Repowered my Seafari w/ a 90 hp Optimax

[Fr. Frank]

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.