mack boring re 3GM30/prop

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1

Posted by jackcarles (johncarles@…>)

the tech guy at mack says that the 3gm30 with the right prop will run
at 3600 rpm–which should be done for only 10 minutes/hour–and will
be at optimum running @3400rpm and should cruise at 2800-3000 rpm. the
right prop depends on trans model and gear ratio–and a good prop shop
he says

Hope this info is useful.

Jack

2

Posted by Larry Kraus (kracherlandl@…>)

Thanks for the info Jack. I need to put all this great response together
with some data from the tranny motor and prop this fall and see what
gives for next year.

Thank you,

Larry Kraus

jackcarles wrote:

the tech guy at mack says that the 3gm30 with the right prop will run
at 3600 rpm–which should be done for only 10 minutes/hour–and will
be at optimum running @3400rpm and should cruise at 2800-3000 rpm. the
right prop depends on trans model and gear ratio–and a good prop shop
he says

Hope this info is useful.

Jack