Certainly didn't work for me
Read all the reviews and purchased fast fix for my rough running petrol lawnmower. Had replaced the air filter, spark plug etc and knew that the carb was likely the cause of the rough running so purchased this to clean it up.
Carefully read the instructions and put the required amount into the tank and topped up with fresh fuel. Started up and let it run for the recommended 15 mins and all seemed good. Turned off and put away until needed the following day. Next day the mower refused to start!! Despite dozens of attempts over 2 days dead as a very dead thing. Changed the spark plug (again) and checked everything else. Not suggesting this product killed my machine but it certainly didn't help it. Had to purchase a new mower. Won't be putting this stuff in the new one.
Date of experience: July 02, 2023