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Description
Water Pump Impeller – Fits Johnson/Evinrude 35-55 HP Outboards (Replaces 377230, 777213)Water Pump Impeller Fits Johnson Evinrude 35 55 HP Outboards (Replaces 377230, 777213) This aftermarket water pump impeller is designed for Johnson Evinrude 35 55 HP 2 Stroke outboard motors from 1958 to 1978. It serves as a direct replacement for the original component to ensure your engine maintains proper cooling and avoids overheating. It directly replaces the following OEM and aftermarket part numbers: Johnson Evinrude 377230, 777213, 777821;
Water Pump Impeller – Fits Johnson/Evinrude 35-55 HP Outboards (Replaces 377230, 777213)
This aftermarket water pump impeller is designed for Johnson/Evinrude 35-55 HP 2-Stroke outboard motors from 1958 to 1978. It serves as a direct replacement for the original component to ensure your engine maintains proper cooling and avoids overheating.
It directly replaces the following OEM and aftermarket part numbers: Johnson/Evinrude 377230, 777213, 777821; Sierra 18-3083; and Mallory 9-45209.
- Material: Constructed from durable neoprene rubber with a brass hub for saltwater resistance.
- Function: Restores pump performance to prevent engine overheating.
- Installation: Direct replacement fit in the water pump housing.
Part Number Cross-Reference
Use this table to confirm equivalent part numbers across OEM and aftermarket brands.
| Brand | Part Number |
|---|---|
| Johnson/Evinrude | 377230 |
| Johnson/Evinrude | 777213 |
| Johnson/Evinrude | 777821 |
| Sierra | 18-3083 |
| Mallory | 9-45209 |
Compatible Engine Models
Confirm your engine model/year in the table below. For Johnson/Evinrude owners, here’s a guide to help you identify your engine’s serial/model: Johnson/Evinrude Serial Number Guide.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Johnson | Various | 35 | 2-Stroke | 1958-1959 | 377230 | |
| Johnson | Various | 40 | 2-Stroke | 1960-1970 | 377230 | |
| Johnson | Various | 50 | 2-Stroke | 1971-1978 | 377230 | |
| Johnson | Various | 55 | 2-Stroke | 1971-1978 | 377230 | |
| Evinrude | Various | 35 | 2-Stroke | 1958-1959 | 377230 | |
| Evinrude | Various | 40 | 2-Stroke | 1960-1970 | 377230 | |
| Evinrude | Various | 50 | 2-Stroke | 1971-1978 | 377230 | |
| Evinrude | Various | 55 | 2-Stroke | 1971-1978 | 377230 |
Technical Specifications
| Specification | Value |
|---|---|
| Product Type | Water Pump Impeller |
| Installation | Direct replacement in water pump housing |
| Material | Neoprene rubber with brass hub |
| Dimensions | External Diameter: 69.81 mm (2 3/4"), Internal Shaft Insert Diameter: 15.91 mm (5/8"), Height: 21.79 mm (55/64") |
| Color | Black with brass center |
| Number of Blades | 6 |
| Durability | Resistant to salt water immersion |
| Application | OEM replacement for cooling system water pump |
Package Contents
- 1 x Water Pump Impeller (Replaces 377230/777213)
Installation Guide
Professional installation is recommended. The general steps are as follows:
- Safety First: Disconnect the battery and ensure the engine is off and cool.
- Access the Lower Unit: Drain the gearcase oil, then unbolt and carefully remove the lower unit (gearcase) from the outboard motor.
- Open Water Pump Housing: Locate the water pump assembly on top of the lower unit. Remove the bolts securing the housing cover.
- Remove Old Impeller: Slide the old impeller off the drive shaft. Note the rotational direction of the old impeller blades if possible.
- Install New Impeller: Lightly lubricate the new impeller and housing. Slide the new impeller onto the shaft, rotating it in the correct direction to seat the blades.
- Reassemble: Reinstall the water pump housing, ensuring all seals and gaskets are correctly placed.
