The 7 Best Mercury Outboard Motor flushers (2023 reviews)

We consider a mercury outboard motor flusher to be a worthy investment in the long run. We are here to help you choose the right one for your purposes from all the best available products in market today.

Our review process: Show/Hide

Our Top Picks:

Best Overall: Buy: Shoreline Marine standard garden Hose READ REVIEW

Best For large inboard outboat engines: Buy: Seachoice Mercury Outboard Motor Flusher READ REVIEW

Best Good Product: Buy: Redneck Convent Mercury Outboard Motor Flusher READ REVIEW

Best For rubbing Engine: Buy: ISURE Marine Mercury Outboard Motor Flusher READ REVIEW

Best With earmuff: Buy: seasense Mercury Outboard Motor Flusher READ REVIEW

Best value For money: Buy: Five Oceans Mercury Outboard Motor Flusher READ REVIEW

Best suction power: Buy: Shoreline Marine Mercury Outboard Motor Flusher READ REVIEW

Best Overall: Shoreline Marine standard garden Hose

Buy on Amazon

Best part: shoreline marine standard garden hose costs reasonable and it is available to ship in 24 hours. It is great for the boat motors that need the extra force of water to flush your system. It pumps water like crazy with the water coming in from both sides. It is designed with a strong spring action and will remain solidly attached to the lower unit. The metal bracket keeps the device tightly against the outdrive.

These muffs make it easy to test your outboard before taking it to the lake and all ways a good idea to flush contaminates from salt or fresh water in the motor when you get home. It comes with a water port on each cup so you get a better water flow to your engine water intake. The muffs are quite wide and provide excellent coverage.

• Ideal for a salt water engine
• Handy for starting motors on shore
• Works fine, better water supply than a single side, and well made
• Works fine on mercury 4 stroke

Best For large inboard outboat engines: Seachoice Mercury Outboard Motor Flusher

Buy on Amazon

The seachoice mercury outboard motor flusher is satisfactory and appropriate and fits well with your daily usage. It fits many different boat motor sizes. It is committed to delivering quality marine accessories and oem replacement parts to satisfy fishing, boating and watersports enthusiasts worldwide. It has strong suction strength that keeps the cups in place while the water is on and is very durable and well built. 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 has water pickup on the sides of the lower unit. The gap between the cups is small and the tension from the arms is high. It is manufactured to rigorous standards to ensure proper function and first-rate appearance.

• Worked on mercury four stroke 115hp outboard motor
• Good method to run outboard off water
• Great flow and easy to use
• Moves, ratcheting tie down really helps

Best Good Product: Redneck Convent Mercury Outboard Motor Flusher

Buy on Amazon

If you often find yourself scrambling for convenient and suitable flusher, redneck convent mercury outboard motor flusher should be your first option for buying. This product is just a simple way to flow water in your outboard intake, to make sure it is clean and if you want to start it before you go to the lake, the product looks very sturdy and functional. It slips right over all the water pick-ups and has a surprisingly good seal once the everything is running. As long as your boat includes side water inlet ports, this flusher is for you. It does a great job of providing the water supply needed.

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. 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.

• Easily adjusts for vertical or horizontal intake screens
• Strong spring so it actually stays on
• Good brand reputation

Best For rubbing Engine: ISURE Marine Mercury Outboard Motor Flusher

Buy on Amazon

The isure marine mercury outboard motor flusher is satisfactory and appropriate and fits well with your daily purpose. 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. The Item fits well and is also well built. It allows idling for engine adjustments, installs in a black coated spring steel frame for quick & secure connection.

• Flushes contaminates fromthe cooling system and allows idling for engine adjustments, installs in seconds
• Easy installation, requires no tools for installation or removal
• Delivers what they promise

Best With earmuff: seasense Mercury Outboard Motor Flusher

Buy on Amazon

The seasense mercury outboard motor flusher should be able to handle its purpose and duties with ease. This outboard motor flusher fits most motors 15 HP and under. It also sprays water out both the front and back sides of the SeaSense flusher, so you'll want to stand clear. This is a single piece of plastic that doesn't flex much. It works fine, better than using a barrel or trash can ever time.

This is a great way to avoid taking the prop off everytime you want to flush your outboard. It can be used in salt water but it is important to flush it with clean water after use. It allows easy installation without removal of the prop.

• Simple to use without detaching the propellor
• Inexpensive enough to replace if needed
• One of the new comers and featured product

Best value For money: Five Oceans Mercury Outboard Motor Flusher

Buy on Amazon

We know from years of feedback from readers, customers and amazon sellers, what most people want in a feature-rich yet easy on pocket flusher. The five oceans mercury outboard motor flusher is exactly that - it's a simple flusher that hits all the right notes. 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. It fits most outboard outboard engines including mercury, yamaha, evinrude, mercury, yamaha, johnson, chrysler, honda, nissan, and suzuki as well as others.

This unit should be a perfect fit if your outboard has water intake inlets on each side of the lower unit. It slides right over the intake port on the engine. You can connect these outboard motor muffs to a standard garden hose or an optional quick-connect male adapter end and rubber washer. It helps extend your outboard engine's life.

• Works really good puts plenty of water to the motor
• Easy to use and fit correctly
• Good brand reputation

Best suction power: Shoreline Marine Mercury Outboard Motor Flusher

Buy on Amazon

Shoreline Marine is known for creating pragmatic and minimalist flusher for people on the go, and its line of shoreline marine mercury outboard motor flusher definitely falls in line with that reputation. This large motor flusher helps extend your outboard engine’s life by regularly flushing away salt, silt, and grime after use. It is designed for large outboards and helps increase its life by protecting it from contaminants. It is not only clean, but you can also winterize your boat with the help of this essential boat accessory and keep your investment in good condition.

You can connect this boat motor flusher to a standard garden hose and help keep your motor clean by flushing away sand, salt, silt, and mud. This boat motor cleaner is compatible for larger outboards including Mercury, Yamaha, Evinrude, Mercury, Yamaha, Johnson, Chrysler, Honda, Nissan, Suzuki as well as others.

• Installs just in seconds and requires no tools for installation or removal
• Product testing and quality control procedures are implemented in house to test each product
• Simple to use just hooks up to garden hose