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Good morning, Seaboard Marine,
I have twin Cummins 6BTA 5.9 M3 engines. (B5.9 M330, Cummins 330 HP M10TA). Their build date is February 2004 and would have been installed into my boat (Alaska 45 sedan cruiser, semi displacement vessel, privately owned used as a pleasure vessel), when built in 2004/5. Their serial numbers are Port 46368002 and Starboard 46371833.
Current engine hours are approximately 2200 each.
In July 2018 I purchased two SMX-1730 raw water pumps to replace the factory original. (Spacer plates were also fitted at that time), These have been in use now for 5+ years and 1000 hours. The impellors have been routinely replaced as follows: July 2020 and 357 hours running time and 2 years
Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā November 2021 160 hours and 16 months
Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā December 2023 358 hours and 2 years
I also retained one of the original Sherwood pumps as a spare in case of emergency.
The old impellors were always in good condition such that some were retained as spares. When the impellors were last changed the cover plates were starting to show signs of some wear, not bad, but some wear. Currently neither pump show any external signs of wear or leakage.
Ā The boat is always in the water (except for itās annual lift out and anti-foul); itās salt water and temperature range from 21degrees to 26 degrees centigrade. Weāre located within Ā¼ mile of the South Pacific Ocean so good clean water. Rarely is there anything in the sea strainers.
The only access to the Port motorās raw water pump is to lie over the top of the engine. What a job!!! And always something Iām reluctant to tackle.
Iām now at the point of ānext time around when itās time to deal with your seawater pumpā; and Iāve asked āask yourself what you could do NOW in order to make the NEXT TIME you need to service your pump a lot easierā.
I intend to order: two FC-RKIT fuel cooler removal kits
Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā two GK-1730-KIT-SMX
Ā Ā and one GK-1730-KIT-SWD (thatās for my spare pump)
Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā plus 2 impellors SMX-Super 27
Iām seeking your advice as to from your experience what would be your expectation that my SMX pumps are nearly due for a major overhaul?Ā Should I be including two SMX Repair kits; SMX-REBKIT-17xx in my order?. On the one hand I donāt want to be buying the repair kits now if the expectation is that they wouldnāt be needed for another 2+ years. On the other, I donāt want to have the impellors etc. out of the existing pumps only to find that they are nearly due for a major overhaul.
Your recommendation is sought.
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SMX raw water pump longevity
FWIW, I replaced the Sherwood pump in my 37 Nordic Tug’s 6BT 5.9 M3 with an SMX, eight years and 5400 hours ago. With impeller replacements every year or two, it is still working perfectly.
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