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| shaft and prop for inboard http://www.mudmotortalk.com/mmt_v2/viewtopic.php?f=41&t=69880 |
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| Author: | Tduffy08 [ Mon Feb 20, 2017 8:06 pm ] |
| Post subject: | shaft and prop for inboard |
making an inboard flatboat but can't find any aluminum props that are threaded. The only way i found to fix it was to get a stainless prop or find another shaft even though i have put many hours into searching for the right one. If anyone knows what i can do please help. The reason i want aluminum is because i would rather break the prop than the motor or shaft. It is more easily replaceable. The motor is a 18 hp duromax on a 12-15 foot flatboat |
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| Author: | redlined_b16a [ Thu Mar 16, 2017 4:34 pm ] |
| Post subject: | Re: shaft and prop for inboard |
Had plenty inboard mudboats,here is what I would do and what I have done countless times. Brass or stainless steel sub surface weedless propeller and a 3/4" or 1" shaft. You can either use a 3/4" shaft and let that be your week point Or rely on the coupling key to shear. I have never broke a crank,coupling or u-joint. Have lost props,bent rudders,broke shaft and sheared many cheap steel keys. I'd atleast want a 1" shaft if I was going to ride alot in stumps and unfamiliar territory. However its very hard to break a 3/4" shaft. There will be more screw on props avalible for 3/4" shafts. |
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| Author: | igotit [ Thu Apr 13, 2017 8:41 pm ] |
| Post subject: | Re: shaft and prop for inboard |
I agree with the above post,i used to run 3/4 shaft and 1" .....from 5 hp to 21 hp. Never broke a crank,coupling,universal.....or even a key. Tore up plenty brass wheels though,bent 1 shaft. That was about a 10 year daily use boat in stumps and mud. Personally id be more worried about the duromax holding up. Read that its the cheapest of the china clones. |
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