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Location: Lake Geneva, WI | I'm in need of some help regarding my prop setup. I bought the boat last fall, 1995 skeeter S1850 18' with a 95 175 Mercury efi. The boat came with two stainless props, one is a tempest 25 pitch, which cannot get the boat on plane with the gas tank full and two people in the boat. The prop that is on the boat is a 28 pitch 3 blade (I think, I couldn't find on the prop). With this prop I am able to get up on plane, but need to go full throttle and I does take a while to get up 25-35 seconds I'm guessing, the hole shot is terrible, the rpms are around 4400 at full throttle on plane. Also it seems like I am pushing a lot of water when I do finally get on plane vs. the boat being up on top of the water.
I really don't know much about props, but I know that something is not right with current prop set up. Does anyone have any suggestions on what prop/pitch this set up should have. Is there somewhere in the metro that I could try out a few different props?
Any help is appreciated! Thanks
Mike
Edited by muskynut09 7/27/2014 7:13 PM
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Posts: 32934
Location: Rhinelander, Wisconsin | 19 to 21 pitch is what you want depending on the prop selection. |
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Posts: 303
Location: Not where I want to be! | Go to this website, Bass Boat Central, Skeeter boat forum. They can help you.
http://www.bbcboards.net/skeeter-boats/ |
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Location: Lake Geneva, WI | Thanks guys. Is there much of a difference going to a 4 or 5 blade prop vs. a 3 blade prop? Would I still want to be in the 19-21 pitch range?
Thanks again! Mike |
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Posts: 3508
Location: Elk River, Minnesota | Hiya,
I would agree with Steve Worrall here. I believe a 21 pitch will be very close to what will be right in ballpark to reach your optimum running rpm.
That particular motor is designed to run a max rpm of 5600. With your current 3 blade prop, you are finding you are over-pitched by a large margin. Dropping to a 21 pitch in the same prop design and diameter would roughly put you in that 5600 range. In a nutshell, each inch of pitch is roughly worth 200 rpms give or take, so by dropping 7 inches in pitch you would be gaining somewhere around 1200 to 1400 rpms or so. In many cases, though, dropping that much in pitch may also have a little bit of increase in diameter as well...not always, but is very common, so you may find going up 1/2 inch in diameter while dropping those 7 inches will be right in the sweet spot of the motor.
Given different props in that 21 pitch range, you will find one that will outperform the others in handling, top end, and hole shot....although you will find with the mercury props, they will be vented and can be plugged with different sized holes to optimize the prop to your liking....a really nice feature that from what I know mercury is the only one that offers such a design. A 3 blade tempest plus would be a good starting point...
Steve |
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Location: Lake Geneva, WI | Thanks for the help guys! I got a new 21P prop last night and went out and tested it and it worked great and the RPMs where right where they should be.
Steve I'll see you at the outing in a couple weeks 
Mike |
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