Moderated Discussion Areas
ContinuousWave: Whaler Performance
Buying new prop-Any feedback
|Author||Topic: Buying new prop-Any feedback|
posted 01-13-2003 02:39 AM ET (US)
The boat show is comming and I would like to pick up a second prop. I have a 88 18ft Outrage with a 88 Johnson 150. I am running an 18 pitch OMC raker stainless. Hole shot seems good, top end about 43 at about 4500 rpms. I have never tried anything however else so I don't have any comparisons. I am at 4000ft (altitude) so top speed may be slower than at sea level. I would like a spare prop , any feedback on other brands of props that match up with this era of Outrage and 150 Johnson would be appreciated.
Thanks very much for any feedback
posted 01-13-2003 09:33 AM ET (US)
Those props are everywhere. Get one on E-Bay and try a 17". For that it would be a 15x17" for any V6 OMC. Nice ones on E-Bay are under $200. 4500 is too low for WOT. You should be in the mid 5k's. Has it always run that low? Are you sure the prop is marked right(could have been modified)?
posted 01-16-2003 12:28 AM ET (US)
Thanks Bigshot for the feedback. The 18 pitch raker came on the boat out of Arizona. It was used on Lake Mead which is considered a lower altitude lake. OMC rakers are labeled oddly. Their 18 is compariable to a 19 pitch, I believe, of anyone else. It is a cupped, bow lifting prop by design. Up here I probably need a 17 pitch to get my RPMs up in the 5000 range.
Bigshot, I believe I saw a post you made where you mentioned you had an 18 outrage. What prop and pitch did you have on yours and were you running at sea level?
Also Would you know what max RPM is on a late 80s carb Johnson 150?
posted 01-16-2003 12:42 AM ET (US)
I have a 1985 150 HP Evinrude and the book says the "Full Throttle Operating Range is from 4500 to 5500 RPM".
posted 01-16-2003 09:38 AM ET (US)
posted 01-16-2003 10:08 AM ET (US)
I've got two 1988 Johnson 150s on my 22-Outrage. According to the 1987 OMC Supplement the Full Throttle Operating Range is 4500 to 5500 RPM. Horsepower is 150 at 5000 RPM.
I prefer to be at the top end of the RPM range even if it means I lose a little speed. I would check your compression, throttle linkage, and engine mounting height before looking at props. The height is key especially with a Raker which is "a great prop in surfacing conditions". If all that checks out then I would consider dropping down to a 15" x 17".
As Bigshot mentioned eBay is a great place to pick up props. A used SST 15x17 is very good condition went for $60 several days ago.
posted 01-16-2003 12:19 PM ET (US)
I will hold off on a new prop at the boat show and look for a 17 on line. When spring breaks I will also start checking out compression, ignition etc. The boat came out of storage when I bought it a year ago in Arizona from a retired Air Force gentlemen and it came with "assummed low hours" but I will check it out more throughly
Purchase our Licensed Version- which adds many more features!
© Infopop Corporation (formerly Madrona Park, Inc.), 1998 - 2000.