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Old 10-10-2011, 12:15   #16
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RaySea Lady's Avatar

Join Date: Oct 2009
Location: Windsor, ontario, Canada -Cape Coral, Florida
Boat: Bluewater 5800, Novatec 52
Posts: 191
Images: 5
Re: Cummins Diesel Twin 500hp QSC8.3 Permanent Slow Speed

You may want to check with cummins directly with your engine serial numbers.

I have twin 2001, 450hp turbo cummins on my 58 Bluewater, and when I asked cummins a few years ago about running at low rpm, they checked my serial numbers and told me there was no problem as my engines were equiped with a unit (forget what it's called) that would simply not allow the thermostat to open until the oil had reached its required temperature to insure best lubrication. Consequently, my diesels, once warmed up, run at around 175 pretty consistently at 1100 or 2200 rpm's

Ray Sea Lady, 2001, 58 Bluewater, while in the Great Lakes (Fully updated 2012/13).
Ray of Sunshine, 2008, 52 Novatec Classic Sedan while in Florida (Fully updated 2016).
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