Easy to use Berthing & Mooring Aids for Power and Sail Boats


The Cleat Captor Z was designed to suit the common 290 mm cleats found on the majority of marina berths. Accordingly the gap between both jaw tips is around 400 mm which allows a comfortable margin of clearance for the cleat even when the mooring line is fitted and tensioned slightly. 

With larger boats becoming more common, some marinas fitted a few large berths with the larger 350 mm cleats. While the Cleat Captor still works on these cleats, the margin for user error is reduced.

As a consequence, a simple and easy solution has been developed to provide a larger jaw tip gap for use with larger cleats. The following instructions apply.

  1. You will need 2 x 3/16 UNC nuts and a screw that is 1/4 inch longer than the original jaw screws.  
  2. CAREFULLY remove the jaw screw closest to the jaw tip. Do NOT use a power screw driver.
  3. Fit the longer screw in place of the original being CAREFUL that you do not cross thread it and destroy the thread in the jaw.
  4. Manually tighten the screw until it is just firm. Over tightening risks stripping the thread.
  5. On the inside of the jaw, fit a 3/16 nut over the new screw and tighten it so that it is just firm.
  6. Fit the handle over the jaw screws and before you fit the other jaw, fit the remaining  3/16 nut against the handle and finger tighten it.
  7. Now you can fit the remaining jaw with its wing nuts. The jaw tip gap has now been increased by about 50 mm (2 inches) which provides a generous increase in clearance for the larger cleats.

Both jaws are still held against the handle at 3 contact points which ensures that the jaws remain securely located and stable. The only downside is that you need to remove the 3/16 nut when disassembling the Cleat Captor  for stowing.

The components are available as a CLEAT CAPTOR LARGE JAW MODIFICATION KIT.