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Author Topic:   Outrage 18 prop
Lou posted 04-08-2004 11:52 PM ET (US)   Profile for Lou   Send Email to Lou  

My 2004 Ficht is in and I will take my 82 in this weekend. Motor is 150HP.

Question is this: half of the topics and reccs are for a 14.5 X 19 and the rest seem to favor 14.75 X 19. The 150 is rated at 5250 rpm - so should be no need to spin the prop above this. I am leaning toward the 14.75 - and ideas/reccs would be appreciated. Also, ideas about mounting height on the transom would be appreciated.

Peter posted 04-09-2004 07:21 AM ET (US)     Profile for Peter  Send Email to Peter     
I wouldn't worry about the propeller diameter so long as it is greater than 14 inches. Let the prop manufacturer worry about that detail. The correct style of propeller with about a 19 inch pitch should selected. The Bombardier Viper or Raker are probably the ones you should be looking at if sticking with the house brand. Whatever propeller brand and type you go with, make sure your engine can turn 5250 RPM as you are normally loaded. I am told that making sure they run to the maximum of the RPM range is a key to success with these motors.

Motor mounting height is a matter of preference. I had my 150 mounted two holes up on my 18 Outrage for one season and although the boat was fast, I didn't care for the squirrely handling in rough conditions. I had it lowered to one hole up and left it at that (I think that works out to about an inch and a half space between the top of the transom and the motor bracket). The motor's anti-ventilation plate was about even with or just slightly higher than the keel as I recall.

Mumbo Jumbo posted 04-09-2004 08:31 PM ET (US)     Profile for Mumbo Jumbo  Send Email to Mumbo Jumbo     
If you plan to spend any time in the ocean, you need to consider a 17" prop. All this "top end" business is of no moment when you have to run in a short 4 or 5 foot following sea for four or five miles. You want to be on the cusp of the torque curve.
Sal DiMercurio posted 04-09-2004 11:50 PM ET (US)     Profile for Sal DiMercurio  Send Email to Sal DiMercurio     
You don't say what model or size boat that 1982 - 150 is on , I assume your getting rid of it & installing the Evinrude FICHT 150.
I don't think the maximum rpm rating is 5250 if it's a Johnson or Evinrude or Merc, I think it's like 5500 or 5600 max & thats where you need to prop her.
You really need to give us more info, because you might be putting that engine on an Aircraft carrier.
Just make sure you mount that engine at least up on the second set of holes.
As far as the diameter,....the bigger the boat, the more diameter & less pitch you need, just the opposite if smaller.
If your putting that engine on an 18 outrage, no need at all for all that diameter, a 14.25 dia will be more than enough.
Perry posted 04-10-2004 04:08 AM ET (US)     Profile for Perry  Send Email to Perry     
Sal, the topic of the post is: Outrage 18 prop.
Lou posted 04-11-2004 02:37 PM ET (US)     Profile for Lou  Send Email to Lou     

I very much appreciate the input from everyone.

It is a 1982, Outrage 18.

If you go to Evinrudes website then you see the HP rating per RPM that the 135/150/175 generates (all the same motor/displacement - I guess that the injectors, etc. are smaller).

Propshaft HP
135 HP (107 kw)@ 5000 RPM
150 HP (112 kw)@ 5000 RPM
175 HP (131 kw)@ 5500 RPM

The most common prop chosen for a 150 on an Outrage is 14.5 X 19 (from searches I've done on this site). The reason for this choice is that it lets the motor rev. to the 5500 range - which is usually the appropriate range. It seems that having this motor rev that high is not producing more HP, etc.

Hell, maybe I am over-analyzing it too much. Anyway - I do appreciate the input.


gf posted 04-12-2004 02:50 PM ET (US)     Profile for gf  Send Email to gf     

Maximum RPM on the Evinrude 150 is 5250.

You didn't mention which model of Bombardier prop you are considering, however, I would go with the 14-3/4" x 19" Viper.

Sal DiMercurio posted 04-12-2004 08:02 PM ET (US)     Profile for Sal DiMercurio  Send Email to Sal DiMercurio     
I don't have the 2004 catalog on the 150 FICHT, but I really doubt the maximum rpms for that 150 is 5250.
For some reason I'm leaning towards 5500 or 5800.
My 2000 ...200 FICHT is 5800 & the over rev shuts her down at 6200.
Sal DiMercurio posted 04-12-2004 08:08 PM ET (US)     Profile for Sal DiMercurio  Send Email to Sal DiMercurio     
Don't forget those engines usually run 10% higher in hp than what it says.
Yes, it will produce 150 hp at 5000 rpms but will put out 165 hp at 55 or 5800.
All engines rev higher than what the book says it produces it's posted hp at.
Mine puts out 222 hp at 5800, yet it says 200 hp at either 5000 or 5500 rpms.
gf posted 04-12-2004 08:27 PM ET (US)     Profile for gf  Send Email to gf     

Sal, it's right here:

Sal DiMercurio posted 04-13-2004 12:18 AM ET (US)     Profile for Sal DiMercurio  Send Email to Sal DiMercurio     
It sure is.
Funny the 175 is rated 500 rpms higher @ 5750 & it's the same power head.

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