PERIODIC MAINTENANCE Draining and Replacing Lubricating Oil - SD50 / SD50-4T Lubricating oil should be changed while the engine is still warm. CAUTION! Let the drive unit cool at least 5 minutes after operation before removing the oil drain plug. Hot oil could spurt out forcefully if the drain plug is removed from the drive unit immediately after operation. SD50 / SD50–4T (1) (2) Figure 3 1 Dipstick 2 Plug 3 Drain Plug (3) 0005451 40 SD Operation Manual © 2009 Yanmar Marine International