Sierra 18-3426 Water Pump Kit With Housing
Price: $125.69
Save: $37.30
(22% Off $162.99)
Part # 18-3426
2nd Day Air for $2.99 More Eligible
This item is found in the following Product Families
Replaces OEM part #
  • YAMAHA 689-W0078-04-00
  • YAMAHA 689-W0078-A4-00

    (1) 18-3438 Impeller Plate
    (1) 18-3067 Impeller - replaces O.E.# 47-84797M, 689-44352-02-00
    (1) 18-3437 Insert Cup
    (1) 18-3244 Impeller Key - replaces O.E.# 664-44338-00
    (1) 18-2730 Upper Water Tube Seal - replaces O.E.# 664-44365-01
Average Customer Review for Sierra 18-3426 Water Pump Kit With Housing
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A Relatively Minor Gripe
by Arthur from San Diego, California on February 08, 2015
For my motor (30 HP Mariner, 1982) the bottom plate supplied with the kit had the intake slot about 1/2 the size of the one that I was using. Installed it anyways and, yep, 1/2 the intake = 1/2 the flow :( Old plate wasn't in bad shape so I used it to scribe the intake slot onto the new plate. Re-installed the old plate. I'll drill/Dremel out the slot in the new plate at my leisure and use it as a backup. Not a big deal - at the age of my motor I'll take what I can get. All the other components of the kit were top notch.
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Water pump 1985 Matiner outboard Staff confused cost me $17
by Daniel from Stillwater, Minnesota on July 21, 2014
Water pump 1985 Matiner outboard Staff confused cost me $17 in extra shipping and could of cost me a total of $72 + $17 = $89 more. If I did not receive and have both water pumps 18-3426 and 18-3427 to compare with each other and the original I would have spent $140 instead of $58. Everyone was saying the 18-3426 was the one for my outboard at $123 even after I said the serial # fits the discription of the 18-3427. So when I had the both here I found the 18-3427 match the original and sent back the 18-3426 for refund which cost me the extra $17 and time with your recomendation/advice. The 18-3427 works great. Note sure how you could justify the differnce in price with so little difference in product?????????????
(1 of 3 people found this review helpful)
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