Oil pressure sensor

[CaptainT]

Has anyone replaced the oil pressure sensor on a
4BY2-180? There is a 3/4” nut on the sensor but I can’t get a wrench
on it. The wrench seems too thick. The bracket has a lip on it
keeping the wrench from going on the nut.
Has anyone tried any other tool?

 

[Brian B]

I changed mine some time ago, the wrench I had fit. They sell slim wrenches or maybe grind yours down so it will fit.

 

[scross]

You might want to read this thread.

viewtopic.php?f=5&t=14629&hilit=Yanmar+oil+pressure+sender

The 4BY2-150 uses the same sender as the 4BY2-180. I used a thin open end wrench on mine with the engine cover loosened up for easier access.