The 8 Best Outboard Motor flushers (2023 reviews)

The seasense outboard motor flusher is the best feature-rich flusher on the market today. It is a very good motor flush. It clamps on and delivers the water to prevent engine overheating when out of the lake. A heavy contractor garden hose adds additional strain and can kink the flush unit or pull the hose adapter completely out. It is great for +75hp mercury outboard.

It's solid and stays in place after you set it. They work very well and feed both inlets on the motor. It has to be placed exactly in the right spot for them not to leak.

Why We Like This:

Directs maximum amount of water to engine
Works great on bigger bravo drives with elongated water pickups
Great set of water muffs easy to attach to the motor

Best For Mecury: Shoreline Marine Outboard Motor Flusher

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The shoreline marine outboard motor flusher's superior materials makes sure that it ages well with use. This dual flow outboard engine flusher works great for running your bost for maintenance of course but for salt water flushing it puts more water through the engine faster. It is designed with a strong spring action and will remain solidly attached to the lower unit. It is easy to mount with extra wide "ear muffs. The metal bracket keeps the device tightly against the outdrive. It provides a great amount of water to the outborad while starting on the trailer.

This motor flusher helps extend your outboard engine’s life by regularly flushing away salt, silt, and grime after use. You can use it to test run your motor before heading to the water. This is the proper tool to properly flush an outboard or an I.O.

Why We Like This:

A must have for a yamaha four stroke
Double side feed is a great idea for engine flushing and so simple
Very nice to flush the motor and work on the motor in the yard
Sturdy, works perfect on the mercruiser

Best Good Product: Redneck Convent Outboard Motor Flusher

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Not everyone likes to purchase flusher for their regular usage, but the redneck convent outboard motor flusher would be an anomoly. 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. It slips right over all the water pick-ups and has a surprisingly good seal once the everything is running. It is compatible with most johnson/evinrude, mercury, yamaha, chrysler, force, honda, nissan, suzuki, and tohatsu outdrives.

Inferior round cups do not always fit correctly over intake ports, but these rectangular cups are easy to put on, clamp very tightly, and provide maximum water flow in both intakes while allowing for zero leakage once you start the engine. It flexes open to allow for the width of outdrive and holds tight to fore water into the intake ports, through the motor and out the exit port near the top. It will connect directly to a water hose. It does a great job of providing the water supply needed.

Why We Like This:

Easily adjusts for vertical or horizontal intake screens
Strong spring so it actually stays on
Lot of satisfied buyers

Best For large inboard outboat engines: Seachoice Outboard Motor Flusher

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Best part: seachoice outboard motor flusher costs comparatively low and it is available to ship in 24 hours. It is made for large inboard outboat engines. It slips out of the main input hole in the stern drive of the motor. You turn on the water and the suction cups apply water to the engine with any excess leaking out alongside the suction cups. It can be used in on a 25 hp mercury, and the muffler does spread out a bit when attached.

This device slides over the 2 water input ports on the sides of the motor. It’s held in place by the spring action of the U bar. It is a must have to test engine function before hitting the lake for a water test. It is great for flushing your outboard engine out after being used in salt water or for testing the engine on land.

Why We Like This:

Very tight and easy to hook up
Great flow and easy to use
Good method to run outboard off water
Essential for running an outboard motor out of the water

Best For inboard: Camco Outboard Motor Flusher

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If you often find yourself confused about convenient and suitable flusher, camco outboard motor flusher should be your first option for buying. The Camco dual flow motor flusher helps properly maintain your boat's engine by flushing out contaminates. It gets the water where you need it to flush your outboard motor. It snaps on the drive tighter than the competition and will not fall off, plus the water flow is super since the water comes from both sides.

The flusher's dual input design allows enhanced flow through the engine. It fits snugly and works really well. The motor it is put on runs perfectly and with minimal water. It is compatible with most outboards and sterndrives. This is a must for anyone with a boat.

Why We Like This:

Very tight and produces a great water flow
Easy to attach and worked as designed
Supplies more water to motor than single type

Best For A Boat Motor: Attwood Outboard Motor Flusher

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The attwood outboard motor flusher is satisfactory and appropriate and fits well with your daily purpose. It fits on most domestic or imported inboard/outboards and outboards. It comes with a rubber washer and also will last a really long time. It will never rust especially for those who boat in salt water. It squeezes over the inlet grate on the lower unit of the engine very tight. It supplies plenty of water for flushing the engine.

This works on pretty much any motor where the inlets are on the sides. It clamps over them and provides water flow to the water pump. It will never pop off with high water pressure especially for those who boat in salt water.

Why We Like This:

Easy to install, and works perfectly
Easy to use, flushes motor well
New and hot release

Best For rubbing Engine: ISURE Marine Outboard Motor Flusher

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Isure Marine has been making great flusher for years, thanks to a combination of clever design and appropriate materials. This flusher fits most johnson / evinrude, mercury, yamaha, chrysler, force, honda, nissan, suzuki, and tohatsu. It provides an ample amount of water to run the motor. There is an extra piece (other connector) inserted into the hose connector. It allows idling for engine adjustments, installs in a black coated spring steel frame for quick & secure connection. It fits a wide variety of engines.

Why We Like This:

Flushes contaminates fromthe cooling system and allows idling for engine adjustments, installs in seconds
Easy installation, requires no tools for installation or removal
One of the new comers and featured product

Best For optimal utility: Extreme Max Outboard Motor Flusher

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Extreme Max line of flusher come in a pretty wide variety of styles, so you can definitely find one that suits your individual preferences and needs. If you do a lot of saltwater fishing this is a must. It features a high quality aluminum construction and stainless steel hardware designed to withstand the harsh conditions of a marine environment. It is great to run a boat while out of lake. It has engineered a series of lift tables and jacks designed specifically for the day-in and day-out maintenance required for diy atv and motorcycle owners. It's strong and the spring tension will hold the water pressure.

It is designed for its purpose, whether it as a dock line, fender line, or anchor line. It's easy to use, and it just slips on.

Why We Like This:

Changing tires, lubing chains, deep cleaning all go smoother with the right tools
Keep your engine clean, winterize it properly, and extend its life
New and hot release