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#4
05-11-2015, 06:42 PM
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I used to rig the 20' hulls with JohnnyRude 85 hp V4's. They were adequate power. I'm not knowledgeable about the Yamadog 70's. They're the same block as the F60 & F50 motors at about 260 lbs. My concern would be the rather small alternator output of only 17 amps, compared to 81 amps on the ETEC, and 35 or 60 on the Mercury, Zuke, or Tohatsu.
Personally, I'd like to repower with the 2.0L Mercury Diesel 150 VGT with AlphaOne. It's only 6 lbs heavier than my current 3.0L with the old MR-1 drive. Fuel economy in testing down-under with a 800 kg 19' cuddy-runabout produced an astonishing best of 7.4 NMPG at 28 kts. That's nautical miles per gallon! 8.5 statute miles per gallon at 32 mph! The same boat achieved 4.2 NMPG at 36 kts WOT. Drool.
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Common Sense is learning from your mistakes. Wisdom is learning from the other guy's mistakes. Fr. Frank says: Jesus liked fishing, too. He even walked on water to get to the boat! Currently without a SeaCraft  (2) Pompano 12' fishing kayaks '73 Cobia 18' prototype "Casting Skiff", 70hp Mercury 
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