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Sea Ark 1648mv porpoising after upgrading to 40-HP mercury
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<blockquote data-quote="Huffduf41" data-source="post: 323151" data-attributes="member: 12352"><p>Hey guys I recently upgraded my Sea Ark 1648mv from a 25-HP mercury to a 40-HP. I originally had it mounted so the top of the motor "bracket" was resting on the top of the transom but it porpoised really bad. I moved it up two holes and it got better but still can't open her up without porpoising.</p><p></p><p>I have a full size trolling battery and cranking battery in the very back of the boat, they could be moved forward but it wouldn't be fun. I'd also need a new (larger) compartment up there.</p><p></p><p> The 40 was propped perfect for my 24' pontoon but now needs a different prop (rpms are too high). I'm not sure what prop it needs or if the correct prop would help the porpoising issue. Basically I'm a mess please help....</p><p></p><p>https://i1086.photobucket.com/albums/j447/huffduf41/IMG_20130721_202818_247_zpsb2395c46.jpg</p><p></p><p>https://i1086.photobucket.com/albums/j447/huffduf41/IMG_20130721_202401_699_zpsbe668518.jpg</p><p></p><p>https://i1086.photobucket.com/albums/j447/huffduf41/IMG_20130721_201920_234_zpscea19d68.jpg</p><p></p><p>https://i1086.photobucket.com/albums/j447/huffduf41/IMG_20130721_203139_607_zps6ef74a2e.jpg</p><p></p><p>https://i1086.photobucket.com/albums/j447/huffduf41/IMG_20130721_202608_781_zps01c8a538.jpg</p></blockquote><p></p>
[QUOTE="Huffduf41, post: 323151, member: 12352"] Hey guys I recently upgraded my Sea Ark 1648mv from a 25-HP mercury to a 40-HP. I originally had it mounted so the top of the motor "bracket" was resting on the top of the transom but it porpoised really bad. I moved it up two holes and it got better but still can't open her up without porpoising. I have a full size trolling battery and cranking battery in the very back of the boat, they could be moved forward but it wouldn't be fun. I'd also need a new (larger) compartment up there. The 40 was propped perfect for my 24' pontoon but now needs a different prop (rpms are too high). I'm not sure what prop it needs or if the correct prop would help the porpoising issue. Basically I'm a mess please help.... https://i1086.photobucket.com/albums/j447/huffduf41/IMG_20130721_202818_247_zpsb2395c46.jpg https://i1086.photobucket.com/albums/j447/huffduf41/IMG_20130721_202401_699_zpsbe668518.jpg https://i1086.photobucket.com/albums/j447/huffduf41/IMG_20130721_201920_234_zpscea19d68.jpg https://i1086.photobucket.com/albums/j447/huffduf41/IMG_20130721_203139_607_zps6ef74a2e.jpg https://i1086.photobucket.com/albums/j447/huffduf41/IMG_20130721_202608_781_zps01c8a538.jpg [/QUOTE]
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Sea Ark 1648mv porpoising after upgrading to 40-HP mercury
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