Small Engine Troubleshooting Problems? Ask a Mechanic Now.
Welcome to JUST ANSWER small engines, let me try to help you !! I don't know it all, but maybe together we can get you a satisfactory answer!
What was original problem, that you replaced the solenoid? There is an electric fuel solenoid at carburetor, that can be shorted out. And the voltage regulator could cause short. And as for having nothing now, use voltmeter or test light to check the fuse holders, as they can melt and not make the connection when new fuse is plugged in.
Was fuse blown ?
Fuse holder may be melted and now no power to key. That would keep keyswitch from getting voltage. Then test fuel solenoid for short, and voltage regulator. You can test by unplugging them one at a time to isolate short. Also go back to the solenid and check it. You have already tested solenoid and starter, by jumping solnoid, but could wiring be wrong at solenoid? Wire to fuse has to be on the positive battery cable terminal at solenoid, and nothing but starter cable on opposite cable connection.
Fuel solenoid is at the carburetor base, voltage regulator is on the external engine shroud, toward the side of engine. see links below. Red wire with square box, below it, regulator. Second picture shoe the fuel solenid, yours will be similar, below the air cleaner,.
Arm switch will keep starter from being engaged. Do you have volt/ohm meter to check the fuel solenoid for being shorted to ground?
meter about $10 at retail or auto supply, less at Harbor Freight. Meter will have instruction, but set meter on ohs. touch leads together to see how meter works when leads are connected (continuity) . The use back lead to the body of the fuel solenoid, , red lead to the wire connections, there should be no continuity between the two . If there is , the fuel solenoid is shorted out, and needs to be replaced.
let me know, we can go from here.