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Starting point for new z18
2019 z18 175 4 stroke pro xs 24p fury
6 inch jack plate prop to pad 3 1/4"
Hot foot
With a medium tournament load 3/4 tank fuel
2 people equaling 440lbs and full live well it was slow to plane and would only turn 5000 rpm 58 mph with full trim. I am comparing slow to breaking it in with half tank fuel no gear and 220lbs of me. Does this sound right or do I need to tinker. After break in I pulled it to 5500 rpm at 64 and trimmed down due to chine walk. Thank you in advance.
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I forgot to mention 3 blade fury and no rooster tail.
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Your about 1000 rpms lower than you want to be so I'd raise it 1/4" just to see how it runs then raise it another 1/4" and see how many rpm's you can turn it. You may have to get a 23" fury 3 for your boat because at 5500 empty you are still 500 rpm's below max and you want to get as close to max rpm's as you can.
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Started raising the motor 1/4" at a time. I stopped at 2 inches prop to pad. Finally started getting a little rooster tail about half the height of the the motor. Water pressure was 20 psi @5600 rpm GPS 63 mph. I'm still not happy with the speed. I fell it should be faster and the steering was a little stiff. What should I try next? Maybe raise the motor some more or prop or vent plugs. The prop doesn't have any plugs in it now. It did plane very fast though.
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Raised the motor up to 2" ptp. Water pressure 20 psi@5600 rpm 63 mph hummingbird helix GPS. I'm starting to get a little rooster tail now about half as high as the motor. The steering is still a little stiff. This still doesn't seem right to me. I feel it should be faster. What should I try now? Keep raising motor or maybe a prop change.
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Raised motor to 2" ptp. 20 psi water@ wot. 5600 rpm as high as it would go hummingbird helix GPS 63 mph. Steering a little stiff and a little rooster tail coming up. Still not happy. I think it should be faster
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If the steering got stiff your too high so drop it back down 1/4" and try it. 63 is probably close to the top speed your going to get with that boat and motor. Just the hull weighs 1700 lbs dry and that's a lot of weight for a 175 to push much faster. The only thing I would do is get a 23 Fury to try to get the rpm's up on that motor.
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Thank you I will give it a try.
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If it's still stiff after dropping it a 1/4" drop it another 1/4". You may need to drop more but don't drop it too much at one time.
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BBC SPONSOR/ Shallow Water Anchors Moderator
I think your at about your max with a 175.. 63 to 64 best your going to see.
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Yes 63-64 but a 23 fury will get your rpm's up and make your motor last longer.
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mine came with 22p tempest. 62.5 so far 5850, 5.5 hrs on the motor so halfway through break in.
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I have ordered a vessel view to confirm all my gauges. I also talked to my nearest prop shop and they recommended going down to a 23 fury to get to max rpms. I'm fine with wot being 64 I just want my new boat and motor to be able to run it's full potential. Most of the trips out i have taken i run about mid to high 50's, once again i just want it to be set up to run it's full potential. thank you. When i get my vessel view i will update.
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I have also lowered the ptp down to 2 7/8" because there was no performance gain when I went higher.
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Just confirmed with vessel view. 375lbs of people 1/2 tank fuel half full live well. Wot 61.7 mph @ 5200 rpm. Half tournament load full trim. No rooster tail and no chine walk. PTP 2 7\8 " . I am going to get the dealer to switch out my 24 fury with a 23 fury.
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