Mercury Mariner V-250 V-275 Outboard Service Shop Manual 1990, Page 308Get this manual
Installing Engine Well Inlet Cover 1Cut out inlet cover template from center of these inst ructions2Locate template at desired location and dri ll holes thru mou nting surface as indicated on template 3Install inlet cover (a) along with gasket (b) Secure with four 10-32 screws, lockwashers and hex nuts (e)(Cut off excess screw length
to help protect pump and wiring from adverse weather and water spray
Selecting Mounting Location For Power Trim Pump
,1Powe rim pump can be mounted two ways, either 1) on sideof an internal bulkhead using mounting bracket supplied it pump or 2) using optional floor mount bracket