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Assignment America . . . Single vs. Twin Engine
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<blockquote data-quote="Pappy" data-source="post: 332091" data-attributes="member: 3278"><p>Kinda' two different scenarios going here plus small motors are way different than larger ones, performance wise. </p><p>If you want pulling power then go for two. If you want top speed stay with one larger one. </p><p>Rule of thumb is that if you want to pull a load then find a way to move a large column of water at a slow speed.</p><p>If you want to go fast move a small column of water at a high rate of speed.</p><p>With the twin 4s you will be able to pull more load and you just may get a hard to plane boat on plane.....who knows. </p><p>Will give you an example.</p><p>Was running a little Johnson 3hp I had just gone through. Had it on a 14' aluminum boat. If memory serves me correct it went something like 6.9 on the GPS (think I made a post of this somewhere) I put a second one on the boat and it climbed to just over 7mph. Not done yet, I put a third one on! Top speed was something like 7.4 or something. These little engines were limited (on this hull) by the prop and gear ratio. Only way they would have gone faster would have been on a narrow non-planing or displacement hull. Fun but totally meaningless.</p></blockquote><p></p>
[QUOTE="Pappy, post: 332091, member: 3278"] Kinda' two different scenarios going here plus small motors are way different than larger ones, performance wise. If you want pulling power then go for two. If you want top speed stay with one larger one. Rule of thumb is that if you want to pull a load then find a way to move a large column of water at a slow speed. If you want to go fast move a small column of water at a high rate of speed. With the twin 4s you will be able to pull more load and you just may get a hard to plane boat on plane.....who knows. Will give you an example. Was running a little Johnson 3hp I had just gone through. Had it on a 14' aluminum boat. If memory serves me correct it went something like 6.9 on the GPS (think I made a post of this somewhere) I put a second one on the boat and it climbed to just over 7mph. Not done yet, I put a third one on! Top speed was something like 7.4 or something. These little engines were limited (on this hull) by the prop and gear ratio. Only way they would have gone faster would have been on a narrow non-planing or displacement hull. Fun but totally meaningless. [/QUOTE]
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Assignment America . . . Single vs. Twin Engine
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