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ContinuousWave: Whaler Performance
Prop for 2000 18' Outrage
|Author||Topic: Prop for 2000 18' Outrage|
posted 12-29-2003 01:44 PM ET (US)
I have a 150 Opti that at WOT I'm turning 5200 and getting 40mph out of the boat on the GPS. The prop is a 3 blade 17" Mirage.
The aformentioned speed is with the motor fully trimmed out and one of my tabs down 7 degrees.
What do you think...seems like I should be making a few more RPMs and in turn getting a little more top end. At the same time I don't want to sacrifice too much low end punch in that we do pull water toys etc..
posted 01-02-2004 11:34 PM ET (US)
That engine is rated for 5,600 rpms, so a 15 pitch will allow the engine to reach right at 5,600 rpms, plus give you plenty of power out of the hole, plus you should gain a few more top end mph.
It also sounds like that engine is mounted to low on the transom.
Which set of holes is it mounted on ?....my guess is, all the way down or set in the top holes,....should be up on the 3rd set of holes which will also give you about 2...300 more rpms.
Before you get a 15 pitch prop, raise her up & I think you will see a world of difference in your performance.
posted 01-02-2004 11:42 PM ET (US)
Thanks Sal...I'll try that
posted 01-02-2004 11:43 PM ET (US)
Forgot to add...why is your tip off to the engine height...is it my trim tab angle or??
posted 01-03-2004 12:52 PM ET (US)
Cole, far to many people think they can cure the boat leaping around like a frog by using trim tabs.
First find out why it's do it & cure it by adjusting the engine height.
When you force [ plates ] the hull to ride smooth, your loosing alot of speed & getting a rough ride because those plates don't allow for the hull to land soft after taking waves head/on.
If your engine is mounted high enough, the hull rides on a far less wetted surface & runs much easier & comes off the waves much softer then being forced down by plates.
The bow hits a waves & it's soft compared to plowing right through it.
You can't believe the difference in the ride & performance of the hull by just raising the engine 1 set of holes.
Makes like a whole different boat.
Also, a performance prop will also change the way the boat runs & handles.
The stock aluminum props just propell the boat but don't lift the hull as it needs to be lifted,....big, big difference in performance.
posted 01-06-2004 02:51 AM ET (US)
Thanks Sal...to clarify I leave one of the tabs "up" and only use one side while under way to adjust for a list that I start to get above 30mph. I've always attributed the list to prop torque...other than that she rides like a dream
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