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 25 MPH top speed GTR 40 on a 1854 
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Joined: Mon Feb 27, 2012 1:43 pm
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Post 25 MPH top speed GTR 40 on a 1854
Looking at other threads, seems like I am not getting the right performance out of my boat. We have an uncle j 1854, and a new Gator Tail 40. 2 blade stock prop. There is pretty much no hole shot, takes quite a while to get on a plane. Once it gets going the speed picks up well, but it tops out around 25 mph. No cavitation issues.


Any recommendations?


Thu Sep 16, 2021 1:56 pm
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Location: West Monroe, LA
Post Re: 25 MPH top speed GTR 40 on a 1854
Maybe a motor height to transom height mismatch? Does gt even make short transom motors still?

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Thu Sep 16, 2021 2:08 pm
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Post Re: 25 MPH top speed GTR 40 on a 1854
GT doesn’t make short transoms anymore. Don’t remember what year they stopped but they don’t make them on the new XD units.

What 2 blade are you running?


Thu Sep 16, 2021 7:59 pm
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Post Re: 25 MPH top speed GTR 40 on a 1854
the gator tail 2 blade prop is comes with. Seems like something missing


Fri Sep 17, 2021 5:40 am
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Post Re: 25 MPH top speed GTR 40 on a 1854
Is it a fat blade or a ca57?


Fri Sep 17, 2021 6:59 am
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Post Re: 25 MPH top speed GTR 40 on a 1854
Its the stock 2 blade prop on the gator tail website. Came with the motor brand new


Fri Sep 17, 2021 7:02 am
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MMT F.E.

Joined: Mon Jul 14, 2014 8:19 am
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Post Re: 25 MPH top speed GTR 40 on a 1854
Sounds like your valves may be like the ones that came on my Briggs. 40% leakage off the lot. Check and get a valve job if that’s it


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Fri Sep 17, 2021 4:21 pm
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Location: Trinity Bay - Texas
Post Re: 25 MPH top speed GTR 40 on a 1854
duckwillie wrote:
Looking at other threads, seems like I am not getting the right performance out of my boat. We have an uncle j 1854, and a new Gator Tail 40. 2 blade stock prop. There is pretty much no hole shot, takes quite a while to get on a plane. Once it gets going the speed picks up well, but it tops out around 25 mph. No cavitation issues.


Any recommendations?


This... Also how many RPMs are you turning at 25mph ?

Russ wrote:
Maybe a motor height to transom height mismatch?

#CFFITR
#mudmotor>physics


Post up a picture or two on the trailer from the side - at the same level as the hull bottom so we can see
your motor in the position where you get best performance and can see the alignment of the shaft in relation
to the the hull bottom....

:!:

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Sun Sep 19, 2021 4:31 am
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Post Re: 25 MPH top speed GTR 40 on a 1854
I moved the motor up to the highest position on the bracket. I haven't run it yet, but my brother did and said its already running better. I'll get the top speeds and RPM's later this week and let you know. Thank you for the help!


Wed Sep 22, 2021 9:36 am
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Post Re: 25 MPH top speed GTR 40 on a 1854
Moving the motor on the bracket helped. 2 guys on the boat hit 4650 RPMs and 27 mph. Still having some trouble w hole shot under a load, but its a big boat. Performed great in some low tide creeks, ate right through it in places I used to get stuck, in a smaller boat


Mon Oct 04, 2021 3:35 am
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Post Re: 25 MPH top speed GTR 40 on a 1854
Throw a fat blade on it.
Better load carrying
Better hole shot
My 1760 didn’t like the stock prop much at all. I put the fat blade on it and it woke it up.


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Sun Nov 07, 2021 4:35 am
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