Does my boat look right on this trailer?

Discussion in 'Trailering' started by boatman37, Jun 29, 2019.

  1. 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
    So I know it isn't a SR but bought this boat in August with a brand new Venture trailer. The first time we tried to launch this year we had trouble so pulled it back on the trailer as best we could and came home. Couldn't get it as far forward as it should have been but knew it was going right back in and I tied it down with every strap I had. The boat was about 4" back from where it should have been. When I got home I unhooked it and had the trailer sitting level. Noticed the bow bounce upwards every time my step-son was near the back of the boat. I grabbed the coupler and could actually pick the front of the trailer up by hand. We ended up jacking the boat up and cranking it forward the 4" before I towed it again. But after looking at pictures it does seem like there is alot of weight towards the back of my trailer. I don't have any scales near me to weigh it but have seen pics online of the same model boat on a Venture tandem axle trailer and it is about 12" further forward than mine. Not sure if it is the same model trailer but it was a 2016 same as mine.

    Anyway, my bow stop can't go forward unless I move it about 10" in front of the V on my trailer. That would be fine as there is alot of trailer sticking out of the front of the boat. I would have to move my bunks forward about the same distance as my boat has a slight wedge down at the back so I don't think the bunks should stick out past my transom?

    The trailer tows fine both with my old 1500 and my new 2500. I am going to try to figure out a way to get an accurate tongue weight but the only way I can make an adjustment is with the boat off the trailer so was figuring I'd at least get it better for now then hopefully get an accurate weight when I pull the boat out this fall.

    Thoughts on these pics?

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  2. NorCal Boater

    NorCal Boater Well-Known Member SILVER Sponsor

    Jan 24, 2008
    Covington, LA
    Cobalt CM23
    GM SB 383" Stroker" Alpha Gen I
    At first look the trailer appears to be too short for the boat. You may need to take the boat and trailer to a large boat dealer that has a lift and they can pick the boat up and place it properly on the trailer....if it will fit. As far as moving the winch post forward 10", you appear to have more boat than that hanging over the back end of the trailer. My winch post sits forward of the "V" on my trailer.

    Your tongue should be 10% of the total weight of the boat and trailer. If you can lift it, it's set up wrong. I'm guessing you are somewhere around 7-8,000 lbs. towed weight. You need to get that corrected before you tow too far. If that starts to fishtail on you, you could lose you boat, truck....and your life.
    Shawn
     
  3. Korkie

    Korkie Active Member GOLD Sponsor

    579
    Feb 2, 2016
    Leonardtown, MD Potomac River / Chesapeake Bay
    340 Sundancer 2006, Garmin 7612, xHD Radome
    Merc 496 Mags
    Bravo III Drives
    Move the winch post forward. You need more weight over the axles and forward on the tongue. As long as the trailer is rated for the weight of the boat, and it appears it is, should work out well. Try and get it as far forward as you can to even up the stern with the end of the trailer. It will pull much better also.
     
  4. scoflaw

    scoflaw Well-Known Member

    Aug 10, 2011
    cape cod mass, cape coral fl
    1999 Powerquest legend 260 sx
    502 mpi Bravo 1
    your trailer is too small for your boat.
     
  5. Maggieiscrazy

    Maggieiscrazy Active Member

    261
    Oct 14, 2016
    Northern Wisconsin
    240 Sundancer
    5.0. Bravo III
    The bunks on my trailer stick out about 2 feet beyond the transom.
     
  6. Last Dollar

    Last Dollar Member

    210
    May 10, 2011
    Huntington WV boating the Ohio River and lakes in
    Sea Ray 225
    5.0 Mercruiser
    My Venture trailer looks to be identical to yours and I haul a 225 Sea Ray Weekender. You may move the winch stand in front of the V where the sides join together but I would check with Venture first to see if this is recommended. You really need to get the boat forward and get at least 10% tongue weight as recommended by another person. My bunks are even with the back of the transom. I pull the boat tightly against the winch stop and tie down the bow with a turn buckle like yours. I think the defining part of this issue is the capacity of the trailer. You should have a sticker on the frame giving you the capacity. Mine is model VATB 5925 with a GVWR rating of 6925 lbs. Also the tires are a big worry!! Nearly all ST tires are made in China and not worth a crap !!!! Get yourself a set of Goodyear Endurance made in America. I had a blow out last week on two year old China Bombs and now have the Endurance on the trailer! I don't know what your boat weighs but mine is about 4800lbs. Before trying to make this boat fit the trailer you need to be sure the capacity of the trailer can handle the weight.
     
