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b_coonass
MMT 1000 Club
Joined: Thu Mar 26, 2009 2:08 pm
Posts: 1229
Location: morgan city, louisiana
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 Loss of top end? What could cause this? I have been noticing that i boat has been running slower so i gps'd it yesterday and sure enough I am only getting 19-20mph with a new prop an 2 people, compared to getting 23-24mph with 2 people!
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36hp Pro-Drive with EVT exhaust pushin a 17x42 custom skiff
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| Tue Sep 28, 2010 8:15 pm |
 
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DeathMetalDukk
MMT 1000 Club
Joined: Sat Jun 27, 2009 11:50 pm
Posts: 3777
Location: Knotts Island, North Carolina.
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Re: Loss of top end? check yer rpm's.
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Put yer face in the myrtles.
35 GTR chasing a 1650 Polarkrap.
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| Tue Sep 28, 2010 8:15 pm |
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b_coonass
MMT 1000 Club
Joined: Thu Mar 26, 2009 2:08 pm
Posts: 1229
Location: morgan city, louisiana
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Re: Loss of top end?
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36hp Pro-Drive with EVT exhaust pushin a 17x42 custom skiff
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| Tue Sep 28, 2010 8:22 pm |
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quackconsumer
MMT Elite Member
Joined: Wed Jan 14, 2009 7:54 pm
Posts: 5582
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Re: Loss of top end? Did you get da correct new prop?
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| Tue Sep 28, 2010 8:22 pm |
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DeathMetalDukk
MMT 1000 Club
Joined: Sat Jun 27, 2009 11:50 pm
Posts: 3777
Location: Knotts Island, North Carolina.
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Re: Loss of top end? Governor adjustments wandering perhaps? Need to get a tach so you will know for sure.
_________________
Put yer face in the myrtles.
35 GTR chasing a 1650 Polarkrap.
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| Tue Sep 28, 2010 8:23 pm |
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b_coonass
MMT 1000 Club
Joined: Thu Mar 26, 2009 2:08 pm
Posts: 1229
Location: morgan city, louisiana
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Re: Loss of top end?
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36hp Pro-Drive with EVT exhaust pushin a 17x42 custom skiff
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| Tue Sep 28, 2010 8:26 pm |
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b_coonass
MMT 1000 Club
Joined: Thu Mar 26, 2009 2:08 pm
Posts: 1229
Location: morgan city, louisiana
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Re: Loss of top end?
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36hp Pro-Drive with EVT exhaust pushin a 17x42 custom skiff
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| Tue Sep 28, 2010 8:27 pm |
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DeathMetalDukk
MMT 1000 Club
Joined: Sat Jun 27, 2009 11:50 pm
Posts: 3777
Location: Knotts Island, North Carolina.
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Re: Loss of top end? Like vibration causing the screw to turn, losing the setting. Just a thought.
_________________
Put yer face in the myrtles.
35 GTR chasing a 1650 Polarkrap.
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| Tue Sep 28, 2010 8:28 pm |
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b_coonass
MMT 1000 Club
Joined: Thu Mar 26, 2009 2:08 pm
Posts: 1229
Location: morgan city, louisiana
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Re: Loss of top end?
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36hp Pro-Drive with EVT exhaust pushin a 17x42 custom skiff
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| Tue Sep 28, 2010 8:30 pm |
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DeathMetalDukk
MMT 1000 Club
Joined: Sat Jun 27, 2009 11:50 pm
Posts: 3777
Location: Knotts Island, North Carolina.
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Re: Loss of top end?
_________________
Put yer face in the myrtles.
35 GTR chasing a 1650 Polarkrap.
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| Tue Sep 28, 2010 8:32 pm |
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b_coonass
MMT 1000 Club
Joined: Thu Mar 26, 2009 2:08 pm
Posts: 1229
Location: morgan city, louisiana
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Re: Loss of top end?
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36hp Pro-Drive with EVT exhaust pushin a 17x42 custom skiff
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| Tue Sep 28, 2010 8:47 pm |
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bbb
MMT 1000 Club
Joined: Wed Sep 02, 2009 2:54 pm
Posts: 1554
Location: SW Georgia
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Re: Loss of top end? 10x6 is for a 35HP
Website says a 10x4 for the 31hp, though I don't see a 10x4 for sale, but do see the 10x5.
Is this a new prop from GD or a re-build? Some of the re-builds have extra heavy cup and take away from rpms and speed also.
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19x54 Seminole Extreme with a 35hp CDI GDSD. Mikuni. Marsh Mellow. Heads. Cam.
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| Wed Sep 29, 2010 10:01 am |
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mcnemar1982
MMT Sponsor
Joined: Mon Jan 19, 2009 4:03 pm
Posts: 2216
Location: Walker, Louisiana
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Re: Loss of top end? Is one of da people real fat? Just askin.
_________________
Ideas not coupled with action
never become bigger than the
brain cells they occupied.
Owner
DEEP SOUTH CUSTOM BOATS (225) 252-2700
Good boats ain't cheap, Cheap boats ain't good!
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| Wed Sep 29, 2010 10:18 am |
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b_coonass
MMT 1000 Club
Joined: Thu Mar 26, 2009 2:08 pm
Posts: 1229
Location: morgan city, louisiana
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Re: Loss of top end?
