RVPilot
Member
Hi Folks ... LOVE to get some feedback!!
We are new owners of a 1999 270 Sundancer, running a re-powered 7.4 with 115 hours on her clock. Todays outing was with full fuel, full water, 2 adults, and one English Cocker Spaniel ;=}
Perfectly clear winter day in Portland, Oregon, 50 degrees ... 10 kts wind from the west with light wind chop and some 1-2 foot wind waves. We are out on the Columbia River for our 6th cruise since bringing her to Oregon.
I've found that to get on plane, I have to accelerate at 3500 rpm, then the bow drops once on plane, and we throttle back to 3200 which seems to be comfortable. About 27-28 MPH.
I've read that to be more efficient through the water we could be trimming the outdrive UP to the 1/4 mark, so we did that today, and two things happened ... (1) the PRMs increased to 3450 from 3200, and (2) the bow rose slightly. Speed seemed to NOT change.
So are we configuring to be on plane correctly?
What effect does trimming the outdrive up provide on efficiency and performance? Other than the 200-250 RPM increase, we didn't notice anything demonstrative.
Love to get tips, pointers, and feedback!
Thanks ...
We are new owners of a 1999 270 Sundancer, running a re-powered 7.4 with 115 hours on her clock. Todays outing was with full fuel, full water, 2 adults, and one English Cocker Spaniel ;=}
Perfectly clear winter day in Portland, Oregon, 50 degrees ... 10 kts wind from the west with light wind chop and some 1-2 foot wind waves. We are out on the Columbia River for our 6th cruise since bringing her to Oregon.
I've found that to get on plane, I have to accelerate at 3500 rpm, then the bow drops once on plane, and we throttle back to 3200 which seems to be comfortable. About 27-28 MPH.
I've read that to be more efficient through the water we could be trimming the outdrive UP to the 1/4 mark, so we did that today, and two things happened ... (1) the PRMs increased to 3450 from 3200, and (2) the bow rose slightly. Speed seemed to NOT change.
So are we configuring to be on plane correctly?
What effect does trimming the outdrive up provide on efficiency and performance? Other than the 200-250 RPM increase, we didn't notice anything demonstrative.
Love to get tips, pointers, and feedback!
Thanks ...