Outboards

Discussion in 'Dinghies' started by sarbog, Jan 11, 2018.

  1. sarbog

    sarbog Member

    135
    Aug 22, 2008
    Emerald Isle NC
    '05 340 Sundancer
    Garmin 7610xsv
    1951 Penn Yan 9' Aerodinghy/2018 AB 9vl w/ 15 hp Evinrude 2-strk
    Twin 8.1 Horizons v-drives
    So, I made the decision on dinghy and davit system. Placed deposit on an AB 9 vl (9.6’, 106 lbs.). Hurley H2O davit system with 36” arms.
    The boat is rated for 15 hp max. but “manufacturer recommends 10hp” which means 9.9. Can someone explain why this recommendation for using less hp.?
    The difference in weight on the engines I am considering is only about 10 lbs, 84lbs. Vs 94 lbs., if I recall correctly. Price differential is about $550.
    I don’t want something I really don’t need but also don’t want to find myself wishing for more in the hp. department.
    My use is primarily 2-4 people going to marina from a mooring or to the beach from anchorage (100 yd trips). I guess I might use the dinghy on its own (I have a trailer) to run to shoal islands, etc., on days we just feel like messing around in the ICW.
     
  2. juggernaut1

    juggernaut1 Active Member

    829
    Apr 19, 2015
    Perth, Western Australia
    2006 38 Sundancer
    8.1S / ZF 63V Drives
    Provided your happy with the weight difference go the most hp you can (15 hp in your case). I presume the lower hp is for max service life and lower weight. My 9.6 came recommended with a lower hp than the max too.
     
  3. NotHerDecision

    NotHerDecision Well-Known Member

    Jun 28, 2016
    Houston, Texas
    2001 Sea Ray 460 Sundancer
    2014 Seadoo 155 LTD
    2105 Seadoo 130 SE
    2013 Mercury Dinghy
    Cummins 6CTA 8.3L
    Get the max rating. I’ve never heard this boat has too much hp.
     
  4. quality time

    quality time Well-Known Member

    Oct 30, 2007
    Upper Chesapeake Bay
    2003 480DB and Kencraft 190 CC
    QSM11's
    Definitely get the 15HP. It will cost more than $550 to upgrade once you realize it doesn't do what you want. I have a 10'2" with a 15HP 2 stroke and it does 22MPH with two adults and two kids.
     
  5. ZZ13

    ZZ13 Well-Known Member GOLD Sponsor

    Nov 25, 2009
    Lady's Island, SC
    2001 400 Sedan Bridge
    Cummins 450 Diamond
    That'll be a lot of weight to hoist up onto the H2O. I have an H2O with probably about 50 lbs less than that on my 8'6" aluminum rib and 6hp motor. My swim platform is just barely above the waterline which also helps. It's about the limit for me to pull up the dingy on my own. Hopefully you are big, strong, or have platform that lowers down or have a helper to pull it on.
     
  6. Creekwood

    Creekwood Well-Known Member GOLD Sponsor

    Apr 26, 2009
    Oakville and Georgian Bay, Ontario
    '97 330 Sundancer, Raymarine C80 suite with radar, Mercury 310 Hypalon w/8hp Yammie 2stk
    2X 454 carbs w/ vDrives
    The difference in weight between a 9.9 and a 15hp 2 stroke is not much but the power diff is huge. 9.9 will be enough for short trips but if you need to go 20 mph for longer trips with the dinghy full of people you will want 15.
     
    quality time likes this.
  7. Rocket

    Rocket Member GOLD Sponsor

    557
    Jan 14, 2008
    Long Island NY
    2007 48 Sundancer
    Previous: 2004 420DA, 2007 320DA, 2006 240DA
    Cummins QSC 540 8.3
    I have the similar (10VL with 15 HP) with the H20 Davit. You will definitely need 2 people to pull this up with their winch as well. Not as easy as you think, I believe you have a high platform 20" plus off the water.
     
  8. JVM225

    JVM225 Well-Known Member

    Apr 8, 2008
    Farmingdale, NY
    2002 410 Sundancer, Monaco Edition.
    3126 Cats.
    I’ve got a 130 lb. 10’6” and 9.9 4 stroke Mercury. It will move nicely with two people on it if one sits on the bow to keep it down.
    I bought both brand new last winter.
    IMHO: The 4 stroke motor is too heavy for the boat.
    It’s a PIA with one because the bow comes all the way up and the stern digs too far down. Sitting all the way forward and stretching to reach the tiller helps but is very uncomfortable.
    At the end of the season I ordered a different pitch prop but haven’t tested it yet.
    If I were to do it all over again I would look around for a good used 2 stroke rather than buying the new and much heavier 4 stroke.
    I think the 4 strokes are too heavy for the inflatables.
    I’d probably opt for a smaller and lighter inflatable too.
    I’ve got a set of “Dinghy Ramps” that my current combo fits nicely on but it’s really heavy and two strong people are definitely needed to pull it up. It’s enough of a PIA to run and to get on and off of my platform that I mostly leave it back at the dock.
    Honestly, if you aren’t looking to speed around, you’re probably best off with the lightest boat and motor that will suit your needs. I think the lighter 2 strokes are the way to go.
     
    Last edited: Jan 12, 2018
    mjoplin and joeyleggz like this.
  9. Stee6043

    Stee6043 Well-Known Member

    Jun 1, 2015
    West Michigan
    1997 Sundancer 400
    7.4L Gassers
    From a guy using a 3.5hp on a 10'6" dinghy ferrying a family of 5 - get the 15hp if they are that close in weight but also don't plan on being able to manage the dinghy yourself.

