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Author Topic:   Optimax 135 and Outrage 17
prm1177 posted 03-23-2003 12:55 AM ET (US)   Profile for prm1177   Send Email to prm1177  
Well, got the boat in the water, engine services et al. Have a question on whether I should be obsessing over speed.

At WOT, I get 5500 RPM and the GPS (Horizon CP150c and highly recommended) shows 35-36 knots (around 40 mph) with full tank and 1 person. Is this in the ballpark for this combo, or should I start the propeller game?

PSW posted 03-24-2003 10:14 AM ET (US)     Profile for PSW  Send Email to PSW     
If that is a Outrage II I would say that is slow. Brother in law has a 150 Optimax on his 99 Outrage and I have taken it out numerous times and seen just over 50 on the GPS no problem. It shows much faster on speedo but that is just the speedo catching air pockets. With 15 less hp on the same block I would assume you should go atleast 45 at WOT.


aubv posted 03-24-2003 10:33 AM ET (US)     Profile for aubv  Send Email to aubv     

Our '96 17' OR w/130HP Evinrude spinning a 14-1/2 x 19 Michigan SS prop tops out at 42.7mph (GPS)

bsmotril posted 03-24-2003 04:03 PM ET (US)     Profile for bsmotril  Send Email to bsmotril     
With a 17" prop and a reasonable amount of slip, you are in the ballpark. I think the ideal 100% efficiency speed for that combo is around 44 mph. The 150 has a different gear ratio in the bottom and is good for another 3-4 mph.
LiquidDiet posted 03-24-2003 09:38 PM ET (US)     Profile for LiquidDiet  Send Email to LiquidDiet     
my 1st 17' Outrage II with a 150hp Ocean Runner ran just over 50 (like 53 light load, my newest one with a 99 150 hp Optimax swinging a 19" Mirage plus on a jackplate does about the same. yet this combo needs the jackplate to get there due to more weight and equipment on my newest Outrage II, you should turn a solid 45mph with the 135 Opti.
prm1177 posted 03-25-2003 02:36 PM ET (US)     Profile for prm1177  Send Email to prm1177     
Thanks to everyone for your advice. The question now is which prop? The Mercury site prop selector suggests:

Laser II (3blade) 25 pitch
Tempest Plus (3 blade) 26 pitch
Trophy Plus (4 blade)26 pitch

The boat use is mainly bay cruising with occasional fishing and a leetle bit of water skiing (if I ever get it to a lake).

Hoss posted 03-26-2003 06:24 PM ET (US)     Profile for Hoss  Send Email to Hoss     
MY 96' Outrage with 150 Merc. Prop 19" Merc. Offshore 4 blade = 48 to 51mph. great holeshot and good grip on turns and rough water.
prm1177 posted 03-30-2003 02:13 PM ET (US)     Profile for prm1177  Send Email to prm1177     
Played with the trim yesterday (parts of SF Bay were calm enough to do this and still be able to focus on the GPS speed reading). Fully trimmed with 1 person and 3/4 tanks I registered a speed over gound of 45.8 mph with the stock prop. I think I will be ordering the Trophy Plus (4 blade)26 pitch since midrange performance and handling will be more important than top speed (I don't expect to be able to use WOT agian on SF Bay until 2005 :)
bsmotril posted 03-31-2003 01:24 PM ET (US)     Profile for bsmotril  Send Email to bsmotril     
26" is way too much pitch for that motor boat combination. Anything above 20-21 inches is going to be iffy. I can tell from your speed numbers and the Opti's rev limiter you are likley running a 19" prop now. You should be going the other direction and looking at a small bladed efficient 3 blade prop like a Stilleto in a similar pitch..
prm1177 posted 04-01-2003 12:41 PM ET (US)     Profile for prm1177  Send Email to prm1177     
I got the prop and pitch recommendations from the Mercury Prop Calulator at their web site. What gives? If I really need a smaller pitch, then the calculator is wildly innacurate.
bsmotril posted 04-01-2003 05:13 PM ET (US)     Profile for bsmotril  Send Email to bsmotril     
IF you had a 26" prop on now, and the motor pulled its' 5600 RPM redline, your top speed would be 62 mph with a reasonable 10% slip factor. A 135 Opti might pull 5600 rpm with a 26" pitch prop on a light tunnel hull hydro, but NOT a deep vee outrage. Find out what pitch prop you have, and use that as a starting reference do deviate from. But you'll find going more than +/- 4" will be counterproductive. If you want speed and run light, reduce blade area by decreased diameter and bow lift with more rake (Stilleto). If you run heavey and want midrange and load carrying, then the 4 blade is the way to go.
prm1177 posted 04-03-2003 11:10 PM ET (US)     Profile for prm1177  Send Email to prm1177     
My marina (also a Mercury Dealer) is offering me a good deal on a 14 in 19 pitch Mercury Vengeance SS 3 blade prop (25% 0ff). anyone used one of these on an Outrage 17/Optimax 135 Combo? Don't know much about this model.
Perry posted 04-03-2003 11:28 PM ET (US)     Profile for Perry  Send Email to Perry     
Ask him if you can take it for a test trial before you buy it.
prm1177 posted 04-05-2003 11:47 PM ET (US)     Profile for prm1177  Send Email to prm1177     
Revenge SS prop report:

On a calm SF Bay day, fully trimmed the combo of the Optimax 135 and the Mercury Revenge 14 x 19 pitch prop took the Outrage 17 (1 person with full fuel load) to 50.2 MPH SOG on the GPS and a Lowrance read water speed of 58 mph.

Good midrange handling and very quick to plane. It looks to be a keeper. Should the Lowrance X65 water speed be that much at variance?

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