doug43 Posted September 17, 2009 Share Posted September 17, 2009 (edited) Hi all, I was wondering if anyone knows about regulations relating to outboard motor hp ratings on small tinnies. I've got a 3.95 Quintrex Dart with a 15 hp and since fitting it out with ply platforms it is underpowered. I've tryed a mates 25 hp on the boat for a session and that was great but i'm thinking of putting a 30 hp yamaha 2 stroke on the boat... if only i had more space to store the boat i'd be upgrading the whole kit but i'm stuck with the Dart for now. Does anyone know if there are rules that relate to putting motors of this size onto tinnies of this size? Any help is appreciated. Doug. Edited September 17, 2009 by doug43 Link to comment Share on other sites More sharing options...
Blood Knot Posted September 17, 2009 Share Posted September 17, 2009 Mate I am no expert - but 2010 Quinny catalogue shows a 4 meter Dart OK for a Max 30hp ( max 90kg transom weight). You could probably assume a 30hp would be OK for your 3.95m. If in doubt check with Quintrex or one of their agents/dealers. John Link to comment Share on other sites More sharing options...
Young Gun Posted September 17, 2009 Share Posted September 17, 2009 Hi mate, my family owns 2 tinny's. A 3.8m bluefin and a 3.9m bluefin both with marine ply floors. They are excellent boats and have preformed well for us over a number of years. The 3.9 has currently got a 30hp Yamaha, with electric trim and also electric start. i cannot be sure on the exact weight of it but it pushes the 3.9 nicely. The 3.8 (my boat) has a 25hp Yamaha with electric start/manual tilt. Coming back to your case i would defiantly consult quintrex to be on the safe side. Also your transom will be weighted for a certain weight and hp. I know the quintrex and bluefin are not the same hull, but they would be fairly similar in weight and thickness. I think the 30 would be a perfect combination for your 3.95 dart. But double check with quintrex or a local agent. Hope this helps, Young Gun. Link to comment Share on other sites More sharing options...
cut_loose Posted September 17, 2009 Share Posted September 17, 2009 Hey mate are you thinking of getting a 2 cylinder motor or a 3 cylinder motor ??? The 2 cylinder is lighter at around 54 kg... The 3 cylinder model( alot better ) but weighs more.. not sure but i think its something like 10 - 20 kg Link to comment Share on other sites More sharing options...
a boat Posted September 17, 2009 Share Posted September 17, 2009 Hi Doug, if the boat is only rated to 25HP then legally that is all you can fit. If you are insured or in warranty you will not be if you fit a bigger HP than the capacity plate. If not insured and boat out of warranty it still is a grey area and if you had an accident and injured someone you will be in a bad situation. If it is rated to 30HP and you upgrade all 2-Cylinder engines are on par, but Yamaha with that 3 cylinder is a nice engine, but as mentioned heavier and dearer. Cheers, Huey. Link to comment Share on other sites More sharing options...
doug43 Posted September 21, 2009 Author Share Posted September 21, 2009 Thanks for all the help guys, I think i'll go for a two cylinder to keep the weight down and i'll definately check out the insurance side of things. Thanks again for the comments. Doug. Link to comment Share on other sites More sharing options...
Juggs Posted September 21, 2009 Share Posted September 21, 2009 i have the 3 cylinder 30hp yammy worth the extra imho very nice engine smooth acceleration bugger all fuel use weight was around 62kg from memory a 2 cyclinder yammy was about 56 Link to comment Share on other sites More sharing options...
deano2233 Posted September 22, 2009 Share Posted September 22, 2009 Mate i own a 395 dart and the max recommended hp is 30 in the specs and im pretty sure its on the builders plate. hope this helps cheers Deano Link to comment Share on other sites More sharing options...
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