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snowgetter1
MMT Member
Joined: Thu Jun 28, 2012 10:33 pm Posts: 38
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 16x46 GT with a 27 GDSD
Got a great deal on a new 16x46 gt and put my 27 gdsd on it. Max speed is 20mph in deep water and 21 in mud. I thought it would push it a bit faster, but it did increase 3mph from the 17' Tracker I had. The current rig has gas tank and trolling battery up front and starting battery in the back. Ran 20 mph from 3300-3600rpms. If i trimmed up for more rams speed would fall off. Any ideas or similar rigs out there with performance like this?
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Fri May 09, 2014 6:40 am |
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WhoDat88
MMT 1000 Club
Joined: Thu May 23, 2013 4:24 pm Posts: 2912 Location: Thibodaux, La
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 Re: 16x46 GT with a 27 GDSD
Is that speeds solo or with someone?
_________________ 1850 Predator Series Stick Steer Option 40HP Gatortail
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Fri May 09, 2014 6:45 am |
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snowgetter1
MMT Member
Joined: Thu Jun 28, 2012 10:33 pm Posts: 38
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 Re: 16x46 GT with a 27 GDSD
Just me in the boat.
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Fri May 09, 2014 6:48 am |
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WhoDat88
MMT 1000 Club
Joined: Thu May 23, 2013 4:24 pm Posts: 2912 Location: Thibodaux, La
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 Re: 16x46 GT with a 27 GDSD
You should be faster. We have to eliminate a few things. 1. Is your prop warn? 2. How high is your cavitation plate above the water at max speed?
_________________ 1850 Predator Series Stick Steer Option 40HP Gatortail
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Fri May 09, 2014 6:53 am |
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snowgetter1
MMT Member
Joined: Thu Jun 28, 2012 10:33 pm Posts: 38
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 Re: 16x46 GT with a 27 GDSD
Prop measures 5.5" from center of shaft, so 11" total diameter. The plate was anywhere from about 2-3" out of water at lower rpm to maybe 6" on the higher rpm.
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Fri May 09, 2014 7:03 am |
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WhoDat88
MMT 1000 Club
Joined: Thu May 23, 2013 4:24 pm Posts: 2912 Location: Thibodaux, La
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 Re: 16x46 GT with a 27 GDSD
_________________ 1850 Predator Series Stick Steer Option 40HP Gatortail
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Fri May 09, 2014 7:06 am |
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snowgetter1
MMT Member
Joined: Thu Jun 28, 2012 10:33 pm Posts: 38
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 Re: 16x46 GT with a 27 GDSD
66 hours on the motor/prop. I have never really ran it rough or in a lot of mud or sand. Have hit a few stumps here and there, but the prop has no Knicks or bends in it.
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Fri May 09, 2014 7:14 am |
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WhoDat88
MMT 1000 Club
Joined: Thu May 23, 2013 4:24 pm Posts: 2912 Location: Thibodaux, La
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 Re: 16x46 GT with a 27 GDSD
_________________ 1850 Predator Series Stick Steer Option 40HP Gatortail
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Fri May 09, 2014 7:19 am |
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snowgetter1
MMT Member
Joined: Thu Jun 28, 2012 10:33 pm Posts: 38
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 Re: 16x46 GT with a 27 GDSD
I have never checked the belt tension. I will have to get a gauge. The motor seems to have plenty of power and torque and I was not expecting a speed demon, but I thought I could at least get about 25 mph out of it. The bow of the boat did seem to be running a bit high out of the water though. Next week I will try to get it out with another person to see if that makes a difference.
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Fri May 09, 2014 7:23 am |
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WhoDat88
MMT 1000 Club
Joined: Thu May 23, 2013 4:24 pm Posts: 2912 Location: Thibodaux, La
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 Re: 16x46 GT with a 27 GDSD
I got 24.5 out of my old 23hp. You should get 25. Check the bottom of the boat for hooks. That could also be your problem.
_________________ 1850 Predator Series Stick Steer Option 40HP Gatortail
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Fri May 09, 2014 7:49 am |
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