How to Service Harken Black Magic Blocks || Tech Team Asked & Answered

Black Magic Air blocks are a top favorite of big boat performance racers and cruisers. These lightweight, free-running, powerful performers are used for sail controls that see lots of action: mainsheet, runner, halyard, and spinnaker systems. So they also need to be easy to clean and service. Watch the video to learn how. They have few parts and no loose balls or rollers to misplace. Unlike blocks that are riveted, fasteners allow quick disassembly with a single hex wrench.