BEFORE YOU OPERATE Bleeding the Fuel System 1. Check the fuel level in the fuel tank. Refill if necessary. The fuel system has an automatic air bleeding device that purges air from the fuel system. No manual air bleeding is required for normal operation. Bleeding must be done if any fuel system maintenance has been performed (replacement of fuel filter, etc.) or if the engine does not start after several attempts. 2. Open the fuel cock of the fuel tank. WARNING Exposure Hazard. Always wear safety glasses when bleeding the fuel system. 1 3. Loosen the air bleed screw (Figure 4, (1)) 2 to 3 turns. 4.
Push up and down on the manual priming lever located on the side of the fuel feed pump to release air out of the air bleed screw. Always use an approved container to catch the diesel fuel. 2 3 5. Continue pumping until a solid stream of fuel with no air bubbles begins to flow. 6. Tighten the air bleed screw. 4 Note: After engine start-up, the automatic air-bleeding device works to purge the air in the fuel system. 5 6 Figure 4 0004801 1 – Air Bleed Screw 2 – Bracket 3 – O-Ring 4 – Fuel Filter Element 5 – Fuel Filter Housing 6 – Retaining Ring 30 YM Series Operation Manual