Cruise rpm in 912 motor

Hello Roger

I have a 2010 Kitfox with 912 ULS with a Sensenich ground adjustable prop  I bought last year and I have never really adjusted my prop before . I just returned from OSH and prior to my trip the prop was set at its lowest setting for short takeoffs . I changed the adjustment pin to #3 (0 being the lowest) . Static was around 4800 RPM and flat cruise was about 5200 with a good speed increase to over 110 MPH. This lower RPM concerned me about stressing the case so I dropped it one notch to #2 which increased the static over 5000 and max cruise to 5500+ . Would it be OK to run the #3 for long trip then change it back?

If 5500 is max normal operating rpm what is the correct cruise RPM ? Can I run it at max for long periods of time or should I run it a bit lower? On the same subject my green operating rpm goes down to about 4000 is alright to cruise around at 4000?

I appreciate your input.

Fred

Roger

If you have WOT at level flight set  to 5600 where is a good cruise RPM? Can you cruise at 5500 with out hurting the engine . I like 5200 or so. In the same subject is it ok to cruise at 4200?