Egrets Landing wrote: »
I returned the 15 for a 19. The 15 got 47-49 at 6000 with a mod. load in fresh water. Hole shot was similar. The 19 gets 52 in salt with moderate gear, 1/2 tank, two guys, 3 batteries and the trolling motor at about 5600 on the analog guage with a decent trim up. I think it will get 53 with the same load I ran testing the 15. Just hooked up the nema cable system to the engine this week to check the rpm accuracy but at the dock they were in sync up well to about 2800 rpm. First time to check the entire range of rpm vs the analog will be in the keys later this month. Bottom line is the the old EFI motors were stronger than the pro xs. The efi pushed my boat about 5-7 mph faster than the new pro xs of same HP with the same load using a 4 blade spinelli prop (I think 23p) at about 5750 rpm. The spinelli on the new engine would get about 56 top end but the hole shot, plane rpm and everything else sucked and was nowhere close to the performance of the turbo prop. Sticking with the 19 since my typical cruise speed is about 30 to 35 mph and it works great in that range. Dissapointing to loose the extra power that would squeeze out the extra speed for the rare times I run it at max but it is not the big of a deal to me. My rig is all glass and is a couple of hundred lbs heavier than most of the new ones and my platform is a foot higher than stock and it has more options and stuff attached when compared to most as well. Low 50s is probably about the best the pro xs can do on my rig no matter what the prop. I run 3 different 4 blade props now ranging from 17 - 19 and there is no substantive difference in max possible speed although the rpms varies. I have the 17 and 19 turbo and an 18 p Merc Rev. 4. All of them run between 5500 and 6000 rpms with a moderate trim at full throttle. Around most of where I run, speed to the spot is mostly a function of knowing how to run the straightest line there rather than the highest mph.
Underslot wrote: »
I've seen mid 50s with my boat loaded to the hilt for fishing and sandbaring with a Ultima 21... weird that you cann't get above low 50s. Can't wait to try the new Croxton Razor!!!
seavee05 wrote: »
Well, I don't know if this confirms anything but for what it's worth, I ran 55+ @ 5500 rpm wot yesterday. My 175 pro xs was installed in April, I'm running a 20" Ultima with the motor mounting on the second hole down, that's trimmed out with two people on board and a half tank of fuel. Add to that, the fact that it's 55 degrees on Long Island. Florida built 189 c/k.
So, I'll defer to the experts, do I need to change my prop to gain a couple hundred rpm, or lower the motor down one hole. I am now very close to the top speed of the 175 carbed Yamaha Vmax I replaced, and I think I could have trimmed it out to reach 56.
FlatsBoy wrote: »
From my experience the Florida built boats are heavy and will not get the same performance numbers as the newer boats that is fact. My motor is mounted on the second hole down also. I have driven the same boat with the motor all the way down on the first hole. I feel that is where the boat performs the best. I will get around to lowering it. With it mounted in the second hole it will run flatter and can ventilate out of the hole a little also can lose grip in tight turns with the 20 Ultima. Your numbers are pretty good for a Florida built boat lowering the motor will help and a 19 pitch Ultima by getting the hull out of the water more and increasing RPM's. IMO
Lunch time crowd wrote: »
When you say Florida built boats are heavy...I understand that to mean that they are heavier than those built in NC. How much heavier are they? As I understand it, they have the same hull but a different deck, can't be that much of a difference. That said...Should I stay away from the Florida built EGRETS.