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Viewed from astern, this propeller rotates counterclockwise with the engine in forward gear, making it a left-handed prop. The numbers stamped on the hub indicate that it has a diameter of 16 inches and a pitch of 11 inches.

Basic insights into how they work Issue 71 : Mar/Apr 2010 Much complicated mathematics lies behind the deceptively simple appearance of a boat’s propeller, but it can be described and specified with a...

Safina’s pilothouse design allows her owner, Larry Rosen, to stretch the seasons on Maine’s Penobscot Bay.

A small Danish motorsailer for all-weather cruising Issue 71 : Mar/Apr 2010 Larry Rosen dreamed of owning a boat that sailed well, was suitable for extended cruising, and that he could comfortably liv...

For a small investment in thought, time, and coin, Vern earned a tidy dividend.

Unruly wires get herded onto a bus Issue 72 : May/Jun 2010 Recently, a failed torque damper required the removal of our good old boat’s good old engine. I made arrangements with the yard boss to have ...

Even Marelon seacocks get stiff, at left. This one is in the open position with the handle vertical. Exercise it by moving the handle to the 90-degree position. Note that the screws on the two clamps securing the hose oppose each other. The handles on this Y-valve line up with the direction of the fluid flow, center. Exercise it toward the direction of the alternate flow, an approximate 120-degree rotation. One of the front engine mounts, at right. A bolt above the bracket secures the assembly. Remember to torque the lag bolts that hold the engine mount to the hull.

For peace of mind, check what’s out of sight Issue 72 : May/Jun 2010 Some of the mechanical components on your sailboat are so reliable you probably don’t give them a thought. But don’t assume they’ll...

Gate – a gate is a section in the lifeline that can be opened to facilitate boarding and is normally located between two closely spaced stanchions.

Ensure your first line of safety really is safe Issue 72 : May/Jun 2010 Lifelines are designed to reduce the chances of your going overboard. On many boats, however, these systems are poorly designed ...

A suspect swaged fitting, at right, led Andy to replace the whole backstay on a Tartan 37. He chose to use Hi-MOD mechanical fittings, center. Adam, the boat’s owner, was away on business, bottom, leaving Andy in charge.

Here’s a rigging project you can do yourself Issue 72 : May/Jun 2010 My best friend Adam’s new-to-him Tartan 37, Audentia, had never left the dock with him at the helm. He’d purchased her in February,...