70941A3 Water Pump Impeller Kit for Mercury for MerCruiser Force Outboards 2 Stroke 4-9.8 HP 46-70941A3 Sierra 18-3446

Replacement water pump for my 1998 Mariner 40hp outboard.

Worked great on my mercury two stroke4hp.

Water pump kit fits perfectly on my 200hp mercury outboard 2000 model. Excellent quality matching the OEM part I replaced from wear & tear. There where however extra gaskets & O-rings that go nowhere on my outboard

Good kit, two gaskets, a plate and the impeller, but the key provided was not the correct size. It was too thick to fit in the driveshaft and too thick to fit in the impeller.

As described

Good pump pressure again.

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.

Why did you pick this product vs others?: Fits my Model 39 Merc.

Très bon produit mai pas compatible avec mon moteur.

Good kit. All items are quality made. They fit perfectly, and even included the gaskets required for the upper and lower oil fill screws.

Description fitment is wrong. Product fit older Mercury 2 strokes up to 9.8hp. I noticed the mistake before buying and bought it to remplace the impeller on my 1977 7.5hp. Saved 20$ and it was a perfect replacement. Old Mer is back on the water!

I bought it as a spare kit when I needed it. all parts look good quality

Living in a rural area it's not always easy to find economical parts quickly.