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#1
01-11-2008, 12:18 AM
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Re: Repowered my Seafari w/ a 90 hp Optimax
The Pro-Pulse definitely has more sternlift, but my guesstimate so far puts effective slippage at the 16-18% range. This is of course more of an issue when accelerating.
The 90 Optimax is NOT lighter than the 115 6cyl, it is nearly 100lbs heavier. The 90 Opti is a 1.5 liter 3 cyl, and weighs in at 375 lbs in a 20" shaft. Contrast that with my 1991 150 Merc XR4 at 396 lbs. I plan on an extended run tomorrow to get some fuel figures. The Navman quit working after I moved the sender to the new motor. I gotta troubleshoot it. Tomorrow I'm just going to do a cruise RPM run on a 6 gal. portable, and see how long it takes to run out of fuel, then do the math. I don't have enough hours on the motor to run WOT for any length of time, so I'll wait until the fuel flow meter is working again.
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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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