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rubbinisracin
MMT Pro Member
Joined: Sun Sep 01, 2013 1:05 pm Posts: 213 Location: Wake Forest, NC
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 I think my boat is running slow
Hey just got my first mud motor. Its a 15' all welded MonArk with a 23hp mud buddy SD, boat is a little rough and its an 86' and the motor is a 06'. The prop says 11L 10 on it but it measures 8.5 inches in diameter, the guy said it was the stock prop. It was worn pretty bad so I smoothed it out a bit. My boat is only running 11 mph with Just me. In water rpm is 3850 and out of water rpm is 4000. What prop do I have? I'd like to get at least 18 mph what prop should I get? Or am I wasting my time with the prop and should just be happy with 11mph?
_________________ 1854 CC backyard build with GTR 37 EFI
Build thread here.. viewtopic.php?f=4&t=66815
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Mon Sep 02, 2013 11:58 am |
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mattpittinger
MMT Pro Member
Joined: Sat Nov 03, 2012 1:37 pm Posts: 126 Location: Longview, TX
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 Re: I think my boat is running slow
Go get you a new 11x10 you'll see a world of difference that prop is EXTREMELY worn if it measures 8.5"
_________________ 16x54 GDSD Simple..... (was simple, now a rocket)
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Mon Sep 02, 2013 12:13 pm |
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270Handiman
MMT 1000 Club
Joined: Thu Dec 29, 2011 10:46 pm Posts: 2342 Location: Mandeville, LA
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 Re: I think my boat is running slow
You said boats a 'little rough'....what's the bottom look like?
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Mon Sep 02, 2013 12:57 pm |
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rubbinisracin
MMT Pro Member
Joined: Sun Sep 01, 2013 1:05 pm Posts: 213 Location: Wake Forest, NC
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 Re: I think my boat is running slow
Its a little wavy. But I wouldnt guess 10 mph worth of rough... I've tried shifting the weight around with not a major difference from it. Any particular brand prop I should use?
_________________ 1854 CC backyard build with GTR 37 EFI
Build thread here.. viewtopic.php?f=4&t=66815
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Mon Sep 02, 2013 1:09 pm |
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TonyGMcElroy
MMT Addict
Joined: Tue Nov 15, 2011 3:27 pm Posts: 664 Location: Henderson, Tx
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 Re: I think my boat is running slow
New prop will prolly double your speed. Where r u located
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Mon Sep 02, 2013 1:32 pm |
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rubbinisracin
MMT Pro Member
Joined: Sun Sep 01, 2013 1:05 pm Posts: 213 Location: Wake Forest, NC
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 Re: I think my boat is running slow
Raleigh, NC
_________________ 1854 CC backyard build with GTR 37 EFI
Build thread here.. viewtopic.php?f=4&t=66815
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Mon Sep 02, 2013 1:33 pm |
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North LA Hunter
MMT Elite Member
Joined: Mon Aug 02, 2010 8:39 pm Posts: 6976 Location: West Monroe, LA
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 Re: I think my boat is running slow
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Mon Sep 02, 2013 1:49 pm |
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mattpittinger
MMT Pro Member
Joined: Sat Nov 03, 2012 1:37 pm Posts: 126 Location: Longview, TX
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 Re: I think my boat is running slow
_________________ 16x54 GDSD Simple..... (was simple, now a rocket)
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Mon Sep 02, 2013 1:55 pm |
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rubbinisracin
MMT Pro Member
Joined: Sun Sep 01, 2013 1:05 pm Posts: 213 Location: Wake Forest, NC
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 Re: I think my boat is running slow
I see they have a 11x10 on the mb website for 195. Prob should just get that one. They also list the 9x6 and 9x5 but it sounds like the 11x10 is the way to go, no?