    iBoat Skipper Doug likes this.
  7. 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
    Thanks. I checked on the trailer when I first bought the boat. The trailer weight is 1300lbs. The GVWR is 8525lbs. My boat dry weight is about 6700lbs. I'm figuring loaded I'm around 8500-9000lbs give or take. According to Venture this is the correct trailer for my boat but I know if it is it is just barely enough. The trailer VIN starts with 47GAC272. The boat is a 2006 Crownline 250CR. FWIW the trailer was bought by the previous owner right before they put it up for sale. I probably would have went with a tri-axle or at least a beefier tandem.

    My thoughts were to either move the axles back or move the winch post forward and given I have so much of the trailer sticking out past the front of the boat moving the winch post forward makes more sense. I could even move it more than 10" if needed but 10" is about the minimum I can move it since the V on the trailer meets right there. I saw a pic of the same boat on a 2016 Venture trailer that looks to be identical to ours and it was about 12" further forward than ours. A guy at our marina has the same exact boat with a Crownline trailer and his bunks stop before the transom too. There is a little angle on the bottom at the transom so I'm not sure the bunks should extend all the way back?

    The boat doesn't bounce when it's on there properly with the bow eye up against the stop but when I tried to launch the first time it wouldn't stay running and my winch gear stripped trying to crank it all the way up. I have since fixed the winch. When it was bouncing it was about 4" away from the stop. That's when I was able to lift the front of the trailer. After getting the boat up against the stop I can't even budge the front of the trailer but know it still has to be too light.

    The marina they stored the boat at ordered the trailer and set it on it. When I took it for a sea trial that was the first time that trailer had been on the road. My 1500 was rated to tow 8600lbs so I bought a 2500 a couple months ago. A new trailer isn't in the budget right now, especially with our sons wedding coming up in October...lol.
     
  8. Steve Craig

    Steve Craig Member

    436
    Jul 26, 2011
    Saint John, N.B.
    '07 260 Sundeck
    6.2l & Bravo III
    Trailer & truck capacity may be ample based on the boat weight, however, trailer looks too short. Also keep in mind the truck(s) you choose have trailer ratings "when properly equipped".
    All the mass from your engine & drive are way behind the axles. Ideally I would get them forward a good foot or two. Too much weight behind the axles can lead to some serious trailer sway. I haul mine on a Venture VAT7950 with an F150. Boat is a little lighter and the trailer is a little longer than yours. I have a Reese weight distribution set-up designed for boat trailers with long, pole style yokes. Very good balance on the highway, trailer & truck are both level.
     
  9. bobeast

    bobeast Dance the Tide SILVER Sponsor

    Oct 22, 2017
    Isleton, CA
    2002 310DA
    350 MPI w/V-drives
    If you are unable to achieve 9 - 15% tongue weight with the boat all the way forward, the trailer is too short. Having too little tongue weight can cause a tendency to sway dangerously.

    Just to use round numbers, for a 10000 lb GTW (boat + trailer), the weight on the tongue should be in the 9 - 1500 pound range. If you are able to pick up the tongue by hand, your weight is way too far back.

    edit: The above numbers are for typical trailers. Apparently the 'experts' agree that the tongue weight for a boat on a trailer can be as low as 7% of total weight. (not sure what is different)
     
    Last edited: Jun 29, 2019
    susanandlance likes this.
  10. 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 will start with moving the winch post forward about 12". I will also have to move the bunks forward about that same amount. My bunks stop about 6" from my transom but that is right where the angle starts at the back of my hull. If it weren't for that angle I could probably leave the bunks where they are and they would stick out a little past the transom. Doing that should put the rear of the trailer frame just about even with the transom and still have plenty of room between my anchor and my tailgate.

