Mercury Mariner V-250 V-275 Outboard Service Shop Manual 1990, Page 330Get this manual
Installing Oil Hoses to Engine 1Route oit tank holes to starboard side of engineNOTE: Use care when removing rubber plug (a) fromTeeitting (b) as oil may drain from fitting when plug is removed
3Route pulse hose (1) th ru hose clamp (9) to port side of engine
4Remove rubber plug (h) pulse fitting ("i" portside of crankcase cover) and secure pulse hose (I) to pulse fitting (i), using supplied sta-strap (j)