14x17,13 1/4x17,13 3/4 x 15 ??????????????

[Late Nites]

1995 Johnson 112 spl<br /><br />will average 800-900 lbs. payload, on a 1995 wellcraft ccf 190. These are my 3 choices listed above. The tach is still acting up on the boat but does go in and out,but when it gets on plain, I try to keep it around 4000 rpms to get to where were going. I do know that the original 10 year old, 14x17 is struggling to get on plane. I'm getting a prop from the kids for F's-day, and want the right one for them to be excited about.<br /><br />Should I even consider a 4 fin prop? By the description at BPS's it sounds perfect for what I need. It says you lose top end, buy I'm no too worried about 1-2 MPH. By the way it will be aluminum.<br /><br />Also, what is the best cruising RPM for this motor? Thanks for the help.

 

[Dhadley]

Re: 14x17,13 1/4x17,13 3/4 x 15 ??????????????

The best prop will be the one that puts you at 5800 with your average load. If your running a 17 now thats probably a safe bet. Without a tach you'll never know. Unless the starboard pistons coke up and then a ring breaks. Then you'll know the motor's lugging.<br /><br />With an aluminum prop we'd bet your motor is mounted all the way down. That may be robbing you of efficiency and engine life. Again, no way to know without a tach.<br /><br />4 blade props are a good choice but you'll have to be willing to adjust the set up. Raising the motor will certianly be involved. Real simple but probably necessary. Once more -- get the tach operational first.