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Author Topic:   1994 OUTRAGE 21 VIPER Propeller
WhalerNoobie posted 01-28-2015 11:39 PM ET (US)   Profile for WhalerNoobie   Send Email to WhalerNoobie  
I recently bought a 1994 OUTRAGE 21. I have yet to take her out due to some small repairs to be made first. She's about ready, and I will take her out in a few days. The outboard is a 1994 Evinrude 200-HP. The propeller is an aluminum 17-pitch. I have a new stainless steel VIPER propeller 14.75 x 19 with TBX hub. What kind of performance should I expect with the 200-HP propped right? And, can I seeing the 19-pitch fine?

I've also read that this block had a higher RPM band closer to 6,000-RPM. Is this true? And not 5,500-RPM?

tedious posted 01-29-2015 10:07 AM ET (US)     Profile for tedious  Send Email to tedious     
Noob, I can't speak to your performance specifically, but in general, going to a more modern, highly-cupped stainless steel propeller from an aluminum propeller with less cupping, you need to go down in pitch, not up. So, unless you were quite under-propped with the aluminum 17, you may find the engine can't swing the 19.

For classic two-strokes in particular, you don't want to lug them, as they depend greatly on the fuel-air flow for cooling. Best to have the WOT RPM right up at the top of the recommended WOT range.


jimh posted 01-29-2015 10:49 AM ET (US)     Profile for jimh  Send Email to jimh     
Regarding the optimum full-throttle engine speed for your engine: I tested many propellers on a similar Evinrude engine, a 1992 225-HP model. I think your engine is the same displacement and configuration, just rated at less horsepower. In all the testing, I only found one propeller that let the engine run at full-throttle with an engine speed much over 5,500-RPM. Most of the propellers I tested produced full-throttle engine speeds around 5,500-RPM, and the engine seemed quite happy with that. I have presented the results of some of the tests in a lengthy article, which you can find at a

and some further data at

After all that testing, I settled on a particular propeller that let the engine run around 5,500-RPM at full throttle with the usual load. That seemed to be a good engine speed range for the Evinrude.

I am not an Evinrude historian--there are some guys who are--but I have the impression that Evinrude has a history of making some model of their engines with different tuning, oriented more for speed, and with the notion the engine would be running in a higher engine speed band, as you suggest. Usually those engines got some sort of special designator on the cowling graphics, a special model name or some sort of distinguishing mark. If you have one of those top-tuned engines, it may be able to run at 6,000-RPM. If it does, it will be burning more fuel, of course.

The VIPER series of propellers was not among the ones I have tested. I believe they are intended for faster boats than mine. My top speed was just above 40-MPH. I have a feeling that with a 1994 OUTRAGE 21 and 200-HP, the top speed will be in a range of 40- to 45-MPH.

jimh posted 01-29-2015 11:02 AM ET (US)     Profile for jimh  Send Email to jimh     
Regarding the VIPER propeller: you may find this article

to be of interest regarding VIPER propeller testing. The VIPER appears to be available in pitch increments of just one-inch, which is somewhat unusual. The test results also surprised me with the fuel economy of the VIPER. It was just as good as the other propellers tested.

msirof2001 posted 01-29-2015 02:20 PM ET (US)     Profile for msirof2001  Send Email to msirof2001     
I have a 1995 21 Outrage. Recently repowered but for almost 20 years, had a Yamaha 2-stroke 200 carbureated (TXRT) with a Saltwater Series 19-pitch prop.

Same hull. 4000 RPM was 28 to 29-nautical-miles-per-hour [about 33-MPH--jimh].

Teak Oil posted 01-29-2015 04:14 PM ET (US)     Profile for Teak Oil  Send Email to Teak Oil     
Everyone is just guessing until you get baseline numbers of some sort. I run a 21-pitch Viper on my Outrage 22, and the performance is good, with good grip, good top speed and good cruise. You need to use a propeller so your engine will run around 5,800-RPM with a light load and no less than 5,500-RPM with a heavy load.

