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⚓ Keep your engine fresh, clean, and ready to conquer the waves!
The Shoreline Marine Motor Flusher is a durable, dual-flow accessory designed to protect and extend the life of most inboard and outboard boat engines by flushing away corrosive salt, silt, and grime. It connects easily to any standard garden hose and installs in seconds without tools, making engine maintenance and winterizing effortless for boat owners who demand reliability and performance.

| ASIN | B004LR9SDI |
| Best Sellers Rank | #1,819 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #1 in Boat Engine Motor Flushers |
| Brand | Shoreline Marine |
| Brand Name | Shoreline Marine |
| Color | Multi |
| Customer Reviews | 4.5 out of 5 stars 4,617 Reviews |
| Engine Type | Internal Combustion Engine |
| Fuel Type | Gasoline |
| Global Trade Identification Number | 00013893522078 |
| Included Components | Dual Flow Feed Rubber Motor Flusher |
| Item Dimensions D x W x H | 5"D x 3.25"W x 14.75"H |
| Item Type Name | Shoreline Marine Motor Flusher Dual Flow |
| Item Weight | 1 Pounds |
| Manufacturer | Shoreline Marine |
| Manufacturer Part Number | SL52207 |
| Manufacturer Warranty Description | Manufacturer warranty |
| Material | Blend |
| Material Type | Blend |
| Model Number | SL52207 |
| Mounting Type | Flush |
| Operation Mode | Manual |
| Recommended Uses For Product | For Inflatable Boats |
| UPC | 013893522078 796793898817 |
| Unit Count | 1.0 Count |
D**Y
Works Great. Worth the Money
Works great. Good quality. Very pleased. Worth the money.
K**4
Works as should
Worked perfect for my boat, fit nice and snug, leaked a little but that was expected
R**R
Secure fit and works great!
Works perfectly! I have a Yamaha 90 it works awesome.
J**S
Functions acceptably
The hose attaching end is not firmly attached and comes off easily. Slide it back on and it continues to function correctly. Not a show stopper, but a little aggravating. Works OK for its intended purpose. I have mixed feelings on recommending because of the hose attachment piece coming off, but other than that it works as intended for flushing a motor.
G**T
Very good muff
Flushes water from both sides
S**H
Gets the Job Done
I picked up the Shoreline Marine Universal Motor Muffs for flushing my 2-stroke 40hp outboard after saltwater runs, and honestly, they work just fine for what they are. Installation is quick—just clamp them over the water inlets, hook up the hose, and you’re good to go. I like how they snug up pretty well and stay in place if you center them right. Water flow was steady, and my motor started pulling water almost immediately. No leaks or sputtering—just smooth flushing. I’ve used them maybe a dozen times now, and they still look decent with no cracks in the rubber or weak springs. The only knock I’d give them is they feel a bit lightweight. I wouldn’t expect them to hold up to years of hard use or fit every engine perfectly—if you’ve got a bigger or oddly-shaped lower unit, double-check the size. But for your average outboard, this is a solid, affordable tool that gets the job done. If you’re a weekend boater or doing occasional flushes, I’d definitely recommend these. Just don’t expect high-end durability—they’re basic, and they work.
J**R
Good buy
Works just like it should
K**N
Didn’t work for me
It didn’t provide a sufficient water seal on my Yamaha 80hp 4-stroke. Unfortunately I didn’t test it before the return window closed. It looks well made but the rectangular cups are too large for my motor. I would have given it a 1 star but take responsibility for not testing it sooner.
A**S
Absolute ripoff rubbish!!!!
Shocking muffs. They just do not work. The rubber pads just do not seal!! The water goes everywhere except into the engine. I missed the return, so £20 down the drain. Read the reviews .........enough said. DO NOT BUY THESE!!!!!!. Man, i hate being ripped off!!!!!!! You can get good advice on any outboard forum. Everyone on them advices not to buy square/ rectangular muffs and to go for circular ones. Wish i'd seen that sooner.........
G**L
Motor flusher/ muffs
Very good buy. Very good quality and work as they should. Much easier to run tune and adjust motor out of the water.
D**T
Good quality
Excellent quality
A**I
Good quality
Recommended
A**R
Works well on Yamaha outboard
Just tried this item on my 200 hp Yamaha outboard and it worked great.
Trustpilot
1 week ago
3 days ago