Mercury 75 Service Manual page 187

No Click
Check for battery
YELLOW/BLACK wire at terminal block
on engine when key (or choke button) is
pushed in.
Battery Voltage Indicated
Check for loose or corroded connection between
YELLOW/BLACK wire and black wire (under same
screw at terminal block).
Check that other BLACK wire at terminal block is
properly grounded.
Repair connection(s) as necessary, then push key (or
choke button) in. If enrichener valve DOES NOT click,
replace valve
.
90-830234R3 DECEMBER 1997
IMPORTANT: Use of enrichener if engine is warm
could result in engine flooding.
ENRICHENER VALVE TEST
Push key (or choke button) in.
Valve should click
voltage to
No Fuel Flow from Fitting
Remove upper hose from fitting on enrichener
valve. If fuel flows from hose, replace valve. If not,
check hose and carburetor fitting for leaks or
obstructions.
.
Squeeze primer bulb until bulb is firm.
Remove lower hose from fitting on
enrichener valve. Place a container under
valve, then push key (or choke button).
Check for fuel flow from fitting.
No Voltage Indicated
Check for open in YELLOW/BLACK wire
between key switch (or choke button) and
terminal block.
Fuel Flow from Fitting
Valve is O.K. Check hoses and fittings from
valve to
obstructions.
Click
carburetors for leaks or
FUEL SYSTEM - 3B-25