifold assembly on the gimbal housing. It is typically found where the hydraulic lines enter the transom.
- Drain Fluid: Place a drain pan under the assembly to catch any residual hydraulic fluid upon disconnection.
- Disconnect Lines: Carefully disconnect the four hydraulic lines from the manifold block. Label them to ensure correct reassembly.
- Remove Old Assembly: Unbolt the two mounting screws holding the manifold body and plate to the housing. Remove the entire old assembly, including gaskets.
- Clean Surface: Thoroughly clean the mounting surface on the gimbal housing to remove old gasket material and corrosion.
- Install New Assembly: Place one new gasket onto the new manifold body, position it against the housing, place the second gasket on the plate, and secure the new assembly using the new mounting bolts and lockwashers.
- Reconnect Lines: Reconnect the four hydraulic lines to their correct ports on the new junction block. Ensure fittings are snug but not overtightened.
- Refill and Bleed: Refill the power trim pump reservoir with the manufacturer-recommended hydraulic fluid. Cycle the trim up and down several times to bleed air from the system, checking the fluid level and topping off as needed.
- Check for Leaks: With the system pressurized, carefully inspect all connections for any signs of hydraulic fluid leaks before returning the vessel to service.
Troubleshooting & FAQ
How do I confirm this fits my engine?
This kit is designed for a wide range of MerCruiser drives from 1983 and newer, including MC-1, R, MR, Alpha One Gen 2, and Bravo series. The best way to confirm fitment is to match your existing part number to those in our cross-reference list, such as 8M0137703, 8M0080805, or 98825A4.
What are the signs that my hydraulic manifold needs to be replaced?
Common symptoms of a failing manifold include visible hydraulic fluid leaks around the connector block, a spongy or unresponsive trim/tilt system, or obvious physical damage like cracks or heavy corrosion on the aluminum housing.
Is this a complete kit for the job?
Yes, this is a comprehensive replacement kit that includes the manifold block, plate, mounting bolts, lockwashers, and the necessary gaskets. You will only need basic hand tools and the appropriate MerCruiser power trim hydraulic fluid.
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
4.2 ★★★★★
Based on 24 reviews
Sort
Product Reviews
★★★★★ 5
It delivered on more levels than I imagined or expected
Color: White
EDIT: I've used this frother pretty much daily, sometimes more than daily, since ordering it, and it has performed very well.
I make turmeric/ginger/pepper milk most nights. The way this frother performs for that use astounded me. I bought it for coffee/cocoa/mushroom drinks, then while waiting for it to arrive realized it might work with the "golden milk."
First, the little frother uses a closely/precisely applied heat drawing 550w. The thick steel pot nestles down into the heating base, and the cover fits nice and snugly. So I'm not heating an entire thick saucepan perched atop an entire stove burner (1,000-1,500 w), with all the escaped heat that involves.
Second, I'm not standing there with thermometer in hand, diving into the open pan of heating milk to find that perfect sweet spot around 150-155...while constantly stirring and making sure not to let it boil over.
Because, third, the little frother takes care of that part, with the thermostat auto shut off.
Fourth, it whisks the powders smoothly in. Manufacturer suggests starting the whisk movement in the milk, then adding the powders. They did collect a bit in the low vortex around the stem of the little assembly that holds the various whisk/stir/froth blades, but I just stuck a spoon handle in there carefully, and it redistributed easily around the magnetic-driven stirring assembly.
And finally, omigosh, the lovely velvety texture!
Since these spices express best with extended warming, I'm making one batch, heated and frothed to 160F, then follow that with just milk frothed to 140. While the second batch is running (there's a cool down pause in the process, hastened by rinsing the pot exterior in cold water and of course drying it before putting it on the base), the first batch is steeping the spices...so the combined result is perfect.
