Mercury Mariner 4, 5 102CC Sail 1990 Outboard Service Shop Manual, Page 48Get this manual
5Using hose clamp (a)secure fuel hose (b) to barbed fitling of fuel pump (c) Servicing Dual Fuel Supply ComponentsMercury 5
Removal Disassembly
1Turn fu el coc knob to remote position 2Disconnect remo te fuel line from eng ine3Disconnect hoses fro el pump (a), and remote con nector (b)NOT E: Fuel con nector is on-servic eable partInspect or leaks cracks, replace if necessary