jmthehermit
Donation Time
Hi Allan, the brown stuff of the float is residue from the fuel and its additives evaporating. The tan colored stuff on the other end is about the same with metal corrosion. Go to an auto parts store and ask it they sell a container of carb cleaner that can handle soaking a carb. It should have about a gallon or so of carb cleaner with a lift out tray. I know they make them but I never had to buy one. On the side of the unit there is a plate with two little screws that shield the internals. Remove the plate and soak the unit until it's clean. Do not use a brush inside it!!!! Do not poke at anything inside either. There is a small arm that runs over a small coil that sends the reading to the guage. Let the carb cleaner work alone. It will come out as clean as mine did. If you have difficulty finding the bucket of carb cleaner, find a small engine repair shop - read lawn mower shop - they should also be able to help you. cheers, Jeff