OEM BRP Johnson Evinrude Engine Tuner Tune-Up 13 oz Spray Can 0777185

This stuff works great. On everything. Used a whole can as directed on my FICHT engine. There already was much less smoke near the end of the can. After letting sit for 24 hours there was some smoke at higher RPMs as the residual carbon was being burned off. There was black oily residue on the grass by the exhaust from the carbon. Boat engine ran so smooth after. I also used this to clean the carbon deposits off my piston and cylinder head of my lawnmower when I replaced the head gaskets. Dissolved it right up. I will order more and use this on not only my boat yearly, but also on all my small engines.

I have a 96 Johnson 90hp outboard and I've done a few things to try and get it running happier at idle instead of dying. Before trying this I'd done Seafoam and other fuel treatments, and replaced the plugs and wires. Ran better but I still felt there was something lacking. I bought this engine tuner on a whim based on the great reviews but I was skeptical, figuring it would be no different than Seafoam. Not so. Ran the whole can through the carb throats as the instructions state, which took about 15-20 minutes. Couldn't spray much at once since it would bog down the engine. Still wasn't sure there would be much change. Then allowed it to sit overnight and ran it again 15 minutes the next day as instructed. Well, I'm giving it 5 stars. Engine runs smoother at idle and doesn't want to die on idle in the water like it used to. Well worth the money and I highly recommend it. I think it runs quieter now at all RPMs so the wife is happier too. I'll probably make this part of my annual maintenance going forward.

This product was recommended by a fellow motorcycle tinkerer and I couldn't be happier about the results. For carb rebuilding, let all of the small brass and screws soak in a bowl for 30 minutes and that's all it takes. Most of the time I don't even need to go to the ultrasonic tank. 5 stars

I had been having problems with my 150 HP Johnson outboard motor maintaining an idle, hunting and an occasional back fire. A boat mechanic recommended I try this engine tuner spray before I bring it into him for repair. I the ordered the Johnson’s Engine Tuner off of Amazon, received it in a few days, followed the directions on the back of the can. Wow!! What a difference it made, I’ve never had this engine run this good. I will be giving this engine treatment on a yearly basis to both of my outboard motors.

Tune was good

As always a great product. you spray this in your carburetor turned over a little bit without starting it. just so the system The product gets through the carberator system it will clean the carburetor. if it's full of dirt and debris you will probably have to clean the carburetor. but gum situations from letting it sit works phenomenal.

Good company

Spray in your small engine to help it start.

Très bon

Great product for cleaning carburetors.

I used it to clean the carburetors on my bike and boat as well. Both are running like new again.

Excellent product, especially for decarbonizing old engines.