1985 Mercury Outboard V-300 V-3.4L Shop Service Manual, Page 81Get this manual
Enrichener System DESCRIPTION
The enrichener system provides the engi ne with ri ch fue charge for slarling ease of cold engineThe system consists of an electrically operated enrichener valve which is connected by hoses to the carburetorsFuel is gravit fed 10 the valve from Ihe noa! bowl of Ihe lOp carburetor via hoseWhen the key (or choke bUlton) is
pushed in (and held in) current is sent to th valve causing it to open, whi ch allows fu el 10 pass thru The fuel passes thTu hose and is supplied to the engine via fillings located in th intake manifold of the middle and bouom carburetors When the key (or choke button) is released, th valve will re turn to the closed positi onThe valve call be operated manually valve fails to operate electrically
ENRICHENER VALVE TEST
Push key (or choke button) InVelve should click
No Click Check for battery voltage to yellowlbtack wire at terminal block on engine when key (or choke button) is pushed in