Looking for replacement parts for my Yokohama 8500e portable generator. I need a fuel shut off valve and a voltage regulator.

The most common cause of portable generators failing to produce electricity is from the loss of residual magnetism. Generators work by moving electrical conductors through a magnetic field. Your generator does not have magnets. ... When the residual magnetism is lost, the generator will produce no power at start-up.

There are a few methods of restoring a generator residual magnetism

12 Volt Generator Battery Method

Locate the voltage regulator for your generator.Unplug the two wires that connect to the generator brushes. Normally one is red and the other is black or white.Connect the black or white to the generator ground battery terminal.Plug in a light, turn on the generator breaker or switch and start the motor.Connect the battery +12 volts (red cable) to the red wire on the terminals you removed for three seconds.Remove your wires and replace the plug. The generator should now be producing power again.

Make sure you unplug the brush wires from the automatic voltage regulator or you will damage the regulator. Do not contact the voltage regulator or other wires as dangerous voltages may be present that can cause electric shock.

Hi!

We sell this fuel petcock: https://www.generatorguru.com/fuel-valve-petcock-78317950/

If you need any other parts: https://www.generatorguru.com/sc960/

We also have a whole Help Center and Engineers dedicated to helping people fix their Portable Generators. In addition to this we have a "Parts Search Service" if the part is not listed on our site. Check us out on our site. https://www.generatorguru.com/
Parts Spares for Generators and Small Engine Machinery


https://www.generatorguru.com/fuel-valve-petcock-78317950

possibility that the float needle is not shutting off and the fuel is leaking past the valves into the cylinder past the rings into the sump
drain the sump, refill to the correct level and turn off the fuel tap under the tank
if the level doesn't change after a period of time then overhaul the carby and turn the tap off after each use

the ethanol gas has a way of ruining the rubber tip on the needle valve (in carburetor). When the rubber tip on that valve or the rubber on the Seat go bad, gas can constantly want to fill the carburetor bowl. so much so that it runs into the engine cylinder and past the Rings to the crankcase.
You can replace the needle valve and seat in the carb which is best OR you can put an in-line shutoff on the fuel line and turn it off when you are not using the generator.
Ethanol gas.. very very bad for carburetors.

The info your looking for is in the owners manual.

duromax_series_manual.pdf

The info is in the owners manual.

duromax_series_manual.pdf

Your info is in the back of the owners manual.

duromax_series_manual.pdf

It shuts down because it's not making power. You are probably getting a failure to start error code. If it doesn't make power it doesn
t know its running. Rotor has lost residual magnetism to start the voltage regulator. Replace the voltage regulator. The new one is designed to overcome this.

Same. I have one to repair, Most of the wiring for the ignition system is missing, andI cannot find a wiring diagram or workshop manual ANYWHERE.

http://www.cumminsonan.com/locator The A1 controller is likely suspect.