- Reattach Lower Unit: Securely bolt the lower unit back onto the outboard and refill the gearcase oil.
- Test Operation: Reconnect the battery and run the engine with a water supply to check for proper water flow and temperature.
Troubleshooting & FAQ
Q: How do I confirm this impeller fits my engine?
A: The best way is to check your OEM part number. This impeller replaces Johnson/Evinrude part numbers 377230, 777213, and 777821. You can also use the compatibility table on this page to verify your engine's HP, model, and year range.
Q: What are the signs of a bad or failing water pump impeller?
A: Common symptoms include the engine overheating, an intermittent or weak water stream from the "tell-tale" outlet, or an audible alarm from your engine's warning system.
Q: How often should I replace the water pump impeller?
A: As a general maintenance rule, it’s recommended to inspect and/or replace the impeller annually or every 100 hours of operation, whichever comes first. This interval can change based on usage patterns and water conditions.
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
4.5 ★★★★★
Based on 7 reviews
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Product Reviews
★★★★★ 5
Great Addition!
Color: Black
Why did you pick this product vs others?:
I just started a powdered drink routine recently and was having a difficult time mixing it with water. I would consistently end up with small nuggets of mix making it unenjoyable to drink. I knew I needed a mixer and was glad I found this device when I did. It works perfectly! I like the fact that it comes with its own stand and included two mixing heads. It is solid, well-designed, and you can feel the quality when you pick it up. The variable speed of the mixer is perfect for ensuring that everything is blended well. I haven’t used it to “froth” anything yet, at least not on purpose, but I accidentally found out that it can do that well. This is a great addition to our kitchen and is very easy to wash after use. So far…no issues. Highly recommend for those of you looking for the right tool to make sure those protein mixes aren’t full of unmixed nuggets.
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Reviewed in the United States on June 21, 2025
★★★★★ 4
Low foam
Color: Black
Love this frother. It is great quality and the turn speed is amazing. My only issue is this. It comes w 2 wands and they are both singles. The single is great for stirring things up. It does not make a lot of froth and for some things it’s perfect but sometimes I like a lot of froth and I wish it either came w a single and a double or you could purchase a double separately to intermix. I don’t want to buy a whole other unit just for the double. I wrote to them bc the double frother they sell doesn’t look as good as this one but sometimes a girl needs a lot of foam and sometimes th stirring is perfect.
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Reviewed in the United States on February 20, 2026
★★★★★ 5
Still The Best Frother Ever!
Color: Black
I love how it is easy to use, how it holds a charge, and how much power it has. I've only charged it once since I got it & I've been using it on a daily basis!!! Though it isn't a long time, I'm happy with it so far! I definitely will recommend it to anyone looking for a great frother. If you are looking for one, look no further! You won't be disappointed! I've read some comments where they found it to be too strong that their drink spilled everywhere. But for me I have not had any incident of spilling over. I have used it both for my coffee and my matcha tea and it worked great without any spilling over. You just have to start with the lowest power and ensure that you have a large enough container to have a room for your frothing. My sister tried to use it recently during her visit to make us matcha tea. However, she experienced spillage all over the cup, because she had used a small cup. Otherwise, she liked it very much and said she will get one when her battery operated one stops working...
Another thing I like about the product was the customer service that I had received. When I got my first order which came quickly, it wasn't working after having charged it over 24 hours. It was not turning on at all. I returned it and ordered a replacement which I received within a day or two. This time after charging it for the recommended amount of time, I was a bit skeptical when I turned it on. However, I was pleasantly surprised that it worked like it was supposed to and it has been working ever since having charged it only once so far. I may come back and give an update depending on how it does after 6 months of use, so keep in tune...
I don't know if there is a way to write a new entry as a follow up to the old entry, so I'm going to add my follow up comment over here.
