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| RPM in water https://www.mudmotortalk.com/mmt_v2/viewtopic.php?f=6&t=49324 |
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| Author: | Quacksmackerdb007 [ Sun Jan 19, 2014 12:22 pm ] |
| Post subject: | RPM in water |
Hello guys. Newby here I just finished a 212 predator longtail like the stump jumpers. It is running around 37-3800 rpm out of water . What should the rpm be in the water? I am putting it on a layout boat that I built. It is basically 36"x11'. I put a hill 7x4 prop on it... Any input would be greatly appreciated Thank you |
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| Author: | SwampDonkey1 [ Wed Jan 22, 2014 1:37 pm ] |
| Post subject: | Re: RPM in water |
Should be anywhere from 3200-3800 |
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| Author: | Quacksmackerdb007 [ Wed Jan 22, 2014 4:31 pm ] |
| Post subject: | Re: RPM in water |
Thank you for the reply... I finally took it out and it ran about 28-2900 rpm in the water ... It pushed the boat about 11-12 mph. So my guess is that it is over propped ? I will prob end up ordering a 6.5x4 |
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| Author: | Trousertrout [ Wed Jan 22, 2014 4:37 pm ] |
| Post subject: | Re: RPM in water |
Pm duckystyle or ghetto. They have the same motor. Ask what prop they got |
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| Author: | Quacksmackerdb007 [ Wed Jan 22, 2014 4:41 pm ] |
| Post subject: | Re: RPM in water |
Thanks. I did pm duckystyle before I started the build but never got a reply. Ghetto has a hopped up engine and mine is still stock (for now) |
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| Author: | Quacksmackerdb007 [ Wed Jan 22, 2014 4:44 pm ] |
| Post subject: | Re: RPM in water |
Duckystyle had a great idea with the aluminum prop adapter... I should of did that to find the correct prop, then ordered the SS one |
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| Author: | SwampDonkey1 [ Wed Jan 22, 2014 10:05 pm ] |
| Post subject: | Re: RPM in water |
Just hop up that engine and get it to that rpm range, it can be done relatively cheap from some go cart sites, for just about the same as buying a new prop you could just get a kit and hop up your engine... hell if it blows up you can get another at harbor freight for $99 (with coupon)... |
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| Author: | DrahthaaRunner [ Thu Jan 23, 2014 12:05 pm ] |
| Post subject: | Re: RPM in water |
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