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I had a 13' Whaler when I was a kid. Had a 33hp late 60's Evinrude - ran 32mph. We bolted a 55 hp Evinrude on it and couldn't find a prop with enough pitch but pegged the Airguide speedo (it read 55mph). Was kind of a handfull. The 55hp motor belonged to a friend's dad and he never really gave us permission to use it. He sort of made it clear that we were not welcome to borrow the motor any more.
Shame.
We then had to resort to experimenting with my 33hp on a 9' Jon boat from Sears. Had to put the driver and the tank and the battery in the front. Drove from the very front seat with an extended tiller handle (whaler had cable steering but jonboat did not). Don't really know how fast it was (we used the same whaler prop) but it felt like 200.
We then put the 33 on a 16' Alumacraft square-stern canoe. At speed the center of the canoe lifted but the stern stayed buried in the water (too narrow at the stern). Had to run full negative trim (no power trim, just tilt pins). Put battery and tank and passenger in the nose. Long tiller put driver (me) in the center. We kept pouring on more power but stern kept trying to sink. I decided that we could power thru it and hammered it.
Center of hull rose and the nose stuck way up into the air at 25mph or so. Was extremely "tippy" and sensitive to steering (in a big way). Stern went under and was taking on tons of water. We got excited and knew we could not let off the throttle. We finally established an equilibrium where, at 25 mph or so, the water was self-bailing as fast as it was coming in. The motor cowl was parting the water at the front, but apparently it was getting enough air into it from the rear intake that it kept right on humming.
We ran like this all the way back to my cove and wide open down to behind my house. I chopped the throttle and we slowed and went down sternfirst like a rock. 4 feet of water, though.
Battery seemed a little weak after the submerging but the motor cleaned out fine and ran till I got rid of it a couple of years later.
Ah, Whaler stories...
I sold my old Whaler, but I have another just like it for my kids
(same vintage hull '72, but newer '78 Johnson 30hp).
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I see London, I see France...
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