Max engine size for 13' NRS raft w/ frame? - Mountain Buzz
 



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Old 09-02-2015   #1
 
fishingraft's Avatar
 
Wheat Ridge, Colorado
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Max engine size for 13' NRS raft w/ frame?

Looking at the NRS motor mount, but unsure of what size engine may raft can handle? I have a 9.9 Johnson on hand, but I'm not sure if the raft and frame can handle it.

I'm building a 13' NRS Outlaw into a framed fishing raft. Don't have anything other than the raft and engine right now, I'll slowly be building the frame over the coming months.

Also, if anyone has a frame for sale within the Great Lakes area, let me know!

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Old 09-02-2015   #2
 
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Denver, Colorado
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That'll be a fast raft.
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Old 09-02-2015   #3
 
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C. Springs, Colorado
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IMO...it can handle up to a 15 hp motor.....which is way overkill. 9.9 is doable. I put my 8 hp Johnson on my 12' Vanguard and the thing felt like a race boat. You'll want bow weight with a motor that heavy hanging off the back. Good luck.
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Old 09-02-2015   #4
 
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Wheat Ridge, Colorado
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Any tips on mounting an engine and anchor? Have any pictures on hand?
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Old 09-04-2015   #5
 
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Belgrade, Montana
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Driftboats and jetboats with motors and anchors usually have them on the opposite ends... so mount your anchor off the bow? or off the side of the raft. An effective river anchor needs to be heavy and could easily damage the motor, prop etc. so I'd lean towards front anchor rear motor.
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Old 09-05-2015   #6
 
Minden, Nevada
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Most good sized rafts and driftboats can handle 10 hp. There is no reason to run the motor wide open anyway. Since riverboats rarely have any keel or vee hull they quickly get squirrely on the water past about 8-9 knots. I used an outboard on a drift boat for many years with great success on both lakes and rivers. Catarafts are ideal for the use of an outboard motor.
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Old 09-05-2015   #7
 
Palisade, Colorado
Paddling Since: 1975
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While here in St.Helens OR for work I decided to modify my old 12" Achilles bucket boat so I could motor on the Columbia River and ocean bays; maybe catch salmon. So I came up with idea for transom / motor mount that would encircle the rear tube; fit it on before inflating. Had a guy at muffler shop fabricate the mount and also add to row frame so I could add wood side boards and really mount 2 more seats. Bought an 8 H.P. Honda 2 stroke long shaft motor on craigslist and took off for a trial run at Nehalem Bay. Worked pretty good but decided motor was too big; at about 1/3 throttle the prop would dig hard and want to draw under the raft, bending the tubes at rear cross tube. Swapped for a 4 H.P motor and I like it much better (also much lighter so mount / dismount is easy 1 man effort). A few photos...cheers
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Old 09-05-2015   #8
 
East of the Pine beatle, Colorado
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I agree that 15hp would be about the upper limit- 9.9 will be fine

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Old 09-05-2015   #9
 
Westminster, Colorado
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I'm pretty sure it could handle 40 or 50 horses. Make sure you GoPro.

Seriously though, use the 9.9 if you have it, or a 4 if you have access. My 6 on a cataraft pushed that plus 3 other rafts easily.
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