Verado ECM reflash/Mercury ECO Enertia Prop
We recently upgraded our Verado 250's with Simon Motorsports ECM reflash (Whipple Superchargers has a similar program) and changed out our Revolution 14 5/8" x 21" pitch 4-blade props for Mercury's new larger ECO Enertial 16" x 23" 3-blade props (Note: Generally Mercury recommends keeping the same pitch with the change out but with the horsepower increase wwe needed to move up a pitch to prevent red lining.)
Unfortunately didn't test each mod separately, but like others, seeing a large performance and economy improvement on our Protector 9M. Depending on octane see a 25-35% increase in power running 91/93 octane. Best cruise is 15% higher and fuel economy up 10% at that increased speed. Suprisingly, for a penality of 1/10 of a mpg less from our old best fuel economy our cruise speed increases from 34 mph to 46 mph, an almost 35% gain in speed. We will easily see return on our investment within a year based on fuel savings and about a $2000/yr savings each year thereafter with the modifications based on current usage. More remarkable were the changes in handling with the new props. Feels like a cat in the turns and runs much flatter which is a major plus with a heavy ended RIB. As the saying goes, "your results may vary" depending on your application, but we are extremely pleased with the improvements in speed, economy and handlling.