_________________ 1854 CC backyard build with GTR 37 EFI
Build thread here.. viewtopic.php?f=4&t=66815
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Mon Sep 02, 2013 1:57 pm |
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270Handiman
MMT 1000 Club
Joined: Thu Dec 29, 2011 10:46 pm Posts: 2342 Location: Mandeville, LA
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 Re: I think my boat is running slow
Call Boatdr in the morning. He can tell you what you need, sell it to you, and ship it to you.
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Mon Sep 02, 2013 2:03 pm |
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rubbinisracin
MMT Pro Member
Joined: Sun Sep 01, 2013 1:05 pm Posts: 213 Location: Wake Forest, NC
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 Re: I think my boat is running slow
Alright sounds good
_________________ 1854 CC backyard build with GTR 37 EFI
Build thread here.. viewtopic.php?f=4&t=66815
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Mon Sep 02, 2013 2:08 pm |
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North LA Hunter
MMT Elite Member
Joined: Mon Aug 02, 2010 8:39 pm Posts: 6976 Location: West Monroe, LA
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 Re: I think my boat is running slow
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Mon Sep 02, 2013 3:17 pm |
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Puddler45
MMT 1000 Club
Joined: Thu May 03, 2012 9:07 am Posts: 1199 Location: Wisconsin's waters and woods
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 Re: I think my boat is running slow
_________________ 1744 floating a 23 MBHD Stage 2
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Tue Sep 03, 2013 6:42 pm |
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DUCK HEARSE
MMT 1000 Club
Joined: Fri Apr 06, 2012 8:48 am Posts: 3161 Location: Alabama
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 Re: I think my boat is running slow
should have bought a dixie
_________________ Twenty years from now you will be more disappointed by the things that you didn't do than by the ones you did do. So throw off the bowlines. Sail away from the safe harbor. Catch the trade winds in your sails. Explore. Dream. Discover. - Mark Twain
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Tue Sep 03, 2013 6:43 pm |
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North LA Hunter
MMT Elite Member
Joined: Mon Aug 02, 2010 8:39 pm Posts: 6976 Location: West Monroe, LA
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 Re: I think my boat is running slow
Holeshot was better than a bb but dropped about 100-200 rpm. But gained speed. And that was on a 17x48 all 1/8. I doubt boat size or weight has anything to do with it but it might. It's alot harder prop also. Ran a bb for about 50-60 hrs and wore it down to 11". Then put that Hopkins on it until 130 hrs and didn't wear down enough to measure. Guy still has that prop on it and it has close to 200 hrs on it and still runnin 22-23.
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Tue Sep 03, 2013 7:42 pm |
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Puddler45
MMT 1000 Club
Joined: Thu May 03, 2012 9:07 am Posts: 1199 Location: Wisconsin's waters and woods
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 Re: I think my boat is running slow
Nice sounds like that will be an improvement I'm running 22-24 with 2 ppl avg 1744. Got bot 40 hours on it mostly sees veggies and soft mud but I've smoked a few rocks that took some small chips out of it but ill try that route next time. Thanks
_________________ 1744 floating a 23 MBHD Stage 2
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Tue Sep 03, 2013 8:11 pm |
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rubbinisracin
MMT Pro Member
Joined: Sun Sep 01, 2013 1:05 pm Posts: 213 Location: Wake Forest, NC
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 Re: I think my boat is running slow
I ordered a 11x10 from boatdr. I'll post how it does when it comes in.
_________________ 1854 CC backyard build with GTR 37 EFI
Build thread here.. viewtopic.php?f=4&t=66815
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Thu Sep 05, 2013 12:58 pm |
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renovator
MMT Pro Member
Joined: Sun Jun 03, 2012 4:41 pm Posts: 485
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 Re: I think my boat is running slow
I sold and bought back my 23 bandi. That motor has been run 150 hours at 4600 without problems. Went to the bb to lower the Rpms and was still riding the limiter in deep water. Ran 28 all day long on a 1648 gd hull. Of course with only one person.
_________________ 1648 gd hull flying in front of a stage 3 with fpr
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Sat Sep 07, 2013 11:36 am |
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