Saw the dialogue about ETEC and torque curves. A longer story I’ll keep short. I have a 2012 ETEC 150 HO on a ’76 20’ Seafari originally purchased for trolling and skiing, but currently used only for watersports in SC. The ETEC is quick starting and quiet. However, due to its steep torque curve (between 2500 – 3500 rpm if I recall correctly) the speed instability was terrible particularly wakeboarding where my desired 17.5 mph might vary from 14 – 26 driving both the driver and rider nuts! Slalom and barefooting speeds were easier to hold steady. Engine height adjustments and prop changes did little to help wakeboarding.
Using a high five prop and a PerfectPass speed control I can now wakeboard at about 18 +/- 0.6 mph and pull an aggressive 220 lb wakeboarder at 22 +/-1.0 mph. PerfectPass is designed & manufactured for high end and competition ski boats; but, they do not make an outboard model. I engineered a method to mount and use PerfectPass on the ETEC which is a vast improvement over initial operation!
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Originally Posted by DoozleD
Terry, you are so right about the diff in the torque curve, we have a few boats with 90's on them and they doent seam to have a "sweet" spot...I know about the cover deal, they have a service bulletin about it..(add silicone) hahahaha!! ...thanks for the prop info
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