to chang the filter is very easy so dont wait so long next time!! unplug the water sender then remove the filter, i always dump the fuel into something to see if there is any water in it, then remove the drain valve from the bottom of the filter, replace the oring and reinstall drain valve in the new filter. remove the small oring from the filter stud on the filter head if it didnt fall off and install new oring, fill the filter with clean fuel and install filter, the filter must be filled with fuel!!! and dont forget to plug in the water sender in on the bottom