    I love being able to toss my 4 stroke around single-handed but man am I slow. Good thing we're never in a hurry. It's a one beer trip into town on the backwaters. Well....sometimes two. Slow and steady.

    If you want to be able to easily handle the dinghy yourself I'd say that 10hp will even be too much for a platform 20" off the water. Mine is about the max I can handle and my platform is a lot closer to the water than yours.
     
  10. sarbog

    sarbog Member

    135
    Aug 22, 2008
    Emerald Isle NC
    '05 340 Sundancer
    Garmin 7610xsv
    1951 Penn Yan 9' Aerodinghy/2018 AB 9vl w/ 15 hp Evinrude 2-strk
    Twin 8.1 Horizons v-drives
    The totals weight of boat and 15hp would be just shy if 200 lbs. 9.9 only saves 10lbs. My platform is just over 20” above the waterline. I never single hand the boat so there is always at least 1 and usually 3 others aboard for loading on the H20. I am a pretty strong and fit 62 yo who runs and lifts regularly (230 lb. retired Marine), heck I deadlift way more than 200 lbs. Still, it does concern me being able to load onto the davits with a modicum of ease with the 36” Davit arm. For a number of reasons I don’t really want to go to the H30 and a winch.
     
  11. Gary B

    Gary B Member

    174
    May 20, 2015
    Long Island
    2007 52 Sedan Bridge
    Cummins QSM 11
    We have a 10'6" fiberglass floor AB inflatable. Originally we had a Yamaha 9.9 2 stroke on it and it rode well. After getting the raft I had the hp increased on the 9.9 Yamaha to 15 hp and its a huge difference!
    I agree with the earlier comments that you should look for a good used 2 stroke. It might take a few months but if you can find a 15 hp 2 stroke it's the same weight as the 9.9 so go for the extra ponies. You won't regret having the extra hp especially when you have 4 people and gear aboard it.
     
  12. sarbog

    sarbog Member

    135
    Aug 22, 2008
    Emerald Isle NC
    '05 340 Sundancer
    Garmin 7610xsv
    1951 Penn Yan 9' Aerodinghy/2018 AB 9vl w/ 15 hp Evinrude 2-strk
    Twin 8.1 Horizons v-drives
    Thanks all for the advice. I have located a 1989 15 hp 2-strk Evinrude. Just serviced and runs well. 20 lbs lighter than a 4 strk! I also checked with mechanics and parts readily available and easy to work on.
     
    JVM225 likes this.
  13. NotHerDecision

    NotHerDecision Well-Known Member

    Jun 28, 2016
    Houston, Texas
    2001 Sea Ray 460 Sundancer
    2014 Seadoo 155 LTD
    2105 Seadoo 130 SE
    2013 Mercury Dinghy
    Cummins 6CTA 8.3L
    That’s a needle in a haystack! Congrats on the find
     
  14. rmlsll

    rmlsll Member

    148
    Oct 11, 2009
    Saugatuck MI / Cape Coral FL
    340 Sundancer 2004 /
    240 Sundeck 2007 /
    10' Zodiac
    Twin 8.1 merc,. V-Drive /
    5.0 merc., bravo 3
    I have a 10' RIB w/ a 15hp 2 stroke. I installed maxi marine lifters on it (best hundred bucks I've spent ) I also built my own swivel davit w/ a worm winch that I drive with a battery drill.
     
  15. JVM225

    JVM225 Well-Known Member

    Apr 8, 2008
    Farmingdale, NY
    2002 410 Sundancer, Monaco Edition.
    3126 Cats.
    That’s a great find!
     
  16. Creekwood

    Creekwood Well-Known Member GOLD Sponsor

    Apr 26, 2009
    Oakville and Georgian Bay, Ontario
    '97 330 Sundancer, Raymarine C80 suite with radar, Mercury 310 Hypalon w/8hp Yammie 2stk
    2X 454 carbs w/ vDrives
    Ditto. Highly recommend the Maxi Marine lifters. Here is a video of my RIB with me at 220 lbs and my son at about 160.
     
  17. sarbog

    sarbog Member

    135
    Aug 22, 2008
    Emerald Isle NC
    '05 340 Sundancer
    Garmin 7610xsv
    1951 Penn Yan 9' Aerodinghy/2018 AB 9vl w/ 15 hp Evinrude 2-strk
    Twin 8.1 Horizons v-drives
    The Evinrude 15 hp 2 strk is only 74 lbs. That keeps total weight of boat and motor at 180 lbs. I’m comfortable loading that, and as I noted, it would be rare (if ever) I’d be loading by myself.
     
  18. b_arrington

    b_arrington Active Member

    605
    Feb 21, 2007
    Setauket, NY
    270 Amberjack (2006)
    AB Ventus 9 VL RIB
    350 Mag MPI Horizon w/ BIII
    1998 Envinrude 15 HP 2-stroke
    You're going to be very happy with that combination. I have the same dingy with a 1998 15 hp 2 stroke Evinrude. With just me the boat flies at 25 mph. I can carry me and my 2 kids and still plane. I use it to tow the kids in a tube all summer.

    I think the recommendation for a 10 hp has to due with the weight of current 4 stroke engines. More strain on the transom and the stern tends to sink down, making it harder to get on plane. I was lucky to find a 2 stroke engine, because I think it would be very hard to regularly mount / dismount a 15 hp 4 stroke.
     

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