Re: low presure light is on 6hp 2009 four stroke Yamaha
I have never even seen a 4 stroke 6 before but I am sure a service manual would give you info .
I would think pulling the sensor and testing it would be the 1st thing and then hooking a pressure gauge to the port you removed the sensor from would be the next thing, but if it really is low pressure the you might hurt the motor by running it