Re: Oil tank sensor plug and harness on my engine not matching up(pic)
You have made some errors in you assumptions on what things are.
Slow down, read on here, and get some of the basics first.
Now, the four pin half round connector is the engine harness side of the VRO fuel pump. If that is disconnected, it usually means that someone has disabled the oil mixing function of the pump, and is mixing the oil and gas manually. That's what it USUALLY means.
It could be that someone unplugged the harness to shut that alarm off. UNplugging that harness disables the alarm system from detecting a NO OIL condition. You will see a tan/(stripe color?) which is the NO OIL sensor line.
At any rate, you should immediately begin mixing your gas with TCW-3 oil at a 50:1 ratio. Do that until you prove oit the oiling function of the VRO pump. Plenty of posts on here about how to test that.
Regarding the alarm system, disconnecting the tan sensor wires throughout the engine will not cause the alarm to sound. Disconnecting those wires disables the function and will never cause the alarm. If you have a constant alarm, one of the tan sensor wires is shorted to ground, either by wiring fault, or a bad sensor itself. Disconnect one at a time to find the bad line.
Other possibility is that the horn itself is bad. They fail in the ON state too.
Your factory service manual will show all the sensor wires, colors, etc. Tan or a combination of tan with a stripe are the sensor wires.
Now, the oil tank. That tank is a tank from a Ficht direct injection engine. They use an oil return line, which is that line that has the yellow stripe in it. It will work fine for you, just plug off the return.
Now post #6 you say "cold start injector"......nope. It is a primer solenoid. It is simply an electrically controlled valve that allows fuel to be supplied to the engine for cold start. The fuel shoots into the intake directly right behind the carbs. Function is equivalent to an old choke. The red lever must be aligned with the black solenoid body, the end pointing to the opposite end of the black solenoid body, for normal operation. That lever will NOT flood the carbs with oil. If you have nothing but oil in the carbs, look to the fuel pump not delivering gasoline to mi9x with the oil it is pumping.
You have alot of work to do. Don't run it without 50:1 in the tank!!!!