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    187 SunDeck struggles to plane

    BazilpointBazilpoint USAMember Posts: 4 ✭
    in Engine Discussions
    Any feedback appreciated...  New to boating and just purchased a 2015 187 Sundeck w/4.3 Mercruiser I/O.  Really like the boat but experiencing problems when trying to come out of the hole when loaded with more than 5 people,  Really struggles to plane and in some cases will not plane at all.   

    Just purchased and only have had in the water a couple of times.  I was always a little suspicious of how clean the 3 blade prop was (took off nicer prop added cheaper aluminum one...) but looked past it since I really like the boat.  After some research looking like I need a better prop (4 blade ?) or adding some trim tabs.  

    Question is what would be the best prop for this boat when the goal is to get out of hole quick and pull skiers.  Do not want to sacrifice top end speed but willing to if really helps initial planning of boat.  Also do trim tabs help? 


    Comments

    • guyfromohioguyfromohio Member Posts: 21 ✭✭
      Prop size and pitch wil make a huge difference.  Mine went from top-end 35 mph and dragging out of the whole to 45 mph and can get my fat but out of the water on skis.  I'd have a marina help you find right prop.
    • gmtkgmtk Member Posts: 15 ✭✭
      Had the same problem. Get some Nautilus trim tabs. Can install yourself. Instant improvement. Nauticus SX9510-80 Smart Tab SX Series Trim Tabs https://www.amazon.com/dp/B001DZ2VVC/ref=cm_sw_r_cp_api_e4vsBbP9NJPC6
    • bigbuka1bigbuka1 Member Posts: 41 ✭✭
      second smart tabs...works great!
      2012 Hurricane SD2000
    • steddyfrettersteddyfretter Member Posts: 14 ✭✭
      Have the 115 XA Yamaha on my 187. Had the same issue initially. By all means get the smart tabs like others have said. Literally jumps on plane now with people on board and stays there at lower speeds as well.
    • sullmatesullmate New Fairfield, Ct.Member Posts: 37 ✭✭
      switch to a smaller pitch prop. Should improve holeshot, as long as you don't overrev the engine. Get the part number off the current prop and check pitch. Top r p m should be around 4800 on an i/o.
    • BazilpointBazilpoint USAMember Posts: 4 ✭
      Finally decided on lowering pitch prop to 19.  Did the trick, pop out of the water 30% faster and can pull 6 ft good skier out on one ski.
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