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SMX 1730 Cummins Seawater Pump

Direct Replacement on most early 6BTA & all B & C series Diamonds

SMX 1730 Seawater Pump for Cummins B & C Series Diamonds
  • Exclusive design for 100% "PLUG & PLAY" replacement on all Cummins B & C Diamonds
  • "Detroit Style" mechanical water seal w/ aft-mounted double lip oil-lubed "oil seal"
  • Made from proven seawater resistant alloys of bronze, brass & stainless steel
  • Simple rebuilds using commonly available tools, bearings & seals
  • Backed up by an exclusive 24 month "no hassle" pump exchange policy
This all started about 1988...
When Cummins released the (infamous to some) 6BTA 300, sometimes referred to as the CPL 970. About that time Sherwood and Cummins struck a deal that allowed Sherwood to become
the exclusive supplier of seawater pumps for them.

Catastrophic Spinning Wear Plate Failure
Catastrophic "Spinning Wear Plate" Failure
What I call "Design Defects" in the new Sherwood Pump that was installed on the new generation Cummins 300B marine engines (1700 series) became apparent soon after its release, and over the 16-17 years that followed, as Sherwood made different versions of this same "base pump," the number of design defects grew along with the new models. Now keep in mind, as we are not talking about seal and bearing wear/failures here, we are talking about real defects in design that I have never seen with any other seawater pump I have dealt with. By the time their most popular version was released, the 1730 (in about 1995), soon thereafter it was obvious that something had to be done to help solve this seawater pump failure dilemma that was now causing direct harm to my livelihood because this pump was being installed on the new Cummins Diamonds that were now the mainstay of my engine sales and repower part of my business.

As more years past and the flak I was getting about the quality of the Sherwood pumps grew, by early 2005, it was time to become proactive in developing a new pump that would "fit" as a 100% "plug & play" Sherwood 1730 replacement and try to do something that could make this pump more reliable... Our biggest challenge was working around the size constraints of the application as this new pump had to FIT exactly as the 1730 did or we could not market it successfully...

Exploded Sherwood Pump
Has this happened to your Factory/OEM Seawater Pump?
Because of this, we even had to compromise some on both bearing support and shaft size, which was where this pump needed much improvement. Solving the material choice was easy as all we had to do was not use the "junk" metal alloys, but go back to basics-Use proven seawater resistant alloys that have been used for decades by other prominent manufacturers of seawater pumps.

After some searching around, I found a respected company in Korea (already in the seawater pump business) that was willing to work with me in a new design. I had lots of ideas but absolutely no experience in trying to manufacture a seawater pump, and being a "small guy," had limited funding available for the development. What I did have was the knowledge of what can make a good seawater pump, a marketing plan, and also what we had to do to make the needed improvements. Well about 18 months of work with 100's of e-mails and drawings going back and forth, we came up with what is our SMX 1730 (& SMX 1727) seawater pump and now offer what we think is a superior "mouse trap". Our improvements speak for themselves and address all of the issues that are inherent with the Sherwood pump design. Cost ??-of course the new pump cost more than we hoped for, but with the cost of copper-based alloys tripling from early 2005 thru mid 2006, this did not help.. But in the end, we are still price competitive and now offer the end user a "choice" for the seawater pump used for the very popular Cummins 6BTA 5.9 and 6CTA 8.3 Diamond (and commercial counterparts) diesels.

Attention Australia & New Zealand Customers
We ship Down Under every week. Single unit shipment costs are usually somewhere between $230 to $250 via UPS Worldwide Expedited shipping. To determine exact shipping costs, add the products to your cart and go through the checkout process and enter your postal code.

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SMX Seawater Pump Pricing
Image Part Description Purchase
SMX 1730 Seawater Pump SMX 1730
"Plug & Play" replacement for the SHERWOOD 1730 - Fits All Cummins 6BTA's & 6CTA's, 270 / 330 / 370 / 255 / 350 / 450 / 480CE / & Diamonds (since about 1995), & QSL9

Cummins Part # 3866493 - Factory List $1,235.97

Factory direct pricing: $750 each or $1,450 per pair
* Includes spare impeller *


SMX Super 27 Impellers Purchase Impellers for the SMX 17XX Pumps
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SMX 1727 Seawater Pump SMX 1727 "Upside down" version used on late 400's, 420's

Factory direct pricing: $850 each or $1,650 per pair
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SMX 1716 Seawater Pump SMX 1716 Early 300/315/330 6BTA's (Nippon Denso Fuel pumps)
complete with Intake & Output "port kits"

Factory direct pricing: $950 each
Qty:

SMX 1722 Seawater Pump SMX 1722 Early 300/350/400's 6CTA's (Nippon Denso Fuel pumps)
complete with Intake & Output "port kits"

Factory direct pricing: $1,050 each
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Seawater Pump Elbow Kit COMPLETE ELBOW KIT
(EK-COMPKIT)
Seawater Pump Elbow Kit - includes (1) 115 degree x 1.75" outlet & (1) 2" x 45 swivel inlet unit with mounting flanges & bolts

Factory direct pricing: $200 each
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Seawater Pump Elbow Kit 115 DEGREE ELBOW KIT
(EK-115KIT)
Seawater Pump Elbow Kit - includes 115 degree x 1.75" outlet with mounting flanges & bolts

Factory direct pricing: $130 each
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Seawater Pump Elbow Kit 45 DEGREE ELBOW KIT
(EK-45KIT)
Seawater Pump Elbow Kit - 2" x 45 swivel inlet unit with mounting flanges & bolts

Factory direct pricing: $75 each
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All seawater pumps include Spare Impeller, Puller, O-Ring Kit, and Shipping/Handling to lower 48 States.

SMX 17XX Seawater Pump Impeller
Image Typical Pump Blade Count Diameter Length / Width Shaft Type Purchase
SMX Super 27 Seawater Pump Impeller SMX 17XX
SMX QSB
12 84mm
3 516"
73mm
2 78"
19mm
11T Course Spline
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Super 27 Seawater Pump Impeller fits all SMX Seawater Pumps

SMX 17XX Seawater Pump Repair Kit
SMX 1730 Seawater Pump Repair/Rebuild Kit SMX 1730 Seawater Pump Repair/Rebuild Kit