May 23, 2025 - I love my frother more than I can say in words. It's functionality has not changed a bit from the time I have purchased it. It charge lasts several weeks to few months before I charge it again and the power is still the same. Recently I decided to buy another one for my office use. I like the white color and so tried it but that one wouldn't even turn on. And then I got a gray one to have a different color. That one was much weaker than the black one I own. Then I replaced it with another gray one within few days. I tried it and it was exactly the same as the one I already replaced. So then I decided to go with a black one again hoping that it would be the same as the one I have. The black one did much better than the gray ones in the strength or power of the frother. However, it is weaker than the one I already have been using since last August. While I am not very happy with the quality being inconsistent in all of the ones I have tried including the recent pictures of the black one, I have decided to keep the black one because it is relatively better than the gray ones I tried. What I don't understand is why there is inconsistency in the quality of the same product by the same maker. I am beginning to wonder if the black one I purchased in Augusta last year was anomaly of a quality and a good way. Maybe I lucked out on my older black frother, but I'm unsure if quality is going to get better if I were to order another one. I have a sister who is a pro in making coffee drinks and she was the reason I had ordered this frother to begin with. She uses a battery operated one at this time and I have been thinking about getting her one like mine. While I am still skeptical, I am going to give it a shot and order her one sometime soon. If it doesn't work, I guess we will return it back. But one thing that I am grateful is that I have been able to return every one of those that I have tried recently with no issues. I hope that I don't have to return my most recent purchase in black. I was not even able to review the new purchase because of the item being the same color which is crazy.
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Reviewed in the United States on September 8, 2024
★★★★★ 5
Outstanding Frother!
Color: Space Gray
Exceptional! This frother is in another league compared to the cheapo push button frothers. The motor is smooth, quiet and powerful. This has an intuitive thumb dial on top that operates smoothly with a wide range of smooth speed adjustment. It’s gentle enough to froth a little bit of milk for a macchiato and powerful enough to scramble 3 eggs. The head is removable for easy cleaning. It’s also rechargeable. I charged this the day I bought it on April first. I use it at least twice a day. It’s September 26th today and I have yet to recharge it and it’s not showing any signs of needing a charge. One minor quibble is that they give you 2 of the same frother heads. They are built so well, that I don’t imagine it ever wearing out. It would have been nice to get a whisk or something different. Not a deal breaker at all though.
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Reviewed in the United States on September 26, 2025
★★★★★ 5
Solid unit
Color: Black
Handheld Mixer/Frother Review
A Premium Choice That Transforms Morning Coffee
I am thoroughly impressed with this handheld mixer and frother. Each morning, I blend cacao and collagen powder into my coffee, and in the past, I always ended up with stubborn lumps using only a spoon or whisk. I had previously purchased a few inexpensive handheld mixers, but they disappointed me both in price and performance, struggling to mix the powders thoroughly—especially at the bottom of the cup. I came close to abandoning handheld mixers altogether, but decided to give it one last try.
After reading countless reviews and carefully comparing models, I opted to invest in a higher-end handheld mixer. The anticipation was high—would this mixer truly distinguish itself from the budget options cluttering my kitchen drawer? From the moment I unboxed it, the difference was clear. The mixer felt substantial in my hand, and the build quality reflected thoughtful engineering.
While this model cost roughly twice as much as the cheaper alternatives, it proved to be well worth the investment. Initially, I was concerned about the dial at the top, fearing it might be difficult to control. However, I was pleasantly surprised by its intuitive operation. The unit offers a solid feel, plenty of power, and a versatile range of speeds—from a gentle stir perfect for coffee to an impressively fast setting.
I had not previously considered using this mixer as a frother, but as a cappuccino enthusiast, I decided to give it a try. I heated both 2% milk and oat milk to take the chill off, then submerged the mixing wand. Allowing the mixer to rise above the milk introduced air and created a rich, creamy foam—an unbelievable result. My homemade cappuccino now tastes like something from a café.
The controls are robust, the construction is reliable, and the power is consistent. Cleanup is effortless, requiring only a quick rinse under the tap. The battery life is also noteworthy, lasting through several uses without losing strength.
If you are hesitant to spend a bit more on a quality handheld mixer, I wholeheartedly recommend making the investment. This mixer has become an essential part of my morning routine. Excellent product—well done!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 13, 2025
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