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The GHmarine 70941A3 Water Pump Impeller Kit is a precision-engineered, direct replacement for Mercury Marine 4-9.8 HP outboard engines from 1975-1986. This comprehensive kit includes all necessary components—impeller, plate, seal, cover, housing, and key—crafted from durable metal and designed for easy installation. Trusted by boaters for reliable cooling performance, it ensures your engine stays protected and efficient on every voyage.
| ASIN | B07Q86CX47 |
| Automotive Fit Type | Vehicle Specific Fit |
| Best Sellers Rank | #129,758 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #6,969 in Boating Equipment |
| Brand | GHmarine |
| Brand Name | GHmarine |
| Compatible with Vehicle Type | Boat |
| Customer Reviews | 4.3 out of 5 stars 124 Reviews |
| Global Trade Identification Number | 00636946579227 |
| Included Components | Cover Assembly, Housing Assembly, Impeller, Impeller Plate, Key, Seal Water Pump Cover |
| Item Type Name | Water Pump Impeller Kit |
| Item Weight | 104 g |
| Manufacturer | GHmarine |
| Manufacturer Part Number | 46-70941A3 |
| Manufacturer Warranty Description | 30 Days |
| Material | Metal |
| Material Type | Metal |
| Model Number | 46-70941A3 46-46893A6 18-3446 |
| Number of Items | 1 |
| Number of Packs | 1 |
| OEM Equivalent Part Number | 12122, 18-3446, 46-46893A6, 46-70941A3 |
| UPC | 636946579227 |
| Unit Count | 1 Count |
| Vehicle Service Type | Boat |
| Weight Class | light |
T**N
Direct replacement for mercury 4hp
Worked great on my mercury two stroke4hp.
P**.
Works like a champ!
Fit my 1977 Mercury 110 nicely and works great. Such a squirter now 💦💦 Some instructions and or a cut sheet would've been helpful though.
I**E
This is not a drop in for 46-70941A3
I bought this kit to replace the waterpump on my 1985 Mercury 7.5. The waterpump kit is listed as 46-70941A3, so when I cross referenced this kit, I bought it. The kit comes with the top oil seal, which is less important because it is over the waterpump, and in theory shouldnt interact with the oil/water barrier. The important seal is the waterpump base seal that actually stops water from getting into the oil and vise versa. This does not come with the kit. When I realized it didn't, I looked up the parts for this. Marineengine lists two possible seals for this location. Luckily, we have a marine supply store locally that stocks these. I went in and bought both(authentic mercury parts). You are supposed to use a mandrel to press the oil seal into the base, but the dimensions are wrong and neither of the OEM parts work with this base. You can see in the photo the old waterpump base with seal inserted. The 2 new seals and new waterpump base are on the right, and they do not fit. The waterpump base is completely useless without the lower oil seal(unless you like water in your gear oil) so I'm not able to use it at all. Thankfully, my original base is still in somewhat working order. I will have to reuse it, but it makes the purchase of the waterpump basically a throwaway. I would encourage folks doing this repair to not make the mistake I made. Please don't be lured by the cheaper off brand, and purchase an OEM part.
M**T
Solved my overheating at idle problem.
Good kit, only complaint is I had to reuse one piece from my old water pump because the little rubber piece that connects to the pickup tube was way too small for the opening on the pump. Not sure why. Luckily the old one was still serviceable.
H**0
Not OEM specs, may not work, you are warned.
Save yourself the headache and buy OEM. Spent 3 days wrenching and over a hundred bucks in gaskets and parts because it would not pump water after this kit was installed. Lower unit pulled and inspected x12, after obtaining OEM impeller, replaced impeller and used original pump housing, as after examining this kit casing, it was not built to the same specs. Put back together and tested in tank with drill 1st, pumped wonderfully, installed lower unit and tested in barrel, works like it should. Would not recommend this kit.
G**N
Rubber Very Poor Quality
All the parts were great except the impeller. Rubber was cheap and wouldn’t pump water, took it out and there were two small tears on two if the fins and they seemed to stay disfigured when taken out. Had to purchase another impeller from different vendor and pumps fine now.
P**R
Impeller did not fit
GH marine contacted me providing a solution. I would buy from them again. It was simply a an out of round part they get 5 stars for service I believe the impeller was out of round. Used calipers to measure and it was a the correct size but would not slide over the shaft. Replacement ordered and measured. Slipped in place with no issues
R**L
cheap
cheap and housing seal in backwards
A**.
Parts fit
Living in a rural area it's not always easy to find economical parts quickly.
A**Z
Always make sure before ordering
It came on time and great product
W**N
Worked awesome
All the parts were there and everything fit perfect
C**S
High quality water pump kit, doesn't come with the water guide tube so that's a minus.
If they could add the water guide tube the sales will be higher.
H**.
Exc
Exc
Trustpilot
1 week ago
1 day ago