davey buoy Posted July 10, 2011 Report Share Posted July 10, 2011 I have a pair of DOEL-FIN tabs to help plane out boat my boat. It's a 86 305 V8 mercruser inboard/outboard. If I install them do they make a noticeable difference?. There the model 185. Thanks for any help in advance, davey. Link to comment Share on other sites More sharing options...
Terry Posted July 10, 2011 Report Share Posted July 10, 2011 (edited) YUP they will get you up on plane quicker they will most likely lower your top end by 2 miles per hour Edited July 10, 2011 by Terry Link to comment Share on other sites More sharing options...
davey buoy Posted July 10, 2011 Author Report Share Posted July 10, 2011 YUP they will get you up on plane quicker they will most likely lower your top end by 2 miles per hour Thanks Terry, just wasn't sure if it would make that much of a difference. davey. Link to comment Share on other sites More sharing options...
Terry Posted July 10, 2011 Report Share Posted July 10, 2011 if you have a boat that gets up quickly you will not see any difference but if you have trouble getting it up, it will make a big difference but again they do take away some top end from motors that have trim/tilt Link to comment Share on other sites More sharing options...
misfish Posted July 10, 2011 Report Share Posted July 10, 2011 (edited) Heres a question for you. I only ask because,the boat I have,the owner never used the trim switch. When I took it out for a test run and used the trim,he said wow,that came on plane fast. Davey, if you like to go for a ride,Im very close.Lets see whats going on. Edited July 10, 2011 by Misfish Link to comment Share on other sites More sharing options...
craigdritchie Posted July 11, 2011 Report Share Posted July 11, 2011 Doel Fin works best on boats that are underpowered, or otherwise badly set up. As Terry said, they help you plane but eat a bit of top-end speed due to increased drag. You said the engine is a MerCruiser 305 - what's the boat? Link to comment Share on other sites More sharing options...
davey buoy Posted July 11, 2011 Author Report Share Posted July 11, 2011 Doel Fin works best on boats that are underpowered, or otherwise badly set up. As Terry said, they help you plane but eat a bit of top-end speed due to increased drag. You said the engine is a MerCruiser 305 - what's the boat? It's a Chris Craft scorpion 187. It has great top end, but with 4 guys and their gear fishing it's hard to get on plane. Misfish I use the trim button and the motor is always all the way down when taking off.Two in the boat and she planes within 10 seconds. I am also now running a 19pitch prop instead of a 21 which was very hard to get on plane. It is a 200 hp motor. Thanks for your help. davey Link to comment Share on other sites More sharing options...
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