[yeungmicah]

Hi there, so been trying to research the question of if somebody was to recalibrate from 330 HP to 370 HP for what ever reason. <br />I’ve bought the Cummins marine CPL1975 /2208 Manuel from SBMar (thank you guys) and started to compile a list of parts and jobs to complete the conversion??

it seems like this is a common question but no one out there gives a straight answer  

so can the SBMar experts please come to the rescue on this?

 

[yeungmicah]

Brilliant. Thanks tony.
You’re the oracle and legend!!!

[yeungmicah]

HI Tony
Thank you for the reply. Very useful.
I will go ahead and purchase the adapters under the operating guidance provided.
FYI yes the boat was propped to make the max RPMs.

Thank you
Micah

[yeungmicah]

Tony,
Can you let me know about point 2 and if I don’t change the props can I keep using the BW72c with the SB couplers?
Thanks

Tony Athens wrote:

#1—————- There is no such rating for a 6BTA 5.9…..It’s 355HP at a minimum rated RPM of 3000.. Propping should be for 355BHP at 3150 RPM if you expect good life.. The fuel spec is “build the fuel system to” is CPL2208 or CPL8457…………..

#2————Your BW V-drives will not even come close to holding up unless you prop to about 250 BHP at 3100 RPM.

#3————Were your 8.2’s RT & LH as to rotation?, or CCW (LH) for both.. The Cummins are CCW (LH) .. That’s another potential issue..

Tony

[yeungmicah]

Great. Thank you.
1. Thanks for the clarification
2. Can I clarify!!!! I’m using the same props so from reading the forums of engine life and props move boats (and this load the engine and in turn gearbox) engines just turn them. Does this mean that the engines will effectively be under proped and thus the gearboxes won’t be over stressed?
3. DD 8.2s are both CCW rotation as you look at the flywheel.

Thanks

[yeungmicah]

Great. Thank you.
1. Thanks for the clarification
2. Can I clarify!!!! I’m using the same props so from reading the forums of engine life and props move boats (and this load the engine and in turn gearbox) engines just turn them. Does this mean that the engines will effectively be under proped and thus the gearboxes won’t be over stressed?
3. DD 8.2s are both CCW rotation as you look at the flywheel.

Thanks

[Author]

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