Boat Pulling Away From Trailer Roller…

Discussion in 'Trailering' started by MonacoMike, Oct 11, 2021 at 11:06 AM.

  1. MonacoMike

    MonacoMike Well-Known Member

    Sep 15, 2009
    Indiana lakes and Lake Michigan
    2000 Cruisers 3870
    8.2 Mercs
    85 Sea Ray Monaco 197
    260hp Alpha 1
    So I have a 30 foot boat, a tandem trailer that appears to be properly sized and fitted for the boat but when I load the boat on the trailer, and I went straight up so tight the strap was creaking, when I pulled it up the ramp the boat ends up about an inch and a half to 2 inches away from the bow roller.

    The launch is not a particularly steep ramp. It has me puzzled as to why this happens. anyone had an issue like this before and figured out how to correct it?
     
  2. JimG

    JimG Well-Known Member SILVER Sponsor

    Nov 4, 2008
    Southern WV
    2007 310 DA
    Kohler 5ECD
    Twin 350 Mags
    Raw Water Cooled
    V-Drives
    Mine does that also... nothing I can do about it.
     
    MonacoMike likes this.
  3. 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
    Its because the stern is floating slightly when the trailer is backed in the water. So you crank it tight to the bow roller, but as the stern drops when you pull out, the bow tilts away from the roller. Its hard to avoid and with large boats on bunks, impossible to fix after you pull out.

    There is another thread going on here that shows a lower mounted bow stop and a pull down turnbuckle that I think would be a great solution to this problem since the low bow stop will not tilt away as much when the stern settles.
    Take a look at @HawkX66 post #6.
    clubsearay.com/index.php?threads/options-for-bow-stop-catch.106535/
     
  4. Lazy Daze

    Lazy Daze Well-Known Member TECHNICAL Contributor GOLD Sponsor

    Apr 21, 2009
    PA
    Various
    Various
    Yup, floating stern. The only other reason could be a strap that isn't wound tight enough, but it doesn't sound like that's the case, here. With smaller boats, you can jamb on the brakes and get the boat to slide forward - but with heavier boats, you won't be able to stop fast enough to get that to happen.
     
    MonacoMike and Nater Potater like this.
  5. Juliery

    Juliery Active Member

    298
    Sep 26, 2020
    Comox, B.C.
    1993 Sea Ray 290 Sundancer
    Galvanized triple axle Road Runner trailer
    7.4 Mercruiser w/ Bravo 2
    My 30' boat is the same and I don't imagine it's an issue. I drop a narrow, plastic felling wedge into the gap, though - just because.
     
    firecadet613 likes this.
  6. Sundancer

    Sundancer Well-Known Member

    Jul 20, 2005
    Prosser, WA
    33 year old CLASSIC 300 DA, towed almost anywhere behind the Duramax Dually Crew Cab.
    16 cyl, 700 cu. in./Alpha I's
    Same issue when loading my 30 footer each time. You get used to it! It's actually not bouncing on the roller up there so that could be a good thing, I'm not sure. I still have it secured with chain, so it's not moving any farther.
     
    Last edited: Oct 11, 2021 at 7:43 PM
  7. MonacoMike

    MonacoMike Well-Known Member

    Sep 15, 2009
    Indiana lakes and Lake Michigan
    2000 Cruisers 3870
    8.2 Mercs
    85 Sea Ray Monaco 197
    260hp Alpha 1
    I believe in my situation it is causing the frame to flex. If the boat is supported by the rear bunks the keel support and the bus stop it makes the trailer very rigid, but if it is only on the bunks and the key will support it causes the trailer to flex a little in the middle, which is what I don’t like about the situation.
     
  8. Lazy Daze

    Lazy Daze Well-Known Member TECHNICAL Contributor GOLD Sponsor

    Apr 21, 2009
    PA
    Various
    Various
    Run a chain/turnbuckle from the bow eye down to the trailer frame.
     
    MonacoMike likes this.
  9. MonacoMike

    MonacoMike Well-Known Member

    Sep 15, 2009
    Indiana lakes and Lake Michigan
    2000 Cruisers 3870
    8.2 Mercs
    85 Sea Ray Monaco 197
    260hp Alpha 1
    BTW, I towed my 270 Sundancer for years and never had this problem on that trailer.
     
  10. Carver370

    Carver370 Well-Known Member

    Mar 30, 2007
    New Buffalo Michigan
    2000 Sea Ray 400 Sundancer - Diesel
    Twin 3116 Cats - 350 HP
    The local ramp doesn't like it, but your only option is to pull the trailer out a little further than you need to and then power up on the trailer so you are at less of an angle.
     
  11. boatman37

    boatman37 Well-Known Member

    Jun 6, 2015
    pittsburgh
    2006 Crownline 250CR. 5.7 Merc BIII
    Previous: 1986 Sea Ray 250 Sundancer. 260 Merc Alpha 1 Gen 1
    5.7 Merc BIII
    I just pulled a dock neighbors 25' Wellcraft tonight and ran into the same issue. Looked good so pulled up and there was a gap. Tried 3x. Had him power it up then I cranked the winch while he held power on and it was good after that.

    BTW-here is my turnbuckle setup. Had it on my last boat so set it up on this one too.

    [​IMG]
     
  12. wyrman

    wyrman Well-Known Member

    Jul 12, 2012
    Tri-Cities, Wa
    2007 310 Sundancer
    Twin 350's, V drives
    1994 18' Bluewater bowrider
    Mine does it too. The trailer manufacturer told me it would until the strap tightened up, but it still does it.
    Mine slips 6-8 inches back, luckily my bow stop is adjustable, so I can adjust it back up to the bow.
    I also added a turnbuckle on mine. I have it set up a little different than the ones posted. I'll see if I have a pic of it.
     
  13. wyrman

    wyrman Well-Known Member

    Jul 12, 2012
    Tri-Cities, Wa
    2007 310 Sundancer
    Twin 350's, V drives
    1994 18' Bluewater bowrider
    Boat.jpg
     
  14. ColoSR

    ColoSR Active Member

    368
    Apr 25, 2018
    2003 Sea Ray Sundeck 220
    MX 6.2L MPI Mercruiser with 2.2 Bravo III drive
    My winch lets a couple inches of slack out unless I crank it all the way in and then reverse the latch back into the teeth of the gear. That keeps it nice and tight.
     
    techmitch likes this.
  15. Woody

    Woody Well-Known Member PLATINUM Sponsor

    Nov 20, 2007
    N. Wisconsin/Lk Superior
    2005 420DA
    Cummins 6CTA8.3
    There'd be a gap on my 280DA most the time. The boat was always in the same spot at the end of a tow as it was when I started so I didn't worry about it. It was a bunk trailer.
    Eagle Trailer.JPG
     
  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
    I think that style of trailer is the best. The keel is well supported and the side bunks give stability. Needs to be set up perfectly if its not OEM for the exact boat, but once set up, they are great. I hate when I see larger boats on trailers without any keel support and only two bunks under strakes.
     

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