If you have a 2.6-liter small block 200-HP turning a 19-pitch propeller, [those targets] will be tough [to reach]. The 3.0-liter big block 200-HP may be able to swing the VIPER. If your outboard is mounted all the way down on the transom, in the top set of holes, you are losing a lot of performance. You should be mounted [described the mounting position by measuring down from the top hole--better to describe the mounting position in terms of how much higher than lowest the engine is mounted using increments of 0.75-inch or "one hole"--I think he meant "two-holes up"--jimh] to get the best performance.

jimh posted 01-29-2015 05:26 PM ET (US)     Profile for jimh  Send Email to jimh     
The best engine mounting height will be determined by the boat, the propeller, and the engine gear case characteristics, but, in any event, it is quite safe to say that mounting at least one-hole-up is a good starting point. Whether or not the engine, boat, and propeller will tolerate higher mounting is just "guessing until you get baseline numbers of some sort."

TEAK OIL does suggest an important question to ask you: do you have a 2.6-liter engine? Or a 3.0-liter engine?

OMCguru posted 01-29-2015 05:53 PM ET (US)     Profile for OMCguru  Send Email to OMCguru     
A 1994 Evinrude 200-HP is 3.0-liter loop-charged engine.
jimh posted 01-29-2015 09:44 PM ET (US)     Profile for jimh  Send Email to jimh     
From my 1991 factory service manual for "90-degree LOOP V MODELS 120 THRU 140, 185 THRU 225, 250, 300" the specifications for the 200 say:

Full Throttle Operating Range:
5,000 to 6,000 RPM

Minimum Test RPM:
200 STL -- 5,700
200 TX -- 5500

It sound like the "STL" model is a little hotter than the TX model. Which one do you have?

seahorse posted 01-30-2015 08:01 AM ET (US)     Profile for seahorse    
The 200 STL is a 20" shaft motor which would be called an HO today. It has the 225hp size carburetor venturis on it for extra top end performance.
jimh posted 01-30-2015 08:33 AM ET (US)     Profile for jimh  Send Email to jimh     
According the great OMC model number reference document at

in that epoch the model designator "ST" refers to "special styling, trim and tilt." It sounds like you get more than just fancier cowling ornaments.

WhalerNoobie posted 01-31-2015 01:53 PM ET (US)     Profile for WhalerNoobie  Send Email to WhalerNoobie     
Thanks guys,

Not sure the exact model number as the serial number tag is vanished. I can't get a model or serial number. Just that the boat and motor are orginal from 94.

WhalerNoobie posted 01-31-2015 09:27 PM ET (US)     Profile for WhalerNoobie  Send Email to WhalerNoobie     
Hey guys how do I know if I have the big block or not? It's a ocean pro model believed to be a 1994. These were 90 degree looper right?
WhalerNoobie posted 03-01-2015 01:04 PM ET (US)     Profile for WhalerNoobie  Send Email to WhalerNoobie     
Finally got everything working correctly on boat and took her out fishing yesterday. Fishing and weather we're poor but boat ran like a top. Wheel turned over 5600 rpms at 50 mph with 3 men and 60 gallons of fuel.

Thanks guys.

jimh posted 03-01-2015 01:34 PM ET (US)     Profile for jimh  Send Email to jimh     
Regarding the methods to determine if an Evinrude engine is the V6 90-degree 3.0-liter or the V6 60-degree 2.6-liter: there are many visual cues. The easiest one to recognize is the arrangement of the angle between the cylinder banks.
WhalerNoobie posted 03-02-2015 03:24 PM ET (US)     Profile for WhalerNoobie  Send Email to WhalerNoobie     
Thanks Jim. Sorry must of misread. I was under the impression their was a 90 degree 2.6 and a 90 degree 3.0

I know it's a 90 degree so it's the 3.0L

Thank you

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