Yamaha Oil Injection System

Macojoe, To test the shut off float switch on the engine oil tank, all you have to do is take the float assembly out of the tank and remove the strainer - then slide the float all the way up. if the upper float switch is working correctly - the remote tank pump will stop. If you slide it all the way down then alarms go off. at an in between position - a switch tells the remote pump to pump.

When you put the float assembly back in the tank, make sure the arrow and notches line up. The outlet nipple on the float switch/strainer assembly must sit in the very bottom of the tank outlet hole or else the float can bind. You can feel that it is in the groove by wiggleing it side to side. Good luck!