Sailboat Engines & Propulsion

Your auxiliary engine and propeller move you in and out of harbor, hold you off a lee shore, and charge your batteries. Understanding how they work — and how to maintain them — keeps that safety margin intact.

What does this category cover?

It spans two areas: sailboat engines, including diesel fundamentals, cooling, fuel, and troubleshooting; and sailboat propellers, from fixed to folding and feathering designs. Together they define how your boat performs under power.

How do I keep my sailboat diesel reliable?

Follow a routine of clean fuel, fresh filters, healthy cooling, and regular oil changes, and run the engine under load often. Most engine failures trace back to fuel and cooling, so those systems deserve the most attention.

Which propeller is right for my sailboat?

Fixed props are simple and durable; folding and feathering props dramatically reduce drag under sail for better speed and pointing. Choose based on how much you sail versus motor, then match diameter and pitch to your engine and hull.

Explore our engine and propeller guides to service your auxiliary and choose the right prop for your sailing.