How to turn off the fuel pump solenoid?
1 st, ground the black lead (12V NEG)… 2 nd, Put 12V POS to the RED lead—you’ll “see” a 1 amp spark when you do it, but that is all… Now, with those leads connected, PUSH the solenoid in to the “HOLD” position… This is what keeps your engine running and HOLDS the injection pump fuel lever in the RUN POSITION. This runs off the engines IGN circuit…
When to disconnect the jumper from the solenoid?
Disconnect the jumper on battery negative. The spring should return the solenoid to the fuel off position. If the solenoid passes this test the solenoid is good. Note high amperage is generated when using the jumper on the white pin.
How to hook up a solenoid to a battery?
1) Grab your old solenoid and get a 12V battery & some 12 AWG test leads — Go to your bench.. .. Cut the Black wire off the plug ( as close to the plug as possible) and install a GOOD 1/4″ Heavy duty ring terminal on the end..
How much power does a fuel solenoid use?
This is what keeps your engine running and HOLDS the injection pump fuel lever in the RUN POSITION. This runs off the engines IGN circuit… The solenoid, in this mode uses about 8-12 watts of power and over a few hours will heat up to about 120-160F sitting on a bench overnight. The solenoid will hold in this position until power is disconnected.
How does the fuel shut down solenoid work?
I thought I would start this thread regarding testing these components when troubleshooting. The fuel shut down solenoid turns the fuel on and off. It contains 2 coils which are powered separately; the pull coil and the hold coil. The pull coil is energized thru the fuel shut down relay.
What happens when you shut off the solenoid on a lawn mower?
Shutting the fuel off and starving the mower is also a good idea. The solenoid simply shoves a bung up the main jets rectum. What the dealer was alluding to was a float valve failure which will allow the float bowl to overfill. When this happens fuel passes through the bowl vent and then dribbles down the carb throat & into the cylinder .
Disconnect the jumper on battery negative. The spring should return the solenoid to the fuel off position. If the solenoid passes this test the solenoid is good. Note high amperage is generated when using the jumper on the white pin.
When do I turn the key from the fuel solenoid?
You should hear a click when you turn the key to the run position (don’t crank just run position) from the fuel solenoid. This click is the fuel solenoid opening. You can also bench test this with 12 volts. I’ve even used a 9 volt battery.