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 GDSD...Do I need a new prop? 
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Post GDSD...Do I need a new prop?
Hey guys,

I have a 1748 Uncle J with a 27hp GDSD. I ran the boat in the sand on the Texas coast for about 2 years. It seems like I've lost a bit of speed and its throwing a big rooster tail. My Tiny Tach has died so I don't know what type of RPMs I'm running WOT.

I know next to nothing about props, but I'm assuming I need a new one or get this one worked. It measures fine, but I've got a couple dings. I definitely need some help/advice.

IMG_2399.jpg

IMG_2398.jpg

IMG_2397.jpg

Thoughts? Thanks guys!


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Sat Jan 27, 2018 2:34 am
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Location: Cut Off, La.
Post Re: GDSD...Do I need a new prop?
It looks like you need a new prop.
But the first step is to get a tach and see what your rpms are.
If you’ve run sand for 2 years, your prop is about toast.
I always found that the GDSD’s didn’t throw a big rooster tail, maybe trim down a bit.

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Sat Jan 27, 2018 9:16 am
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Post Re: GDSD...Do I need a new prop?
Buy a new prop and get the old one reworked, never hurts to have backup.

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Sat Jan 27, 2018 9:21 am
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Post Re: GDSD...Do I need a new prop?
Thanks guys! Got a new tach on order. Coming tomorrow.

Should I just buy a new one from GD or are there better/cheaper options out there? I searched around a little bit but I just found more expensive props.


Sat Jan 27, 2018 5:13 pm
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Post Re: GDSD...Do I need a new prop?

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Sat Jan 27, 2018 5:23 pm
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Post Re: GDSD...Do I need a new prop?
Hill Marine has 2 blade for 219.00 plus shipping, multiple pitch options.

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Uncle J Custom - 19x54 CC Skiff w/40XD GTR


Mon Jan 29, 2018 10:33 am
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Post Re: GDSD...Do I need a new prop?


Mon Jan 29, 2018 4:08 pm
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Post Re: GDSD...Do I need a new prop?
not on their website, but if you change to a 2 blade -- need to go up in pitch and/or diameter. that is where a tach comes in handy for hitting the WFO rpm range in the sweet spot.

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Mon Jan 29, 2018 8:04 pm
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Post Re: GDSD...Do I need a new prop?
You don't necessarily need a new prop.

Send it to get re-worked. It still has life left.

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Tue Jan 30, 2018 10:54 am
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Post Re: GDSD...Do I need a new prop?


Wed Jan 31, 2018 3:16 am
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Post Re: GDSD...Do I need a new prop?
Diameter means nothing....

Measure ACROSS blade width - new is 3 1/2" - 3 1/4" lost some performance - under 3" junk...

PS - never seen anyone properly rework a 3 blade !
They over-cup it and you can't keep it down on a GDSD...
Just buy a new prop and keep old one as is as a spare...

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Wed Jan 31, 2018 7:19 am
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Post Re: GDSD...Do I need a new prop?
If anyone can properly rework it, it would be baggy in Houma. Dude is on point.


Tue Apr 24, 2018 7:48 pm
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