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Need Help with Setting Mercury 25 4 Stroke
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<blockquote data-quote="shelbyladner" data-source="post: 473336" data-attributes="member: 25632"><p>I have a 1448 WeldBilt and recently swapped to a Mercury 25 4 stroke tiller w/CMC PT 35 unit. I went by the CMC instructions which say mount the unit with the top pivot slightly above the top of transom. The current mounting has the cavitation plate approx. 2 1/4" above the bottom of the hull. Is this too high? There seems to be a lot of talk about raising the O/B if setting it back via jack plate or bracket. The CMC unit sets O/B back approx. 6". It seems to have a lot of spray while on plane and when I trim the boat it does a lot of porpoising. I have moved battery to front and place as much gear forward but still porpoises severely. If I trim down then I get a lot of spray- it's almost like I need to mount even higher as it appears the cavitation plate is the cause of the spray. </p><p></p><p>Will lowering the O/B help reduce the porpoising?</p></blockquote><p></p>
[QUOTE="shelbyladner, post: 473336, member: 25632"] I have a 1448 WeldBilt and recently swapped to a Mercury 25 4 stroke tiller w/CMC PT 35 unit. I went by the CMC instructions which say mount the unit with the top pivot slightly above the top of transom. The current mounting has the cavitation plate approx. 2 1/4" above the bottom of the hull. Is this too high? There seems to be a lot of talk about raising the O/B if setting it back via jack plate or bracket. The CMC unit sets O/B back approx. 6". It seems to have a lot of spray while on plane and when I trim the boat it does a lot of porpoising. I have moved battery to front and place as much gear forward but still porpoises severely. If I trim down then I get a lot of spray- it's almost like I need to mount even higher as it appears the cavitation plate is the cause of the spray. Will lowering the O/B help reduce the porpoising? [/QUOTE]
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Need Help with Setting Mercury 25 4 Stroke
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