Home › Forums › Bass Cat Boats › 2003 PIV with 2014 Etec set up?
Shimanonut.
I will not make you go thru the details but here are the bullet points. I bought a used 2003 PIV with a 2003 Evinrude HO direct injection. Both previous owners are friends of mine so I know that the speed is close enough. The boat was a 67 to 70mph boat depending on amount of gas and livewells etc, etc. LONG story but I needed to repower the boat and found a 2014 Etec HO 200HP. Running the same 4 blade Merc Trophy prop that the previous set up had. Dealer set the new motor in exact same bolt holes so height is the same. NOW – 5800 rpms is all I can get, and 61mph max speed but hole shot was AMAZING. Raised it 1″ as a test and NOTHING except I have a worse hole shot, although it is still pretty good. So I guess Im asking for help on where to go next! In happy to keep raising it and Im happy to play with props if needed. I thought about another inch but the rooster tail is so bad on the new set up that I dont like that idea either. I have the jackplate marked where I started and Im happy to go up or down from starting spot depending on suggestions. Im NOT looking to squeeze 72 out of it and frankly dont have a “magic MPH” that Im trying to reach but I know that the set up has a lot more to give me. Im open to thoughts, thanks in advance!
I did forget to add, that the Jackplate was flush and had not been moved since the boat/motor left Cat in 03. I also forgot to add that I know 1″ is drastic! I understand that but was looking for a new starting place to work with.
Is the new lower unit same gear ratio as the old one?
Chris, valid question and here is my best guess as Im having the dealer look into this right now.Previous gear case – Lightning case was 1.71:1New gear case – 1.85:1Dont pretend to understand how much of a difference that makes but doing my best to answer your question. Thanks for the help!
Thats the difference (gear ratio). I dont see what pitch your Trophy is, but you could try a 26 Tempest and have it worked to get most out of it, or maybe even a 27 Tempest. If you just want to run a prop straight out of the box, I would go with a 26 Fury. Start about 3-1/2″ prop to pad. I have a P4, and I like a Tempest better-seems to have better bow lift. I have run a Fury, and it is faster, also has great holeshot, but Fury seems to run a little flatter than I like. There are other props out there that would work (might even be better), but I believe these to be fail-safe choices, unless you are trying to squeeze every last thing you can get out of it
Thanks for the help Chris! The Trophy that is on the boat is a 27″. I have a 26″ brand new in a box but I have to get it set for the Evinrude hub. I will ask my dealer about trying some props as well.
christaylor wrote:Thats the difference (gear ratio). I dont see what pitch your Trophy is, but you could try a 26 Tempest and have it worked to get most out of it, or maybe even a 27 Tempest. If you just want to run a prop straight out of the box, I would go with a 26 Fury. Start about 3-1/2″ prop to pad. I have a P4, and I like a Tempest better-seems to have better bow lift. I have run a Fury, and it is faster, also has great holeshot, but Fury seems to run a little flatter than I like. There are other props out there that would work (might even be better), but I believe these to be fail-safe choices, unless you are trying to squeeze every last thing you can get out of itWhich Fury did you run on the PIV?13 PIV w/ 200 MercIG: WarriorRiverCustomRods
I have an Optimax. Run a 25 Tempest normally, tried a 25 Fury. Little too much when Im loaded, unless its still cold weather. I think a 24 Fury would do good for me, but Ive never had a chance to try one. Im satisfied with the Tempest. I also tried a 26 Bravo FS with 8 holes, a 26 SL4, and a 24 SL4-Both SL4s had 4 1″ holes. The 26s were too much pitch, although the holeshot with the 26 SL4 was still good. The 24, I really liked, but it couldve stood to be worked up to a 25. All that said, I was still satisfied with the Tempest enough not to change. Last edited by christaylor on June 6th, 2016, 9:20 pm, edited 1 time in total.
The 27 pitch prop at 10% slippage should still get you in the 70-72 mph range at 5800 RPM . — Mathematic formula for approximate speed is engine rpm divided by lower unit ratio . –This gives you prop shaft RPM . — Multiply that by prop pitch and divide by 12 . — This gives you feet per minute . — Now divide that by 5283 and multiply by 60 . — This gives you the mathematical speed with zero slippage . — Of course , no prop runs at 100% , which would be 80.114 m.p.h. at 5800 rpm . —– That 200 H.O. is a torque BEAST . — My nephew runs one on his 07 Pan4 , and itll run 68 / 70 with both of us in it / 1/2 gas and gear , and I weigh in at about 325 .
Ok BigCatter I dont pretend to have the back ground to argue or frankly agree with you. You clearly have more knowledge than I do on this subject so I have to ask, if I had more slippage wouldnt that make the rpms go up?Reason Im asking is if the prop isnt getting clean water I would get blow outs and high rpms right?I was worried that the Side Vision (Raymarine) transducer could be causing bad water flow to the prop but I “assumed” it would make for a higher rpm and the sound and feel of blow outs. I have gotten none of that.
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