Lewmar 60mm Synchro Block - Single Brand_Ronstan 4L engines with Mercruiser Thunderbolt

4L engines with Mercruiser Thunderbolt Electronic Ignition

bronze housing has minimal drag

UPC: 7640178721111

It can be used at night

Lewmar 60mm Synchro Block - Single Brand_Ronstan 4L engines with Mercruiser Thunderbolt60mm Synchro Block Single Lewmar's Synchro Blocks are engineered for speed, efficiency, and superior handling. Using a combination of scientifically optimized block geometry, a Free Spin bearing, and a self aligning head to reduce friction and increase efficiency by up to 40%, over budget blocks on mainsheet systems. Each component is perfectly synchronized with the movement of the rope, providing you with an easier, smoother transfer of power from