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| Long tail gear reduction https://www.mudmotortalk.com/mmt_v2/viewtopic.php?f=6&t=48621 |
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| Author: | jeff cox [ Thu Dec 26, 2013 6:47 pm ] |
| Post subject: | Long tail gear reduction |
Hi guys I'm wanting to start a new L T build in spring been thinking of putting a clutch on it so I had a few questions hoping you guys could give me some answers . do you use a lawn mower clutch ? how do you hook drive shaft up use a jack shaft of some kind ? do you change angle of shaft if using jack shaft and is it worth it thank you very much have learned a lot off this site Jeff |
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| Author: | Mark F. Cheney [ Sat Dec 28, 2013 10:18 pm ] |
| Post subject: | Re: Long tail gear reduction |
I think that it is way simpler to put a drive shaft reduction on a long tail than to build a short tail surface drive with its complicated transom mount. On my 7 HP models I am using a chain driven reduction with a wet clutch. I am hooking the UJ to the gear box PTO with no external jack shaft. There are good industrial centrifugal clutches out there that would work with a jack shaft as well. For my larger motors I use a centrifugal clutch and a jack shaft and then put in my regular compound UJ to the drive shaft. So far on my 14 HP motor I have used a BX belt from the clutch to the jack shaft. Mark F. Cheney |
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| Author: | jeff cox [ Sun Dec 29, 2013 3:30 pm ] |
| Post subject: | Re: Long tail gear reduction |
Thank you Mark at least that gives a starting point to think about |
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| Author: | brianb [ Sun Dec 29, 2013 6:18 pm ] |
| Post subject: | Re: Long tail gear reduction |
Mark please post some pics of your setups |
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| Author: | Cajunwannabe [ Sun Dec 29, 2013 8:20 pm ] |
| Post subject: | Re: Long tail gear reduction |
I'd like to see what exactly a jack shaft is too. I'd love to try a light 14 hp motor too Mark. My 25 hp gets the job don but it's a beast to drive. lol |
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| Author: | Mark F. Cheney [ Mon Dec 30, 2013 7:43 am ] |
| Post subject: | Re: Long tail gear reduction |
If this is any help - a 25 hp straight long tail turns a 9 x 7 prop. a 14 HP long tail with a 1 1/2 to 1 reduction thru a clutch and a jack shaft turns a 10 x 8 prop. I am working on some pictures now. Mark F. Cheney |
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