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Author Topic:   1988 OUTRAGE 18, Yamaha F150

RobertRibley posted 10-13-2010 12:11 PM ET (US)
I just re-powered our 1988 Outrage 18 with a Yamaha F150 four-cycle engine. [Give me] propeller recommendations from Whalers with the same set up. It seems like many run the Stiletto 14.25 x 17. I would like to know if there are other propellers that are working well on this set up. The propeller that came with the motor is a Yamaha 19 M which seems to be too tall. Maximum engine speed is 5,000-RPM at 43-MPH. [Acceleration from a standing start] seems like it could be better with less pitch.
Thanks for any recommendations,
Robert
Tom W Clark posted 10-13-2010 12:18 PM ET (US)
For saltwater, sea level use, the 14-1/4" x 17" Stiletto Advantage would be a good choice. For use at elevation in freshwater and maybe pulling waterskiers, I recommend the 14-1/4" x 15" Stiletto Advantage. Why not try the propeller you already have?
Tom W Clark posted 10-13-2010 12:20 PM ET (US)
Also see:
http://continuouswave.com/ubb/Forum4/HTML/004317.html
RobertRibley posted 10-14-2010 12:53 AM ET (US)
Tom--That would be great. I was under the impression that I needed to get a new propeller for the Yamaha. It would be great if I can get the parts to make it work on the F150. The Stiletto has worked great for pulling skiers. The front and back pieces of the M 19 off of our new-to-us Yamaha propeller do not match up with the Stiletto.
Also, Tom, on engine height, if the Stiletto can be make to work, should I go 1-1/2-inch above the keel to the bottom of the cavitation plate? This used motor I got was a 20-inch shaft and I converted it to a 25-inch shaft. Right now I am using the second hole up on the engine mounting height.
Thanks for the advice as always,
Robert
Tom W Clark posted 10-14-2010 12:17 PM ET (US)
You need a different thrust washer and maybe spacer washer but the splines will work on the Yamaha.
If the propeller tests show it is a good fit, you can then have a new press-in rubber hub installed for a Yamaha motor.
The other alternative is to buy a new Stiletto Advantage with the square bore than can use whatever hub kit you want.
face posted 10-14-2010 04:36 PM ET (US)
Read my current thread on engine mounting height on the outrage 18:
http://continuouswave.com/ubb/Forum4/HTML/007357.html
My Outrage 18 with 150 hp handles way better mounted 3 holes up. I can now use the motor trim without causing the boat to porpoise. I suspect the impact will be even greater for you considering your four-stroke engine is heavier than my old-school two-stroke.
The Turbo (similar to stiletto advantage II) 19" pitch prop I bought is too much prop. I'll be going to a 17".
The 17 is on backorder right now, please post max rpm results if you get one.
RobertRibley posted 10-14-2010 11:43 PM ET (US)
I ran the OMC three holes up with the 15 Stiletto on tight turns or pulling a skier and sometimes it would blow out.
Tom, we machined a spacer for the 15 though now we don't have enough threads for the prop nut. We are going to press out the hub and see if we can machine down the surface where the nut and washer go to allow more threads. Are the Yamaha hubs for the Yamaha application readily available?
Robert

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Author	Topic: 1988 OUTRAGE 18, Yamaha F150
RobertRibley	posted 10-13-2010 12:11 PM ET (US) I just re-powered our 1988 Outrage 18 with a Yamaha F150 four-cycle engine. [Give me] propeller recommendations from Whalers with the same set up. It seems like many run the Stiletto 14.25 x 17. I would like to know if there are other propellers that are working well on this set up. The propeller that came with the motor is a Yamaha 19 M which seems to be too tall. Maximum engine speed is 5,000-RPM at 43-MPH. [Acceleration from a standing start] seems like it could be better with less pitch. Thanks for any recommendations, Robert
Tom W Clark	posted 10-13-2010 12:18 PM ET (US) For saltwater, sea level use, the 14-1/4" x 17" Stiletto Advantage would be a good choice. For use at elevation in freshwater and maybe pulling waterskiers, I recommend the 14-1/4" x 15" Stiletto Advantage. Why not try the propeller you already have?
Tom W Clark	posted 10-13-2010 12:20 PM ET (US) Also see: http://continuouswave.com/ubb/Forum4/HTML/004317.html
RobertRibley	posted 10-14-2010 12:53 AM ET (US) Tom--That would be great. I was under the impression that I needed to get a new propeller for the Yamaha. It would be great if I can get the parts to make it work on the F150. The Stiletto has worked great for pulling skiers. The front and back pieces of the M 19 off of our new-to-us Yamaha propeller do not match up with the Stiletto. Also, Tom, on engine height, if the Stiletto can be make to work, should I go 1-1/2-inch above the keel to the bottom of the cavitation plate? This used motor I got was a 20-inch shaft and I converted it to a 25-inch shaft. Right now I am using the second hole up on the engine mounting height. Thanks for the advice as always, Robert
Tom W Clark	posted 10-14-2010 12:17 PM ET (US) You need a different thrust washer and maybe spacer washer but the splines will work on the Yamaha. If the propeller tests show it is a good fit, you can then have a new press-in rubber hub installed for a Yamaha motor. The other alternative is to buy a new Stiletto Advantage with the square bore than can use whatever hub kit you want.
face	posted 10-14-2010 04:36 PM ET (US) Read my current thread on engine mounting height on the outrage 18: http://continuouswave.com/ubb/Forum4/HTML/007357.html My Outrage 18 with 150 hp handles way better mounted 3 holes up. I can now use the motor trim without causing the boat to porpoise. I suspect the impact will be even greater for you considering your four-stroke engine is heavier than my old-school two-stroke. The Turbo (similar to stiletto advantage II) 19" pitch prop I bought is too much prop. I'll be going to a 17". The 17 is on backorder right now, please post max rpm results if you get one.
RobertRibley	posted 10-14-2010 11:43 PM ET (US) I ran the OMC three holes up with the 15 Stiletto on tight turns or pulling a skier and sometimes it would blow out. Tom, we machined a spacer for the 15 though now we don't have enough threads for the prop nut. We are going to press out the hub and see if we can machine down the surface where the nut and washer go to allow more threads. Are the Yamaha hubs for the Yamaha application readily available? Robert