Sta-Bil Marine Tune-Up Fuel Treatment Marine Tune-Up by Sta-Bil is a fuel treatment designed to clean carbs and injectors. The special formula is compatible with all gas marine engines and quickly resolves rough-running engines by dissolving varnish and gum build up. Perfect for small boats and PWCs that could use a tune-up throughout the season. Features Treats 20 Gallons of fuel Dissolves build up Compatible with all gas marine engines Excellent mid season tune-up Application Instructions Sta-