PERIODIC MAINTENANCE SD Operation Manual 37 © 2009 Yanmar Marine International ◯: Check or Clean ◊: Replace ●: Contact your authorized Yanmar Marine dealer or distributor Daily (See Daily Checks on page 23.) 50 Hours Or After 1 Month Every 100 Hours Every 250 Hours Every 500 hours Every Year Every 2000 Hours Every 5 Years Flexible Mount Inspect and/or replace the flexible mount, mounting height ● Replace the flexible mount ●