On Apr 9, 2:00*pm, wrote:
On Fri, 9 Apr 2010 09:44:36 -0700 (PDT), Jack
wrote:





On Apr 9, 9:41*am, Tim wrote:
This pontoon I just got has a v-4 evinrude with a power trim . Besides
using it to raise the lower end for transport, is a power trim really
of any effective use on a pontoon boat? especially of one of this size
and loaded down with people? *I mean it's gong to be a cruise
platform, not a rocket sled.

My old Bennington was a 25' tritoon with lifting strakes and a 150hp
Johnson. *The trim on it did make some difference... in a straight
line you could affect the speed and bow lift a bit. *However, when set
at the most efficient for running in a straight line, it would
ventilate the prop in anything over a gentle turn. *When skiing or
pulling a tube, I'd have to work the trim a lot.

The new Premier is also a 25' tritoon, but it has a different center
pontoon design. *With the Yamaha 250 on it, the trim has virtually no
effect on the bow lift or speed... it seems that it's planed out and
doing all it will do. *Nice thing is that it's hooked up solid with no
ventilation in the turns, and it'll turn nearly as sharp as a V hull.

With your boat's length and having two 'toons, I'd be surprised if you
see much of an effect with the trim, but I may be wrong. *Let us know
what it does.

Cavitating the prop in a turn is common with pontoons, particularly if
the motor is mounted high. You are *going through the wash of the
outside pontoon on a turn. Perhaps your 250 is heavy enough to hold
the stern down more. Is it a longer shaft or mounted lower?
My boat is horrible about blowing out on a hard turn at speed but I
gave that up for shallow running ability. My motor is 4" above the
stock location.- Hide quoted text -


I always thought it was because of the center pontoon being right in
front of the motor. With the old boat the dealer said it was normal,
and I had to expect to work the trim a bit.

With the new one and the 250, I wondered about the mounting height
myself, but taking a look at the foot as I'm underway it looks like
it's running about as deep as I understand it should. I think the
design of the center "PTX" toon and the way the boat turns, with the
rear squatting, banking, and lifting the outside toon out of the
water, it just has cleaner water and is "forced" to stay hooked up.
Watch the video I linked in a previous post and you'll see what I mean.