Yanmar KANSAKI KM4A Transmission Oil Change
I have two Yanmar 4JH3-HTE engines with the Kansaki KM4A transmissions. When changing oil in the past, I have inserted a hose down the oil fill / dipstick hole and sucked the oil out. I have not been able to get all of the oil out.
On the starboard side of the transmission, there is a 26mm plug that I think is designed as the drain plug. The clearance to get a socket/ratchet seems too close. A wrench big enough will not have room to rotate.
Anyone have success with a socket or other way to use the plug?