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Your cart is empty.Mechanic In A Bottle is the solution to FIX poor or non-running 2 and 4 cycle engines due to modern fuel issues. This synthetic fuel additive removes all varnish in the fuel system without having to remove the carburetor, removes carbon deposits and water, revitalizes rubber and plastic components, replaces lost octane and rejuvenates old fuel. Cleanses your equipment’s fuel system so that it starts efficiently and operates in top condition.
Humpy
Reviewed in the United States on February 5, 2025
Best on the market from years of experience in stabilizing our ethanol gasolines! Have used numerous brands in both 2 and 4 cycle engines. This one has proven itself above all others in all of my equipment in use and storage. Small engines, auto's and boat.
Kelly
Reviewed in the United States on August 29, 2024
This is my go-to, "Save my bacon" product. Follow the instructions and possibly add slightly more in worst case scenarios. I brag about this product all the time. It has helped me NOT take apart carburetors, that's a good thing.
M. GUERNSEY
Reviewed in the United States on January 19, 2024
This works great for small gas engines that have not ran for awhile. Old gas containing alcohol will also plug carbs and stick everything together. I had to start an old snow blower that had not ran several years. Used one ounce of this and 8 ounces of good premium no-alcohol gas and had the old Tecumseh Snow King engine purring in about 20 minutes. Works similar to Sea Foam but I think it unsticks carbs better.
Dual-500
Reviewed in the United States on December 29, 2023
I fun this in all 2-cycle engines - blower, trimmer, and chainsaw. Since starting to use Mechanic in a Bottle 10 years ago, it's cut down on carburetor problems by 80-90%.Also put a 16oz bottle of it into the gas tank of my Jeep 5.7 Hemi once or twice a year to clean fuel system. After 2-3 days of driving it's noticeable and running smoother.One of the best fuel additives out there. Highly recommended and I am not sponsored, this is experience.
robert Chappell
Reviewed in the United States on April 25, 2023
good product. it works. if the engine can start and run
Customer
Reviewed in the United States on September 6, 2022
This product has "saved" quite a few pieces of power equipment. I was given an almost new trimmer that would not start. Added MIB and let sit overnight. I was able to start it the next day and slowly the trimmer ran better and better. I sold the trimmer in a garage sale at a nice profit. i add the product to gas every few weeks and my machines run like new. Most recently I had a power washer that would only run but a minute at a time. Added the product into the carb and let it soak. Runs like new. I have recommended MIB to friends who called it "snake oil". They all are believers now.
Neil
Reviewed in the United States on March 4, 2020
This just works - PERIOD! I use it in all of my small engine equipment.... the best method is to add a few ounces to your fuel can BEFORE you fill it! Now you have conditioned fuel no matter where you use it. I also use REC fuel or Premium fuel exclusively in my small engines as it’s always the fuel that causes no starts.... I use this, REC/Premium fuel and Mobil 1 Synthetic oil... ALL of my stuff starts easily, runs smooth, and LASTS! Choose wisely folks - this stuff is cheap insurance.
Bill
Reviewed in the United States on July 16, 2017
My mower worked fine the first season, but the second season, even after doing all the scheduled maintenance, it was running funny. It would start up fine, but then began stalling after 15 or 20 minutes. I called Cub Cadet and they said it sounded like I had a clogged fuel cap vent, so I bought a new one and that didn't help at all. Just before the 3 year warranty expired I brought the mower in for warranty service. They guy told me that he could take a look at it, but it was probably a fuel issue and the warranty doesn't cover fuel issues, and it would likely cost $180 (for a mower that cost me $250 new). I asked that if it was a fuel issue why did it start up fine and run with no problem for 15 or 20 minutes before starting to stall? He said that likely the automatic choke is on initially, then when the engine warms up the choke turns off and then the mower starts stalling. He said that it is likely that something inside the carb is likely gummed up. He recommended Mechanic-in-a-Bottle. It was expensive for a 4 ounce bottle, but cheap compared to a carburetor repair. I gave it a try and it worked like a champ. No more stalling at all. This stuff is the best.
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