Tohatsu 4 Stroke MFS 2/2.5/3.5A Outboards Service Manual, Page 53Get this manual
Maintenance 16) Flushing with Water
CAUTION
Touching rotating propeller could lead to injuryBe sure to remove propeller before running engine on the land
WARNING
Exhaust gas contains carbon monoxide, which will cause gas poisoningDo not start engine with outboard motor placed in closed area such as boat houseFlushing with water using flushing attachment (hose adapter) 12Remove propellerRemove water plug of outboard motor, and attach flushing attachment 1
Put water hose on flushing attachment and run waterSet shift lever to neutral (N) and start engine
Check that cooling water check port discharges water, and run engine for to minutes at low speed1Flushing Attachment (optional)