Our SeaPro 2100 had been running rough on and off for a few months. After replacing fuel lines, filters, primer bulb and spark plugs we still could not figure out the solution. Considering the fuel tank had been in the boat since new and had never been polished we decided to go for it. We called 3 fuel polishing services in the Cape Coral area, only one replied… Chris Hill from Advanced Fuel Solutions, LLC. In fact, he and his coworker came out that very afternoon, polished the tank and the photo shows the before and after. What a difference! If you look closely, the jar on the left shows about 3/4″ of crud at the bottom. After polishing and one more filter change the boat is reliably running great! If you need fuel polishing in St. James City, Bokeelia or Cape Coral we recommend Chris at Advanced Fuel.