Skip to content Skip to navigation menu

75mm Carbo Ratchamatic Flip-Flop Block with Cam


Model # 9485764 | Mfg # 2689
Ships directly from the vendor

Load-sensing ratchet block

Harken's high-load Flip-Flop Block has a low profile, lightweight pivoting lead that articulates from side to side. Its hinged construction allows for various lead angles in mainsheet systems, mast-base control lines and spinnaker halyards, keeping lines clean and close to the deck. Ratchamatic feature gives sailors the holding power of up to 15:1. Ratchet can be adjusted to higher or lower load depending on the sailor's strength, sailing style and system usage.

The Ratchamatic Flip-Flop is a load-sensing ratchet block that rolls freely in both directions under low loads and automatically engages the ratchet as loads increase.

75mm Carbo Ratchamatic Flip-Flop Block with Cam

Becket No Becket
Diameter 7/16 Inch or 11 mm
Direction Any
Integral Cleat Integral Cam
Mount Type Mechanical Fasteners
Ratchet Ratcheting
Safe Working Load 300 Pounds
Sheave Diameter 75 mm
Type Single Pivoting

West Advisor

The West Advisor articles have answered boaters' questions and provided solutions to boating problems for more than 20 years. West Marine has compiled one of the Web's most comprehensive collections of technical boating information articles.


by PowerReviews
Harken75mm Carbo Ratchamatic Blocks

(based on 1 review)

Ratings Distribution

  • 5 Stars



  • 4 Stars



  • 3 Stars



  • 2 Stars



  • 1 Stars



Reviewed by 1 customer

Displaying review 1

Back to top

(1 of 1 customers found this review helpful)


Do what they say.

By Nieldy

from Windermere England

About Me Professional

Verified Buyer


  • Attractive Design
  • Easy To Install
  • Easy To Use
  • Quality Construction


    Best Uses

    • Sailing

    Comments about 75mm Carbo Ratchamatic Blocks:

    We use these blocks to help get the genoa in on a 24ft racing yacht. The blocks work well and help to the extent that most of the time, winching in the sail is no longer needed. This means faster, crisp tacks. We have not yet decided upon the best setting at which the ratchet engages, but a few more races and we will find a good all round setting.

    Displaying review 1

    Back to top