The 6 Best Marine Motor flushers (2023 reviews)

Five Oceans has been making good-quality flusher for years, thanks to a combination of clever design and high-end materials. If you mean to work on the engine while out of body water and run it with water hose attached then that’s what it’s designed for. This product will work if the cooling water intakes are located on the outdrive on opposite sides of the drive unit. It slides right over the intake port on the engine. It fits most outboard outboard engines including mercury, yamaha, evinrude, mercury, yamaha, johnson, chrysler, honda, nissan, and suzuki as well as others.

You can connect these outboard motor muffs to a standard garden hose or an optional quick-connect male adapter end and rubber washer. The unit is used to winterize the engines. This is great for testing your boat when you ain't in the water and it's great to have one handy.

Why We Like This:

Seals great and gets enough water to flush engine
Keeps the engine from overheating and dry run damage
Excellent version of the ubiquitous "motor muffs" you see everywhere

Best For large inboard outboat engines: Seachoice Marine Motor Flusher

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For a low asking price, seachoice marine motor flusher has managed to overwhelm their customers by packing as many features as they could. This motor muff works exactly as it is intended. It fits smaller outboards great. It’s held in place by the spring action of the U bar. You turn on the water and the suction cups apply water to the engine with any excess leaking out alongside the suction cups. It is made for large inboard outboat engines. It has strong suction strength that keeps the cups in place while the water is on and is very durable and well built. It will fit on any motor. It is a must have if you run your engine in salt water.

Why We Like This:

Worked on mercury four stroke 115hp outboard motor
Works great no worries from running an outboard motor without water
Cups are rubber and seal well
Moves, ratcheting tie down really helps

Best Good Product: Redneck Convent Marine Motor Flusher

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We know from years of feedback from readers, customers and amazon sellers, what most people want in a convenient and appropriate flusher. The redneck convent marine motor flusher is exactly that - it's a simple flusher that hits all the right notes. As long as your boat includes side water inlet ports, this flusher is for you. It fits snuggly to the Mercury motor, the water flushes the cooling system and keeps a steady flow out of the exhaust port. It will connect directly to a water hose.

This flusher is made to fit just about any outboard motor that has water intake ports within 6 to 8 inches of the edge of the motor. The feed tubes are plastic so handle it by the metal spring-arms. It is made from obviously good quality materials, and works flawlessly. It is perfect for flushing and starting the motor out of the water.

Why We Like This:

Hooks up to water hose easily and fits tight on motor
Easily adjusts for vertical or horizontal intake screens
Good to have a dual sided water source going into the water intake

Best For A Boat Motor: Attwood Marine Motor Flusher

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We know from years of feedback from readers, customers and amazon sellers, what most people want in a convenient and appropriate flusher. The attwood marine motor flusher is exactly that - it's a simple flusher that hits all the right notes. This Attwood universal motor flusher quickly and easily flushes away materials such as salt, sand, silt, and alkali to prevent clogging and corrosion of an engine cooling system. It clamps over them and provides water flow to the water pump. The plastic frame ensures the cups fit the engine tightly so it's not starved for water when flushing/testing/tuning on dry land. It fits snugly and forces water into the engine.

The molded cups deliver fresh water to flush the cooling system through the side intakes on the lower unit. It fits so well with no use of additional clamps, etc. The female hose connection part is also one piece integrated with the muff.

Why We Like This:

Works good, comes with rubber washer
Easy to install, and works perfectly
Lots of tension to provide good water flow

Best For test: Moeller Marine Motor Flusher

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Not everyone likes to purchase flusher for their daily purpose, but the moeller marine marine motor flusher would be an anomoly. This flusher is meant for motors having 2 water intakes located at the lower leg. It does the job to allow you to tune your motor on land. They are durable, dependable and will have them for years. The flush unit requires over three inches of clearance on all sides. It is great for testing running an outboard.

These are 1" larger and they would fit more boats a little bit better. It is no need for drums to run your engine when you're working on the boat.

Why We Like This:

Great piece of equipment for winterizing motor
Good investment for long term

Best For inboard: Pactrade Marine Motor Flusher

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The pactrade marine marine motor flusher's high-end materials makes sure that it ages well with use. It is a telescoping adjustable motor flusher for inboard boat motors. It allows the cooling system to be flushed out using a garden hose, and it works on most inboards. It allows precise alignment for hard to reach areas. The Large cup prevents water blow by or fall off during usage or flushing. It has a great way to test run your boat before heading for the water.

Why We Like This: