Qsm11m

[Bou Ndaw]

I just read ”
Propping the Cummins Marine QSM 11 to Prevent Exhaust Issues
”
To adjust the pitch to stay in the right
GPH/RPM ratio, what must I do, choose the right propeller?
Thank you
Kind regards
Christophe

Topic

[Steve Lewis]

Give this thread a read

https://www.sbmar.com/community/topic/qsm11-engine-inspection-for-purchase/

The net of it all……..

Have a prop shop reduce the pitch of the props to meet the spec OR yes you may need new props if you need to modify the existing props too much.

The attached document is a procedural of how to create a plot of your own setup. You take that data, and your props, to a prop shop that can do the work and have a discussion with them about how you want to get the fuel burn at Cruise RPM down to spec.

[Author]

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