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8x4 prop is to big for my 9hp. Question is?
https://www.mudmotortalk.com/mmt_v2/viewtopic.php?f=41&t=19439		 Page 1 of 1
Author:  garjacker [ Tue Jun 21, 2011 7:37 pm ]
Post subject:  8x4 prop is to big for my 9hp. Question is?
I got an 8x4 prop for my 9hp lt and i cant get any rpms. Now i dont run mud and the prop has a heavy cup, question is if i remove the cup will this act as pitch removal or should i just work the diameter down or both to gain rpms?
Author:  pokey79 [ Tue Jun 21, 2011 7:46 pm ]
Post subject:  Re: 8x4 prop is to big for my 9hp. Question is?
thats the sandard size prop for a 9 hp so u might have oher problems like dirty carb or govonor out of adjustment or throttle cable stretched!!!!!
Author:  XGEN-DUCKMAN [ Wed Jun 22, 2011 12:00 am ]
Post subject:  Re: 8x4 prop is to big for my 9hp. Question is?
The 9hp briggs Vanguard we are building now is going to have a 7.5x4......
Author:  garjacker [ Wed Jun 22, 2011 4:03 am ]
Post subject:  Re: 8x4 prop is to big for my 9hp. Question is?
just built it. motor has 2 hours on it. on my 16hp i ran a backwater 9x6 and a gd 9x3 and they ran at about same rpm. the 9x3 has more cup. i dont know the maker of this prop but it is heavy made and more cup than my 9X3. does cup in a way = pitch? if i remove it how will it effect its performance?
Author:  pokey79 [ Wed Jun 22, 2011 6:43 am ]
Post subject:  Re: 8x4 prop is to big for my 9hp. Question is?
yes the cup on a prop stops the slip!!!! cup is like a tire with alot of rubber left vs. a bald tire!!!
Author:  pooldoo73 [ Wed Jun 22, 2011 2:03 pm ]
Post subject:  Re: 8x4 prop is to big for my 9hp. Question is?
Removing cup from a LT prop can have bad results. The cup on gdlt keeps the prop n the water. As the cup wears off the prop will come out of the water when running open water.
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