Allen Dual Arm Mainsheet Jammer Inflatable Boat Spares F4B-903 (10-13337-01 & 10-24509-01) and

F4B-903 (10-13337-01 & 10-24509-01) and Yanmar 128990-42500 pumps

- Suitable for use with pressure switch and microswitch systems

L6140A & Yanmar engines from 1997: 6SY-STP & 8SY-STP

including lock and 2 keys

Allen Dual Arm Mainsheet Jammer Inflatable Boat Spares F4B-903 (10-13337-01 & 10-24509-01) andDual arm mainsheet jammer. Allen have spent many hours of research and development with various boat builders to perfect the angle and height of the cleat to optimise mainsheet jamming. Innovative light weight construction. Dual ball race for maximum efficiency. Optional click stops limit swivel rotation. Line snags virtually eliminated. Standard and high cleating angles to suit all. A groove had been created in the arm for the location of the ball