The 5 Best outboard Carbon cleaners (2023 reviews)

The sea foam outboard carbon cleaner's material feels more premium than its price would suggest. It makes ethanol easy to manage. It is good for any motorized vehicle or motorcycle diesel or gas and can be used besides in gas tanks and also in the crank case of vehicles and motorcycles. It will run on sea foam and clean out the “varnish” that has built up. The "top engine" cleaner version is to spray directly into the air intake. It cleans oil passages prior to your oil changes.

Why We Like This:

Works great in oil and gas
Has more speed and idles quieter
Add sea foam to the auto and truck engines regularly to prevent carbon buildup
Helps remove varnish in engines the stand idle

Best runner up: Mercury marine mercruiser outboard Carbon Cleaner

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If you want nothing short of the optimal cleaner for your regular usage, this mercury marine mercruiser outboard carbon cleaner is certainly a wise investment. The Mercury Deep Clean 2 Marine is hands down the best injector cleaner. It is a fuel system and injector cleaner. It can be used in 2 & 4 cycle mercury outboards. It is designed to clean and decarb motors. This, like most cleaning and octane boosting additives should be packaged in a metal container. It can help during the winter storage. The additive will help keep the fuel clean.

Why We Like This:

Must have for the picky dfi motors
Best to leave the boat’s fuel as low as possible
Less fuel in the tank the better during storage

Best For rough idle: Chevron outboard Carbon Cleaner

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If you often find yourself scrambling for convenient and suitable cleaner, chevron outboard carbon cleaner is your end point. This fuel system cleaner is definitely the best. It is good as techron, but a lot of it uses way nastier solvents like naptha and paint thinner. This stuff has polyetheramines that slowly break down carbon. This will let the solvents soak into the deposits. It cleans injectors very well.

This is 20oz and can treat 20 gallons of gas. It has more power, doesn't miss, and idles much smoother. It is great for rough idle.

Why We Like This:

Terrible hesitations, near stalling, no torque, no oomph
Simple way to help keep car running smoothly
Cleans, removes sludge and some carbon build-up

Best Injector Cleaner: Red line outboard Carbon Cleaner

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The red line outboard carbon cleaner should be able to handle its purpose and duties with ease. The engine is an L2 Rolls-Royce 6.7 litre turbocharged. On the plus side, this has one of the highest concentrations of PEA (Polyether amine) of any additive. It cleans to nearly 100 percent efficiency in one treatment. The car is 108, 000 miles and feels slightly better in engine chatter. The sound is louder but its like a healthier, more powerful sound. The tires are not having trouble keeping up with an extra power boost. The truck is usable and reliable again.

Why We Like This:

Improvement in gas milage and idle
Definitely makes the car run smoother and improves fuel efficiency
Smooths out idle and better acceleration
Great for old and new cars

Best premium: Quicksilver outboard Carbon Cleaner

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Quicksilver offers a variety of cleaner for personal choice and yet maintaining quality in all the variants. It is the premier supplier of mercury marine original equipment replacement engine parts, oils, and accessories, but also works to serve all original equipment brands in the marine and powersports industries. It offers rapid fuel system cleanup to increase engine life and decrease maintenance costs, while quicksilver quickstor keeps gasoline fresh for up to two years. It can save you a lot of unnecessary expense.

The boat runs better than it ever has, great power, idles like a dream and better fuel usage. It will take a day of running then sitting overnight and running again. The bottles use to be solid black that you could not see inside. It helps to keep your injectors clean and help to keep carbon build up to a minimum.

Why We Like This:

Regular use will keep your motor cleaner and make it last longer
A must for a mercury two stroke engine
Perfect product to mitigate water or contaminated fuel