Basic checks on batteries, fuses, and heaters are a key component to include in annual spring maintenance. Below are some tips to help keep your power systems running optimally, including checking fuses, tightening and cleaning battery connections, and diesel heater filter maintenance (Northwest Edition boats only).
To verify the fuses are not the source of a problem, use a multimeter on the continuity function setting. Also, you can visually inspect the fuse to see if it’s intact; if the fuse is broken or burned, it needs to be replaced. Make sure to use the correct amperage when replacing fuses. When finished, make sure your bilge pump fuse or fuses are properly installed.
Remove the 4 Phillips screws on the black box containing the heater’s filter and pump.
Inspect the filter. If the filter is completely full of fluid, it is due to be replaced. If it is not full, it is good practice to replace annually.
Remove the two hose clamps on either side of the filter using a Phillips screwdriver.
Remove the hoses from the filter and install the new filter. When replacing, make sure the new filter faces the same direction as the previous filter.