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• Place a small container beneath the water-fuel-separator drain. Loosen the drain valve until fuel begins to drain from the filter. When the fuel filter/water separator has drained completely, close the drain valve.
Alternatively, a section of fuel line can be attached to the drain valve so that the fuel filter can be drained into a larger, remotely placed container.
• Remove the fuel filter from the fuel filter base. Have a shop towel handy to catch any fuel from spilling during the process.
• Clean the fuel filter base and ensure there are no remnants of old gasket material or other debris stuck to it that could compromise the seal when the new filter is installed.
• Lubricate the o-ring of the new fuel filter with clean engine oil. This engine model features a primer bulb on the fuel line between the tank and fuel pump, so it is not necessary to fill the new filter with diesel fuel; the system will be primed in subsequent steps. However, it is perfectly acceptable to fill the new filter with clean diesel fuel or a diesel fuel additive before installation.
• Install the new fuel filter; tighten snug by hand. Verify that the water drain valve at the bottom of the filter is closed.
• Locate the bleed orifice on the top of the fuel filter base. Open the orifice slightly, then pump the primer bulb until fuel begins to seep from the orifice.
• Close the fuel bleed orifice and start the engine. The engine will run rough until the fuel system is bled completely; this is completely normal. Check for leaks around the fuel filter base and bleed orifice.
• If the engine stalls, repeat the bleed process described above and restart engine. It may take several bleed cycles before the engine will stay running.