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You should be very close.. I have a 2002 Waterman 18 "no floor" with a 60hp Merc 4 stroke and I'm burning 3 gallons per hour at 30mph at 4800 rpm. This is the sweet spot for my skiff and puts me right at 10mpg. I would think you'll be very cold to my numbers with the 70 yammi.
 

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I have an F70 on a 2013 Pro with NEMA network. I also tracked GPS miles for 1000 miles and tracked gas used to calculate. 7.5 to 9.5 mpg in reasonable running (25 to 31 mph) with SCD 3 15P. The long run tracking was 9.5 mpg but included idling and poling mileage. These figures are slightly better than the performance bulletin. I tried 6 different props, SCD is the one for my boat.
 

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I think that’s the semi clever (sc), my boat didn’t like it. Mine is the same diameter and pitch, but the NRS model. It has significantly better bow lift with the NRS.
What was d difference in performance on ur boat with scd vs nrs models? Only others i have tried was the red model n it was sub substandard, cavation massive.
 

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It’s been 9 years since I propped my boat. The way I remember it was I got way less bow lift than with the NRS. The scd was instantly on plane, but on plane performance was better by a lot with the NRS. I do see the Maverick and other HB pros running the scd. Try them both, kind of a pain to do, but it was instantly obvious that for some reason, the scd I tried was not going to work. Power tech dealer took it back, but shipping costs and time are a drag.
 
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