Re: 1986 Merc 135 OIL INJECTION DISCONNECT
I would remove the pump and all lines and check valves. When you remove the pump there is a plug kit that plugs the hole, from Merc about 15.00 I think. The inportant thing about the plug kit is that it holds a bushing in place. When the bushing comes out it does bads things inside the engine. This information is second hand and may not apply to all Merc engines.