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New tow rig -- ball mount height issue

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  • New tow rig -- ball mount height issue

    I got a new tow rig last night for my 17' fiberglass runabout (approx 2500 lbs GW including trailer). The tow hitch is about an inch higher than what was on my old rig and is class III instead of class II, so I need to buy a new ball mount and ball. The problem being is that the old ball mount had a 6" drop and so ideally the new ball mount should have a 7" drop, however there are no 7" drop ball mounts to be found. I can get a 7 3/4" drop locally from U-Haul or I've seen a 7 1/2" drop available online. Am I correct in thinking that it would be best to go with a larger drop than a shorter one (lots of 6" drops available)...it seems that extra 1/2"-3/4" won't make to much difference, or will it?

    Thanks.

  • #2
    Doubt it will make any noticeable difference. For that matter, a 1" difference in that much of a drop would be negligible IMO.
    1986 Bayliner 16' Capri, 90 hp Johnson (sold)
    1990 Chaparral 2000 SL Sport, 4.3L LX, Mercruiser Alpha I, Gen I

    Link to Chaparral restoration- http://forums.iboats.com/forum/boat-repair-and-restoration/boat-restoration-building-and-hull-repair/10286641-chaparral-2000-sl-sport-floor-and-more

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    • #3
      7" drop is a ton of drop - but if you get something adjustable you can set it where ever you like. Last hitch you will ever buy, mine is about 14 years old (I've got a 6" version)

      https://andersenhitches.com/Products...ombo-ball.aspx
      2012 Malibu VTX 5.7 Monsoon 350
      2009 Ram CC 5.7 Hemi

      www.oldjeep.com

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      • #4
        Originally posted by oldjeep View Post
        7" drop is a ton of drop - but if you get something adjustable you can set it where ever you like. Last hitch you will ever buy, mine is about 14 years old (I've got a 6" version)

        https://andersenhitches.com/Products...ombo-ball.aspx
        The wheels/tires on the trailer are only 13". It's an old trailer/boat...1972. Here is a pic I took yesterday showing how it would line up with the 7 inch drop. Short of reworking the trailer, or buying another one, not much I can do about it I am afraid.
        Last edited by am_dew; August 18th, 2017, 09:33 AM.

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        • #5
          IF you have brakes, then yes you would want to tow level, or slightly inclined. From what I can see in your pic the trailer doesn't have brakes - correct?

          If so, use the 6" drop and don't worry about it.


          Ford huh (looks like the familiar blue oval back there)? Explorer??
          2017 Chaparral 19 H2O Ski & Fish w./4.3L 180HP Merc Alpha
          2005 Four Winns 200Le x/5.0L Volvo SX-M (270HP - FI) - ordered new, traded in on Chaparral
          1999 Bayliner Capri 1800LS w/2000 Honda 115HP - ordered new, traded in on Four Winns
          1956 MFG 15' w/matching Evinrude Big Twin 30HP - presumed to be a sandbox somewhere


          Tow Vehicle:
          2017 Toyota 4Runner SR5 Premium 4x4

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          • #6
            am i missing something? Looks like on that there should be almost no drop??
            1979 Carver Montego 2357 | 260 Mercruiser upgraded to Alpha | 2006 Nissan 15hp kicker

            Girls cry and boys fart in front of friends, but girls fart and boys cry in front of true friends.

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            • #7
              Originally posted by briangcc View Post
              IF you have brakes, then yes you would want to tow level, or slightly inclined. From what I can see in your pic the trailer doesn't have brakes - correct?

              If so, use the 6" drop and don't worry about it.


              Ford huh (looks like the familiar blue oval back there)? Explorer??
              No brakes, and yes, a Ford Explorer. So, you think slightly inclined with the 6" drop would be better?

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              • #8
                Originally posted by redneck joe View Post
                am i missing something? Looks like on that there should be almost no drop??
                Here is a close up of the hitch receiver in relation to the trailer tongue when the trailer is in the same vertical position as the pic above.

                Click image for larger version

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                • #9
                  Not going to hurt anything towing at a slight incline. Those of us with surge brakes need to tow level or slightly inclined to avoid riding the trailer brakes and burning them up. Without brakes, non-issue...as long as it's not excessive and a 1" difference isn't excessive.


                  **Your safety cables look a tad rusted. Might consider replacing those.
                  2017 Chaparral 19 H2O Ski & Fish w./4.3L 180HP Merc Alpha
                  2005 Four Winns 200Le x/5.0L Volvo SX-M (270HP - FI) - ordered new, traded in on Chaparral
                  1999 Bayliner Capri 1800LS w/2000 Honda 115HP - ordered new, traded in on Four Winns
                  1956 MFG 15' w/matching Evinrude Big Twin 30HP - presumed to be a sandbox somewhere


                  Tow Vehicle:
                  2017 Toyota 4Runner SR5 Premium 4x4

                  Comment


                  • #10
                    ok i think still think a 6" is too mkuch but i'm not htere.

                    I've got 15" wheen and two behind a Cummin dually and only have a 2" drop to ride level on mine.
                    1979 Carver Montego 2357 | 260 Mercruiser upgraded to Alpha | 2006 Nissan 15hp kicker

                    Girls cry and boys fart in front of friends, but girls fart and boys cry in front of true friends.

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                    • #11
                      Originally posted by redneck joe View Post
                      ok i think still think a 6" is too mkuch but i'm not htere.

                      I've got 15" wheen and two behind a Cummin dually and only have a 2" drop to ride level on mine.
                      In the pic showing the entire trailer, the bottom side of the trailer frame at one of the rear corners and the bottom side of the tube that the coupler attaches to are both the same distance from the ground, which I have to assume would be considered level.

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                      • #12
                        I think for our purposes here, it it "looks " level we can call it good. Agree there will be little gained by going too far out of your way to be spot on. The 6" sounds like it will be fine. Just watch the height of the ball itself and try to keep it to a minimum (yes there can be a good inch difference between different manf balls).

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                        • #13
                          If you think 6" is too little and 7" is just right, don't forget trailer tongue weight will drop the truck down. 6" may be just right and you won't know until you put weight on the ball.

                          Do change the safety cables, they need it.
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                          Only forum/moderator issues will be answered in PM's.

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                          • #14
                            Originally posted by am_dew View Post
                            Here is a close up of the hitch receiver in relation to the trailer tongue when the trailer is in the same vertical position as the pic above.
                            Put the trailer on vehicle's hitch and see how much the rear suspension drops. I'm guessing it's going to go down several inches, requiring less of a hitch drop to maintain a level trailer. (On my Durango the rear suspension squats 2-3" with the trailer's weight. I use a straight tow bar in the low position.)

                            It may be an optical illusion, but from the pic the trailer looks nose-down. Measure from the ground to the bottom of the trailer frame, front and back, to level it out.

                            My guess is you need a straight tow bar........

                            How much tongue weight does the trailer have?

                            2001 Crestliner SuperHawk 1800, Mercruiser 140HP
                            2007 Tracker 1436 jon boat, 7.5HP Force

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                            • #15
                              Sign up today
                              Originally posted by GA_Boater View Post
                              If you think 6" is too little and 7" is just right, don't forget trailer tongue weight will drop the truck down. 6" may be just right and you won't know until you put weight on the ball.

                              Do change the safety cables, they need it.
                              Ordered!

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