picksbigwagon Posted June 4, 2009 Share Posted June 4, 2009 finally pulled the trigger for a new prop, the old dinged up prop was a 13x11 (1989 evinrude 40 HP tiller on a 1989 crestliner fishhawk) and after finally talking with a tech at CP in shakopee, I went with a Hustler 12.5x13 prop. I have never been happy with the speed I have gotten with my boat. It has never really bogged down on take off so he suggested I went up 2 degrees in pitch to start with. I have never gotten more than 23 mph (gps speed) with my boat. I will get 21 MPH with 3 adults in the boat so he said I was getting enough power, not enough speed. So if I can get on Prior this weekend, we'll see what happens. One of the "pro's" at GM had told me to go with a smaller pitch.....I do have a trim and tilt foot switch for my tiller so I am not that worried about getting up on plane, but I seriously want to get more speed..... Quote Link to comment Share on other sites More sharing options...
marine_man Posted June 4, 2009 Share Posted June 4, 2009 Good Luck!marine_man Quote Link to comment Share on other sites More sharing options...
picksbigwagon Posted June 4, 2009 Author Share Posted June 4, 2009 If I can get an extra 5 mph I will be happy............either way, the snaggly prop that is on there right now will be history in a day or two....until I get it fixed Quote Link to comment Share on other sites More sharing options...
PerchJerker Posted June 4, 2009 Share Posted June 4, 2009 I hope it works but I think getting 5 more mph out of a 40 is a pretty big stretch ....the only way that would happen is if you had a terrible setup to start with before you switched props. Good luck. Quote Link to comment Share on other sites More sharing options...
Northlander Posted June 4, 2009 Share Posted June 4, 2009 Ya if ya get 2 mph MAYBE 3 you will be lucky. Especially with a 40 horse. Quote Link to comment Share on other sites More sharing options...
hydro Posted June 4, 2009 Share Posted June 4, 2009 I think he will be happy. In a perfect world with the engine turning 5800 rpm through 2:1 gears and 15% slip, an 11" prop calculates to 25.7 MPH and a 13" wheel will net 30.3 MPH. Let's see how close it comes out! Quote Link to comment Share on other sites More sharing options...
boatfixer Posted June 5, 2009 Share Posted June 5, 2009 ....but you wont turn 5800 with both a 13 and 11. Engine rpms are going to drop with the 13. Quote Link to comment Share on other sites More sharing options...
Surface Tension Posted June 5, 2009 Share Posted June 5, 2009 That is a fairly light boat. I think you should be seeing around 27 MPH with the right prop and good weight distribution. Your a big guy. How many batteries and where are they? Too much weight in the stern will slow you down. Quote Link to comment Share on other sites More sharing options...
hydro Posted June 5, 2009 Share Posted June 5, 2009 Well, that's my point about the "perfect world". I did the calculator as a reference point where only one variable (pitch) is changed. Let's see what he gets! Quote Link to comment Share on other sites More sharing options...
Northlander Posted June 5, 2009 Share Posted June 5, 2009 I say he will only gain a few so my guess is 25-27 mph. Especially with 3 guys in that boat. Quote Link to comment Share on other sites More sharing options...
picksbigwagon Posted June 5, 2009 Author Share Posted June 5, 2009 We'll find out this weekend.........anything more than 23.1 (gps speed) will be fantastic.........I have 2 31 series batteries in the front of my boat, but even before I got the trolling motor, I never went faster than 23.1With three guys in the boat, I still get 22 mph.....the power is there, but the speed isn't, we'll see.................either way, I needed a new prop after bouncing the old one off rocks in WI Quote Link to comment Share on other sites More sharing options...
picksbigwagon Posted June 10, 2009 Author Share Posted June 10, 2009 Just got back with my Kindergarten Graduate (today!!!) He sat in the front, on top of two series 31 batteries and a 74# trolling motor on the front and we were going 28.3 mph. So, with that weight up front, me and a kicker motor to boot sitting the back of the boat, I would say the move from a 13x11 getting 23.1 mph with me solo to 28.3 mph is a great result. I am extatic to say the least........hole shot was better than the old prop too...........I am staying with this prop although i did notice a little porpoising Quote Link to comment Share on other sites More sharing options...
PerchJerker Posted June 11, 2009 Share Posted June 11, 2009 Sounds like the new prop kicks a$$!!!!! Quote Link to comment Share on other sites More sharing options...
paceman Posted June 11, 2009 Share Posted June 11, 2009 Good Job Picks!!! Quote Link to comment Share on other sites More sharing options...
picksbigwagon Posted June 12, 2009 Author Share Posted June 12, 2009 we caught 4 blue gills too, okay my future 2nd grader caught 4 fish last night, I was having a blast watching him Quote Link to comment Share on other sites More sharing options...
Northlander Posted June 14, 2009 Share Posted June 14, 2009 Good deal. Im glad you gained some. Quote Link to comment Share on other sites More sharing options...
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