EDIT: It did its job much faster than I expected (minutes). So I tested it as promised on my "solar generator" backup unit. My thought was that this would make my usual most efficient option for heating milk in those conditions the second most efficient: open saucepan atop a multi-watt-level portable induction cookplace on the 600w setting. And with much less cleanup at a time when water is scarce (electric well pump). We had a power outage here last week. Yep, the 550w frother ran on a Jackery 2000 for the few minutes it took to heat/froth milk--no trouble whatever and hardly put a dent in the charge. WOW. (Technically speaking it could run continuously, continuously heating, for over 3 1/2 hours on a full 2000 kWh charge.)
EDIT: This isn't a reduction in stars, just an observation. The frother "tree" assembly that does the business of stirring/whisking/frothing--I thought to order a spare in the event of damage to the original. They are very hard to find online. Maestri House lists the replacement part as "out of stock." Also out of stock, replacement pot and lid. This might be a concern to some considering the tool. But it seems to be well made and I hope gives long service.
EDIT: As of May 2026 the little frother is still working exceptionally well on a nearly daily basis. I purchased it in October of 2025, so that shouldn't be a surprise...but just sayin'. :^>
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 27, 2025
★★★★★ 5
This is the one to get
Color: Black
I find having separate controls for temperature and foam density is critical and this model nails it. The "newer model" listed in the product description eliminates the separate controls and does not function as well. This frother also has nice features such as the ability to produce cold foam and easy cleaning. It is also extremely quiet. I've tried several mid-range electric frothers and this is the best.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 11, 2026
★★★★★ 5
So far. so good.
Color: White
This is my 3rd frother that I purchased from Amazon. The others were brand name frothers that broken within a few months of use. I won't name here (hint: begins with an N and ends with an o) This Milk frother from Maestri however works excellent. Multiple heat and drink settings and makes the perfect foam every time. I especially like how the pitcher is removable from the electric base and can be washed with out worry. easy to use. Just read the manual to understand all the settings, makes a perfect froth in less than 2 minutes. I've only had this for a few weeks but I am impressed.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 11, 2026
★★★★★ 4
Loving it so far!
Color: White, Color: White
02 Nov 2025
I've only used this twice and I already love it. My main reason for buying it is for protein hot chocolate I drink twice a day. I previously made it at the stove and that took 13 minutes of constant mixing to reach 160°.
My hot chocolate is 1 cup of milk, 1 tbsp each cacao powder and panela (sugar), 1-2 tbsp collagen powder, vanilla extract, and 1 whole egg. I premix everything before pouring it into the frother because, while it may be able to handle the powders, there's no way that whisk will be able to break the whole egg enough to thoroughly blend it before it starts cooking. I'm totally fine premixing the night before and heating it in the morning. I made the first batch this morning with 2 cups of milk doubling only the cacao and sugar which brought it to just below the top max line, and it came out perfect. It was smooth and there was no burnt taste. I used the recommended hot chocolate attachments, lowest froth setting, and 160° temp setting. I had almost no froth in my hot chocolate which was perfect. I removed the pitcher as soon as it was done to prevent any burning. I checked the temp with a thermometer and the temp was actually 165°. I don't really know if that would impact the taste if there was less milk. For the 2 cups, it was still perfect.
I do wish there was a little more temp control like a 150° or 155° setting. I also wish it was able to give you the temp as it was heating in case you want to pull it off just before it hit the set temp. The bottom right button is superfluous. It helps with the foam setting, but you can also simply press each of those buttons directly.
