| Author |
Message |
    
Bill Smith
Advanced Member
Username: ko4nrbs
Post Number: 190
Registered: 06-2006
| | Posted on Wednesday, July 29, 2009 - 06:51 am: | 
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The motor is a 150HP Serial Number OG724006 Model 199815OL. It has a Trophy 24 pitch prop on it #48825940A45 (Stainless Steel 4 blade). The boat is a 19 foot Biper Fish & Ski. It's hard to get it up on plane with more than two people in the boat. I bought it used. Should I be using a different prop?
Bill |
Fastjeff
Senior Member
Username: fastjeff
Post Number: 6383
Registered: 09-2003
| | Posted on Wednesday, July 29, 2009 - 08:46 am: |
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What does it turn for rpms at full speed?
Jeff |
Bill Smith
Advanced Member
Username: ko4nrbs
Post Number: 191
Registered: 06-2006
| | Posted on Wednesday, July 29, 2009 - 10:06 am: |
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About 5600 rpms.
Bill |
Fastjeff
Senior Member
Username: fastjeff
Post Number: 6385
Registered: 09-2003
| | Posted on Wednesday, July 29, 2009 - 11:03 am: |
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That's about right. You might have to live with it.
Jeff |
Joe Kilpatrick
Member
Username: jlkilpatrick
Post Number: 5
Registered: 08-2009
| | Posted on Wednesday, August 12, 2009 - 10:46 pm: |
|
You can can tinker with different prop setup and spend a lot of money or you can go to http://dansdiscountprop.com and run the prop wizard. Your RPM is showing your in about the right range however a 4 blade prop is a different beast .Use the wizard and fill in all the boxes and hav it calculate your best choice speed or power. I buy and fix boats all the time and have never gone wrong with the computers choice it takes in all factors like fuel additional weight type of hull and number of passengars. Good Luck |
Joe Kilpatrick
Member
Username: jlkilpatrick
Post Number: 6
Registered: 08-2009
| | Posted on Wednesday, August 12, 2009 - 10:47 pm: |
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I forgotto mention I have a 19 and half fish/ski Seapro with a Merc 150 Saltwater and using a 19 pitch but only hit 5250 RPM it is a 3 blader make sure your tach is reading correctly |
Cliff Casavant
Member
Username: chickenfry
Post Number: 77
Registered: 05-2009
| | Posted on Thursday, August 13, 2009 - 04:14 pm: |
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Hello Bill,
the rule of thumb is -is- for example a 4 blade 20 degree as compared to a 3 blade would need to be a 22 degree.
your pro = to a 3 blade would be 26 degrees
I believe with this you are over pitched and that is why you are having trouble with the hole shot you have enough power to run but it takes a bit to get their I would recommend staying with 4 blade
but dropping a couple of degrees |
jamie campbell
Advanced Member
Username: outboard_doctor
Post Number: 502
Registered: 02-2009
| | Posted on Friday, August 14, 2009 - 05:35 am: |
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You are definitly over proped and the tacho pulse setting is wrong giving you a higher reading... your boat should have a 19p at the most |
Denis Henry
Member
Username: le_fisher33yahooca
Post Number: 22
Registered: 03-2008
| | Posted on Friday, August 14, 2009 - 08:51 am: |
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Hi Joe, I tried the site for props and couldn't get through. http://dansdiscountprop.com It should read http://dansdiscountprops.com
Nice site. |
