**New, bought and didn't end up needing it, but couldn't return. Never opened the bag it comes in**

R & D Flex Coupling 910-026

R & D Flexible Couplings reduce engine noise, vibration transmission

Designed to accept propeller thrust.

Constructed from a polyester elastomer.

Impervious to salt water, diesel, and lubrication oils

910-026 – Twin Disc

                             Gearbox Flange Dimensions                      Flexible Coupling Details

                             Diameter 146.0mm  5.75”                              Diameter  152.4mm     6”

                     No. of Bolts    6                                            Length   49.8mm 1.96”

                             Nom Dia of Holes  16mm 0.63”                       Bolt Diameter  1/2UNF

                             Bolt pitch Circle  120.6mm 4.75”                    Capacity/100 rpm      20.88

                     Register 76.2mm 3.0”                                    HP       28

Couplings fitted with a shouldered bush to locate in the gearbox flange. 

These flexible couplings have been approved by LLOYDS REGISTER OF SHIPPING

To calculate Power of coupling required.

Horsepower of Engine x Reduction Ratio x 100 = HP/100rpm Engine Speed