Re: P19 Outboard Mount Height?

Mac Davis (
Tue, 17 Aug 1999 10:02:08 -0400

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West Wight Potter Website at URL
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Hi Judy:
You may be asking too much of the stock Fulton mount. My long shaft
Evinrude 6 does a good job of going deep enough for the 2-4 seas routine in
the Gulf, but won't raise high enough to clear the water completely because
the powerhead hits the transom as the motor rotates to the lock position
with the mount up. Turning the motor sideways helps enough so that only
the tip of one blade drags. To check if this situation applies to you,
mount the motor on a stand and measure the fore and aft travel as the motor
lifts/rotates. I had the same problem with an earlier trailerboat (Chrysler
22) and fixed it by putting a 2 " block between the mount and the transom as
a spacer, as well as drilling new holes in the parallel arms of the mount to
extend the motor farther aft. As with many of my modifications, effective
but somewhat cosmetically challenged. I have not done this with Kelpie as I
don't intend to keep the Evinrude as the powerplant. It's overkill for my
motoring needs, achieving hull speed at less than half throttle, and heavy
to boot.

The distance from the inside top of the mounting bracket on the motor to the
cavitation plate is the critical vertical dimension. The top of the Fulton
mounting pad is the same elevation as the inside top of the motor mounting
bracket. At the low position, the distance from the top of the Fulton mount
to the waterline should be at least 6 inches less than the critical
dimension. This should put the cavitation plate 6 inches under water with
the mount full down. If the range is 14 inches, the cavitation plate would
be 8 inches above the water line in the full up position, and the tip of the
motor skeg just barely in the water. You can drill 2 holes based on these
measurements, mount the mount and motor, and check things. The multiple
holes in the mount will then allow a couple of inches adjustment either way
while still using the original holes. When exactly as you want it, drill
additional holes, install backing plate and voila.
Hope this helps,
Mac Davis, Kelpie, WWP19#804, Aripeka, Fl
----- Original Message -----
From: <>
To: <>
Sent: Monday, August 16, 1999 8:06 PM
Subject: P19 Outboard Mount Height?

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West Wight Potter Website at URL
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HI gang,

I've got a day or two to get the new-used outboard mount on the transom of
my P19. It's the same spring loaded mount, made by Fulton, that IM puts on
the new P19's.

I'll be putting a Nissan 5 hp long shaft on the bracket. I believe the
travel on the bracket is 14 vertical inches.

I want to make sure that it's in the middle position for normal sailing,
lower-than normal for heavy seas conditions (prop should be a little deeper
than normal) and prop out-of the-water clearance in the raised/stored

Can someone tell me how far below the transom I should put it so that it
works in all the positions? It will be really hard for me to wrestle with
the bracket and OB motor to check the alignment in the up, normal, and deep
prop positions. The measurement from the top of the uppermost bolt to the
transom would be much apprecitated.