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36hp Pro-Drive with EVT exhaust pushin a 17x42 custom skiff
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| Thu Sep 30, 2010 5:57 am |
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b_coonass
MMT 1000 Club
Joined: Thu Mar 26, 2009 2:08 pm
Posts: 1229
Location: morgan city, louisiana
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Re: Loss of top end?
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36hp Pro-Drive with EVT exhaust pushin a 17x42 custom skiff
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| Thu Sep 30, 2010 5:58 am |
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mcnemar1982
MMT Sponsor
Joined: Mon Jan 19, 2009 4:03 pm
Posts: 2216
Location: Walker, Louisiana
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Re: Loss of top end?
_________________
Ideas not coupled with action
never become bigger than the
brain cells they occupied.
Owner
DEEP SOUTH CUSTOM BOATS (225) 252-2700
Good boats ain't cheap, Cheap boats ain't good!
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| Thu Sep 30, 2010 6:59 am |
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bbb
MMT 1000 Club
Joined: Wed Sep 02, 2009 2:54 pm
Posts: 1554
Location: SW Georgia
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Re: Loss of top end? 10x5, 10x6, 10x11 GO-DEVIL PROPELLER
-STAINLESS STEEL
-AVAILABLE WITH HEAVY CUP
-SUPER WEEDLESS
-USED ON THE FOLLOWING
GO-DEVIL ENGINES:
10x9 - 9 hp Honda Crawfish Model with Clutch
10x4 - 31 hp Vanguard
10x6 - 35 hp Vanguard
-WARRANTY (see below)
-PRICE: $245
_________________
19x54 Seminole Extreme with a 35hp CDI GDSD. Mikuni. Marsh Mellow. Heads. Cam.
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| Thu Sep 30, 2010 9:43 am |
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b_coonass
MMT 1000 Club
Joined: Thu Mar 26, 2009 2:08 pm
Posts: 1229
Location: morgan city, louisiana
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Re: Loss of top end? Ok bb, yea i get u Dude!!! I dont care what it says on the GD website! I had the same prop before and I was running 23-24mph an aroun 3700-3900 RPM's!
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36hp Pro-Drive with EVT exhaust pushin a 17x42 custom skiff
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| Thu Sep 30, 2010 6:30 pm |
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cb5331
MMT Super Elite Member
Joined: Fri Dec 18, 2009 8:10 pm
Posts: 16915
Location: Rowlett, TX
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Re: Loss of top end? Sounds like you need to go find some sand 
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| Thu Sep 30, 2010 6:43 pm |
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jrp267
MMT Pro Member
Joined: Thu Jan 15, 2009 8:33 am
Posts: 83
Location: Wyoming, MN
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Re: Loss of top end? Except go devil changed the way they make there props and then changed the number for cup. So a 10x6 from before is no longer a 10 x6
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| Thu Sep 30, 2010 7:34 pm |
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b_coonass
MMT 1000 Club
Joined: Thu Mar 26, 2009 2:08 pm
Posts: 1229
Location: morgan city, louisiana
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Re: Loss of top end? This 31 is my second go-devil and I always have ran a bit bigger prop than what their rated for, and NEVER had this problem!
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36hp Pro-Drive with EVT exhaust pushin a 17x42 custom skiff
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| Thu Sep 30, 2010 8:13 pm |
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bbb
MMT 1000 Club
Joined: Wed Sep 02, 2009 2:54 pm
Posts: 1554
Location: SW Georgia
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Re: Loss of top end? Where is the old prop that was running 23-24? Might want to put it back on and see what the motor does.
If it's not the prop and it's not the throttle assembly, might be time for a leak down test.
_________________
19x54 Seminole Extreme with a 35hp CDI GDSD. Mikuni. Marsh Mellow. Heads. Cam.
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| Fri Oct 01, 2010 6:18 am |
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bloodorange
MMT Member
Joined: Wed Jan 28, 2009 8:36 am
Posts: 5
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Re: Loss of top end? Whats a leak down check? I am having the same problem with my honda 24 lt mudbuddy. Been running a 9x6 and right around 3500 rpms put on a new prop and now 3100 rpms. I am going to gps it this afternoon and see what kind of speed I am getting. I may have to go with a 9x5 prop. I am running it on a 16 48 war eagle.
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| Fri Oct 01, 2010 10:43 am |
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bbb
MMT 1000 Club
Joined: Wed Sep 02, 2009 2:54 pm
Posts: 1554
Location: SW Georgia
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Re: Loss of top end?
_________________
19x54 Seminole Extreme with a 35hp CDI GDSD. Mikuni. Marsh Mellow. Heads. Cam.
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| Fri Oct 01, 2010 11:33 am |
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b_coonass
MMT 1000 Club
Joined: Thu Mar 26, 2009 2:08 pm
Posts: 1229
Location: morgan city, louisiana
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Re: Loss of top end? After tightning the govonor screw its running a hell of alot better! Went huntin this mornin with 4ppl and gear, Ran 21mph!
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36hp Pro-Drive with EVT exhaust pushin a 17x42 custom skiff
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| Sat Oct 02, 2010 7:37 pm |
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