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| Did I go to big? http://www.mudmotortalk.com/mmt_v2/viewtopic.php?f=41&t=75278 |
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| Author: | FireManDan1027 [ Wed Sep 02, 2020 4:13 am ] |
| Post subject: | Did I go to big? |
I run a 35 hp Beavertail long tail on a 16’ Seminole Bateau. Just rebuilt everything from the motor back. Before I was running a worn out stock 9x6 Beavertail prop. I was turning it up to 4350 rpms solo and bass fishing rods, tackle, etc. running 21-22 mph and turning the same RPM but running 20-18 mph with another guy depending conditions. When I rebuilt everything I went with a 9x8 backwater prop. I took it gator hunting and with me, the wife, and brother in law, 55 quart knock off yeti I could hardy turn 3600 rpms. I understand that’s a good load and my brother in law was on the bow. I still have to do more testing. Solo runs, two guys, three or more play with weight distribution and what not. But thinking I either need to step down to a 9x7 or swap props depending on what I am doing and the load I am carrying. |
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| Author: | Gigafowl [ Wed Sep 02, 2020 5:30 am ] |
| Post subject: | Re: Did I go to big? |
Try a quick solo run with no gear - if it runs strong and fast with full RPMs you can eliminate a setup or mechanical issue... Each inch of pitch makes a pretty big difference though you are likely just a bit over pitched... |
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| Author: | FireManDan1027 [ Fri Sep 18, 2020 1:49 pm ] |
| Post subject: | Re: Did I go to big? |
I tried a 9 x 8 and a 9 x 6 and ran the same RPMs with both but lost 6 miles an hour between the two. I don’t know if the throttle linkage issue governor issue fuel as. But to not gain any RPMs and lose speed baffles me |
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| Author: | Will C [ Sat Sep 19, 2020 10:46 pm ] |
| Post subject: | Re: Did I go to big? |
Agreed u would be best to step down a bit, that 9x8 is a chunk of meat on a stock motor |
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| Author: | matttwad [ Mon Sep 21, 2020 11:31 am ] |
| Post subject: | Re: Did I go to big? |
No clue if godevil props are interchangeable with your set up but I have a 9x7 threaded godevil prop in my garage in good condition if you want to try it. Sent from my iPhone using Tapatalk |
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| Author: | Gigafowl [ Mon Sep 21, 2020 5:42 pm ] |
| Post subject: | Re: Did I go to big? |
| Author: | FireManDan1027 [ Tue Sep 22, 2020 7:54 pm ] |
| Post subject: | Re: Did I go to big? |
So I did some math and another test run The old prop I was turning 4350 RPMs and top speed was around 21 almost 22 mph New prop. Test run I did today was 21 but only at 3700 rpms. So same speed as my old prop less RPMs Before I was chasing speed but it’s a longtail.... I got two thoughts Run the 9x8 when I am fishing and want speed and usually solo Run the 9x6 or maybe step down to a 9x5 for when I really load it down hunting OR just spend the money on a surface drive |
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