Suzuki 2003-2007 DF60 DF70 Outboard Motors Service Manual, Page 40Get this manual
PERIODIC MAINTENANCE
BREATHER HOSE AND FUEL LINE
Inspect initially after 20 hours (1 month) and every 50 hours (3 months) thereafter Replace every yearsIf leakage, cracks, swelling or other damage is found, replace the breather line andor the fuel line
LOW PRESSURE FUEL FILTER
Inspect every 50 hours (3 months) Replace every 400 hours or yearsIf water accumulation, sediment, leakage, crack or other damage is found, replace the fuel filter