Cleaning is super easy, just remove the pitcher and attachments. I love that the attachments are magnetic, but I recommend taking them out before pouring because the magnets aren't that strong. All in all, great for the price and perfect for my needs.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 2, 2025
★★★★★ 5
Outstanding machine with loads of uses
Color: Black, Color: Black
First off the TLDR: If you have an espresso machine, buy this. The Maestri 4 in 1 is a solidly built little machine that I truly enjoy using. It has a one piece stainless steel pitcher that is dishwasher safe and the spinner has a removable metal frother. So the only plastic touching your beverage is the small plastic spinner. As of January 2026, there is a coupon for $20, off making it $48 and for this price it simply cannot be beat. Now, if you’d like to know why I bought this over the Velvitiser read on. This is meant to be detailed and helpful for those looking at these two machines or wanting to get the most out of this one. First, cost did not really factor in. I mean I’m not looking to get ripped off, but I would rather wait and save for a superior machine, than purchase an inferior one that I will be unhappy with and is likely to break on me. Just getting that out of the way. Also I looked at the new hot and cold cocoa maker that comes with the hot cocoa mug and the iced chocolate milk glass, as well as a starter kit of 10 cocoa pouches, 5 hot and 5 cold. $179. So why did I get this instead? 1. The Velvitiser, while a beautiful machine (and it is pretty) uses a proprietary hook type spinner to whisk the cocoa while it heats it. Because of this, it is designed to be used with their proprietary hot cocoa packets, which is why 10 are included. You can upgrade to 40. And of course more are on the site. There are also subscription options. However this unit was specifically designed for the cocoa butter content, size of granules, and melting point of their chocolate, you cannot use ANY OTHER chocolate, powder, matcha, etc with it - and doing so VOIDS your warranty. Now people have done it, mostly after a year when the warranty runs out. But they risk burning out the motor. The Maestri on the other hand can use just about anything. As long as you don’t drop a whole azz bar of chocolate in the thing, you’re golden. So far, the chocolate I’ve used is: Cocoa powder, Ghirardelli Sweet Ground Chocolate, and Ghirardelli white chocolate which I grated. They worked beautifully and the drinks were delicious. Also, unlike the Velvitiser, “based on the Aztec Molinillo”, I can grate and use Abuelitas Mexican Chocolate. Take that! Also, this machine goes beyond chocolate, see point 3 for other options. 2. It only holds 8 oz. Well technically 9oz but it counts on 8 oz of milk and an oz of chocolate. Hope you’re not married. Or have a boyfriend. Or a big mug. I wanna make a hot chocky for hubby and me. If I’d gotten this I would have had to make the first mug, give it to him, refill with more milk, more chocolate, and wait for the machine. And let’s be honest, by the time my mug was ready, his would be empty. 😩 The Maestri holds two cups or 16oz, and if you pour that into the pitcher you are still well under the Max Fill Line. It’s plenty to share or for my biggest mugs it’s also great when I make iced drinks or soup which brings me to 3. The Velvitiser was very limited. I had my choice of hot cocoa or the next big thing, COLD cocoa newly introduced in September 2025. That’s it. And I hope you like their flavors cause they are your only options. Now I’m not gonna lie, they look delicious. And they almost had me with the banana milk. But they are clearly operating on a subscription model here. Also, I wanted more options. So the Maestri whispered cold foam and here we are. I’m glad I went with this because yes, the Maestri 4 in 1 will do cold foam. It will also do all kinds of cold drinks. If you have an espresso maker buy this. I should probably put that at the top. Mix any of your syrups or sauces with milk and hit the first button (snowflake). Cookie Butter Milk. Hazelnut Milk. I will buy banana syrup and have Banana Milk (I hope it tastes like Banana Runts), And you can use it to mix up your morning protein shake, as long as it’s not super thick (this is not a blender). I make protein coffee so this is a HUGE step up from my old crappy shaker with the little wire ball in it. Of course you can heat and foam your milk for cappuccinos and lattes, middle button. But I also take out the foaming ring and use that setting to make veggie broth, miso soup, and vegan ginger chik’n broth. As long as you don’t have veggies or other chunks in there you can heat up/cook any clear broth. The last button is the Cocoa button. I’ve made tons of stuff with that. Hot chocolate, mocha, golden milk, matcha, and even chai. Be sure to heat your water and milk using the machine, then steep your tea. Remove your tea bag or loose tea and spices before you run the machine again to add your sugar. None of this was possible with the Velvitiser. This machine looks nice on my espresso bar, I like that the pitcher is held to the base magnetically. I love how easy it is to clean. But most of all I absolutely love how versatile it is. I’ve only had it a short period of time but it has become central to my drink making. I use it each morning for my espresso, I use it to make an iced drink at some point during the day, and it’s winter so I am using it to make a broth most days as well. So yeah, glad I went with the Maestri 4 in 1. It’s my favorite new addition to the espresso station.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 18, 2026