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| Help!!! https://www.mudmotortalk.com/mmt_v2/viewtopic.php?f=6&t=70187 |
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| Author: | Lee.Boy [ Sat Apr 01, 2017 1:23 pm ] |
| Post subject: | Help!!! |
Ok so I have a 9hp go devil frame but I have been given a 22hp predator motor which I can totally use on my 16' boat . will the frame and shaft handle the extra hp? I know I'll have to up the yoke on one side of the ujoint to 1" the shaft height is the same. |
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| Author: | brycecheramie [ Sun Apr 02, 2017 12:30 pm ] |
| Post subject: | Re: Help!!! |
Im pretty sure the PTO height on the 9hp and the 22hp are not the same. It will take some serious mods to the frame to handle the bigger motor. Balance will be different too so that will have to be modded. |
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| Author: | Lee.Boy [ Sun Apr 02, 2017 3:10 pm ] |
| Post subject: | Re: Help!!! |
The frame is 9hp someone put a 11hp Honda on it I've checked the specs and measured the heights there the same Sent from my XT1585 using Tapatalk |
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| Author: | brycecheramie [ Sun Apr 02, 2017 3:24 pm ] |
| Post subject: | Re: Help!!! |
Then go for it. you will need a new prop, and will need counter weight near the prop, to compensate for the heavier power head. |
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| Author: | Fuquabw2016 [ Sun Apr 02, 2017 3:49 pm ] |
| Post subject: | Re: Help!!! |
Did you get 22 hp mounted on the 9 hp frame ? |
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| Author: | Lee.Boy [ Sun Apr 02, 2017 4:49 pm ] |
| Post subject: | Re: Help!!! |
| Author: | Fuquabw2016 [ Sun Apr 02, 2017 5:04 pm ] |
| Post subject: | Re: Help!!! |
I got a 9 hp frame I'm wanting to mount a 23 Briggs on it trying to do some research before I ordered a motor and make sure it will fit first . |
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| Author: | Lee.Boy [ Mon Apr 03, 2017 9:24 am ] |
| Post subject: | Re: Help!!! |
| Author: | brycecheramie [ Mon Apr 03, 2017 9:42 am ] |
| Post subject: | Re: Help!!! |
| Author: | Lee.Boy [ Mon Apr 03, 2017 9:45 am ] |
| Post subject: | Re: Help!!! |
Cool ty brycecheramie definitely nice to reassured Sent from my XT1585 using Tapatalk |
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| Author: | brycecheramie [ Mon Apr 03, 2017 9:51 am ] |
| Post subject: | Re: Help!!! |
Im pretty sure they use 3/4" - 1" shafts or something close to that on the longtails. You'll be fine |
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| Author: | Lee.Boy [ Mon Apr 03, 2017 11:14 am ] |
| Post subject: | Re: Help!!! |
If I could pick ur brain im assuming I need a 9x6 prop what would be the results of running the 8x4 that's on it now Sent from my XT1585 using Tapatalk |
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| Author: | SETx Longtail [ Mon Apr 03, 2017 11:25 am ] |
| Post subject: | Re: Help!!! |
Too many RPM, no speed. You need to prop it according to Hp and typical load to get the right RPM at wide open in the water. |
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| Author: | Fuquabw2016 [ Mon Apr 03, 2017 12:52 pm ] |
| Post subject: | Re: Help!!! |
I talked to warren coco this morning about going from 9hp to 23 hp said it is possible but he said it would take some modifications. Cavitation plate angle needs to be changed, ribs on top on shaft added if it doesn't have it , change prop size and motor side yoke on u joint needs to be changed , and depending on motor your putting on it the pot shaft from motor maybe shorter and hard to line it up and make sure it's not rubbing on the bottom or top side of the shaft bushings . He said both motors use 3/4 inch shaft except when they build a 23 hp crawfish model it's a 7/8 shaft and double u joint said if it was a 58 inch long shaft and 3/4 diameter it broke them so they have to make them 7/8 and the double u joint helps with the vibrations the 7/8 shaft adds to it . So it can be done take some work and time figuring it all out right |
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| Author: | brycecheramie [ Mon Apr 03, 2017 1:59 pm ] |
| Post subject: | Re: Help!!! |
| Author: | Fuquabw2016 [ Mon Apr 03, 2017 5:38 pm ] |
| Post subject: | Re: Help!!! |
Yep and that's what he suggested I'll probly end up do that instead of modifying my frame and having to by motor and everything. |
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