How to Check and Replace an Outboard Motor Impeller

When you're out on the water, the last thing you want is engine trouble. One of the most crucial, yet often overlooked, components of your outboard motor is the water pump impeller. This small part is responsible for circulating cooling water through the engine, preventing it from overheating. A faulty impeller can lead to a damaged engine, so knowing how to check and replace an outboard motor impeller is essential for any boat owner. Why Impeller Maintenance is Crucial An impeller is a rubber or neoprene part that sits inside the water pump housing. As it spins, it pulls water from the lake or ocean and pushes it through the cooling passages of your engine. Over time, the flexible blades of the impeller can become brittle, cracked, or worn, reducing its ability to pump water effectively. This is especially true for engines that are used in saltwater or those that sit for long periods. Regular checks and replacements are key to ensuring your engine's longevity and reliabilit...