How often should you change impeller on Mercury outboard?

How Often Should You Change the Water Pump On Mercury Outboard? In most cases, you won’t need to replace the water pump unless the housing is damaged. Instead, replacing the water pump impeller every three years or sooner should avoid most water-pump-related issues and keep your outboard running in excellent condition.

How often should the impeller on a boat be replaced?

You should check the impeller’s condition during Spring Commissioning and every 200 hours of operation. Correctly installed impellers may last for several years, but you should stick to a schedule of preventative instead of emergency maintenance.

What happens when an impeller fails?

If your impeller fails, the pump can’t pump cool water to the engine causing your engine to overheat. If you catch that your impeller is failing early on, you might avoid major problems. However, if you’re not fortunate enough to catch a bad impeller, the results can be catastrophic to your engine.

Why do impellers fail?

The top 3 most common causes for impeller failures are due to cavitation, erosion and corrosion.

When should I replace my impeller?

Every spring. No manual, but it only takes about half a day and it’s better than a failure on the water.

How can I tell if my impeller is bad?

With a bad impeller, water can’t be pumped inside, overheating the engine. Signs of a bad boat impeller are either boat engine overheats when you try to accelerate, loss in impeller vanes flexibility, physical wear & tear like cracks in impeller vane roots, melted or worn of vanes.

How long do outboard impellers last?

three years
All impellers should be changed at a minimum of three years. Some will not make it that long depending on many things, how often it is used… too little and it will deform and tend to dry rot. Use it alot and it will wear out from spinning around in it’s housing.

How long can you run a boat motor out of water?

How Long Can an Outboard Run Without Water? An outboard motor’s water pump will be damaged in as little as a few seconds without a water source. Depending on the size of the outboard engine itself and ambient temperatures, it may be able to go a few minutes without damage.