camoh Posted January 5, 2014 Share Posted January 5, 2014 After someadvice I have a 3.6m quintrex dart with a 15hp evinrude looking to upgrade with a 25hp mariner I have. Would I have to reinforce the transom to upgrade? One the mariner have to replace the impeller on motor have a rough idea what to do any tips or things to watch out for? Thanks in advance Cam Sent from my GT-I9305 using Tapatalk Link to comment Share on other sites More sharing options...
rockfisherman Posted January 5, 2014 Share Posted January 5, 2014 I don't think you'd have to upgrade, but that's just an opinion. If you have the tools and a little know how, changing an impeller is fairly straight forward. There's some good clips on YouTube. Can't remember exactly how much it cost but I had to replace the impeller housing also because it had been heat damaged from being run with out water ( forgot the muffs on, next time went out, started motor and muffs were still on). Harry If it's to good to be true, it usually is... Link to comment Share on other sites More sharing options...
chr42is Posted January 5, 2014 Share Posted January 5, 2014 I had a 335 dart, and found that after fitting a casting deck, elec. motor + battery that 15HP was not enuf. Swapped it for a20HP Yamaha ($1000 + 15 HP Yamaha) and all good. Had to put about 60mm spacer under the new motor to get it to the correct height on the transom. Link to comment Share on other sites More sharing options...
Guest Aussie007 Posted January 5, 2014 Share Posted January 5, 2014 After someadvice I have a 3.6m quintrex dart with a 15hp evinrude looking to upgrade with a 25hp mariner I have. Would I have to reinforce the transom to upgrade? One the mariner have to replace the impeller on motor have a rough idea what to do any tips or things to watch out for? Thanks in advance Cam Sent from my GT-I9305 using Tapatalk that boat might only be rated to 20hp, might be ok if your mariner is a 20-25hp version but could be the 25-30hp version and you'll avoid your insurance how come u want to upgrade? Link to comment Share on other sites More sharing options...
camoh Posted January 6, 2014 Author Share Posted January 6, 2014 Rello borrowed motor a while ago finally got it back just sitting there dont mind if I have to beef transom up pretty keen to put it to use and get around abit quicker Sent from my GT-I9305 using Tapatalk Link to comment Share on other sites More sharing options...
Guest Aussie007 Posted January 6, 2014 Share Posted January 6, 2014 Rello borrowed motor a while ago finally got it back just sitting there dont mind if I have to beef transom up pretty keen to put it to use and get around abit quicker Sent from my GT-I9305 using Tapatalk do u read the marine rescue post on FR about people being rescued?, i remember reading one only a couple of weeks ago and a major percentage of boating accidents are from over powered vessels i reckon the manufacturer does a good job of maximum HP ratings for boats, they keep it safe and within the boats limits, going from a 15hp to a 25hp is a big difference its almost double the HP and some 15hp engines are 250cc and a 25hp is 430cc i wouldnt do it Link to comment Share on other sites More sharing options...
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