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Looking for help with Cummins 6CTA (8.3 liter medium duty diesel)
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--- Quote from: Skillet on February 14, 2026, 01:25:25 PM ---Final update on this saga-

The Cummins NW guys were great throughout this.  They sent a new flywheel and starter on their dime and offered to send techs to fix - but our commissioning schedule and their schedules didn't align. So we went ahead and split the engine and gear, and swapped the parts as soon as we could overnight. It was a thrash, but we got it done. Engine fired up and was running great by mid-morning.  Turns out the flywheel was some oddball unit that nobody is really sure how it ended up on the engine.

I was on one of the commissioning runs to test the whole system.  The run silent mode (electric only, no pumps running) is pretty impressive.  You can hear every pulse of the prop passing near the hull.  However, when fishing, the pumps will be running - and that hydraulic pump hum is the same.

There are definitely some bugs to work out in terms of programming and system logic. They're out doing a subsistence longline set for black cod today to test it all out while running gear. 

Overall, my experience with this has been that it's a fascinating project, but I still cannot see how the ROI could ever pencil in our applications.  I hope I'm proven wrong for my friend's sake.

Thanks for the help and interest in this, foks -

--- End quote ---

I'm pretty sure the flywheel on my 6BT is 159 tooth.  Can't recall the bell housing for sure, but I think SAE 2.   I knew it all back when I did the Suredrive.
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