BRPOEM Johnson Evinrude Carbon Guard 12-oz Bottle 0775629

Go by the instructions, add the correct amount in the fuel, I heard you can put too much which will damage the powerhead, it will protect the piston rings and cylinder walls used as directed.

I purchased a 20 yr old boat with a Johnson 50 hp. The motor ran like a out of balanced paint shaker, and I discovered it had 100 psi in one cylinder, and 60 in the other. Took a year of treatment (about 25 gals worth) but now it purrs like a kitten with 100 and 90 psi readings.

I have used this stuff for years in boats, dirt bikes, motorcycles and classic cars. I can leave something parked for years and not even have to clean the carburetors, and my engine internals are always clean when I do break down my engines. Also, I have used other products when I wasn't able to get this, and they suggest a much richer mixing ratio than Carbon Guard; so a bottle of Carbon Guard will last me longer, too.

This is designed to prevent carbon buildup in two stroke outboards. It will not remove existing deposits. It is important to decarbonize your engine before starting to use this product. Decarbonize with OMC Tune-Up In A Can first.

Good price compared to the marina

Prompt delivery, good product!

good price, never used it before, it was recommended by a friend as a good additive.

I expected to receive the Johnson Evinrude product like that advertised in the picture and description but instead received a knock off version, "OMC SysteMatched Carb X." Disappointed!