    Just re-checked the NADA site and it says net weight for my boat is 6600lbs so that and the trailer puts me at 7900lbs
     
  11. bobeast

    bobeast Dance the Tide SILVER Sponsor

    Oct 22, 2017
    Isleton, CA
    2002 310DA
    350 MPI w/V-drives
    Sounds like a good plan, but make sure you add to that 6600, the weight of fuel, water, gear, etc. when doing your calculations. Assuming 100 gallon fuel load, for example, that would add another 600 pounds.
     
  12. Lazy Daze

    Lazy Daze Well-Known Member TECHNICAL Contributor GOLD Sponsor

    Apr 21, 2009
    PA
    Various
    Various
    You definitely want to get more tongue weight - that you already know. By the way, boat trailer manufacturers typically recommend 5%-7% - at least that's what all of the higher end manufacturer's I've ever talked to about this say. When we setup a trailer, we look for that number as well... all has been good doing it that way for quite a few decades, now! If you can get to that, you're good. You can use a bathroom scale, some scrap wood and some basic math. If you google for that, you'll find some info on that.

    Generally speaking, having bunks stick out past the hull is not recommended if you have trim tabs. Without trim tabs, it makes no difference. As long as the bunks are long enough to still support the hull enough.

    You can also move the axles - that's a somewhat common thing to have to do.
     
    Last edited: Jun 29, 2019
  13. Last Dollar

    Last Dollar Member

    210
    May 10, 2011
    Huntington WV boating the Ohio River and lakes in
    Sea Ray 225
    5.0 Mercruiser
    you've done all the researching and looks like you can make this trailer work. Trailers are very limber with no boat attached. If you snug the bow tightly against the bow stop roller and put the turn buckle on you are good to go. The boat sitting on the trailer is what makes the trailer rigid........providing it is snug against the bow stop roll.
     
  14. Gofirstclass

    Gofirstclass Well-Known Member

    Apr 20, 2010
    Tri Cities, WA
    1995 550 Sedan Bridge,
    2010 Boston Whaler 130 Super Sport,
    1981 Boston Whaler 130 Sport,
    CAT 3406C's, 580hp.
    boatman, one thing comes to mind that I didn't see mentioned above.

    The bunks should extend all the way to the transom. If you stop them short of the transom you can get a hook in the hull from the unsupported weight.

    GFC
     
    NorCal Boater likes this.
  15. 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
    Mine has a 'hook' built in...lol. Theres another one at our marina identical that has a Crownline trailer and his bunks don't come all the way back either. There is a very slight change in the angle at the rear about 6" from the transom.
     
  16. Maggieiscrazy

    Maggieiscrazy Active Member

    261
    Oct 14, 2016
    Northern Wisconsin
    240 Sundancer
    5.0. Bravo III
    The bunk should come at least flush with the transom of the boat to make sure the boat is completely supported.
     
  17. NorCal Boater

    NorCal Boater Well-Known Member SILVER Sponsor

    Jan 24, 2008
    Covington, LA
    Cobalt CM23
    GM SB 383" Stroker" Alpha Gen I
    Pesonally, I would quit screwing around and get this whole rig to someone that knows what they’re doing. If you get this wrong you have the potential to screw up your boat, truck and your life.

    I love this forum and everybody means well but sometimes you need a pro to physically take over....this is one of those times.
    Shawn
     
  18. susanandlance

    susanandlance Well-Known Member PLATINUM Sponsor

    Feb 10, 2011
    Florida
    2007 Sea Ray 36 Sedan Bridge
    8.1 mercruisers
    Easiest thing to try is move winch post forward AFTER you check out trailer capacity
     
  19. susanandlance

    susanandlance Well-Known Member PLATINUM Sponsor

    Feb 10, 2011
    Florida
    2007 Sea Ray 36 Sedan Bridge
    8.1 mercruisers
    Also the transom needs full support from the bunks if not correct you can create waves in the bottom of your boat, its deff to far back on that trailer
     
  20. susanandlance

    susanandlance Well-Known Member PLATINUM Sponsor

    Feb 10, 2011
    Florida
    2007 Sea Ray 36 Sedan Bridge
    8.1 mercruisers
    You don't neeed a tri axle for a 250...…. 270 280 300 yes
     

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