Coming up to about 3 years owning my
used boat. It has a
Yanmar 4JH-TE with a KBW20 or KBW21
transmission. I was thinking about changing the
marine gear lube
oil. Looks like I should be using ATF fluid.
I can't really find any
documentation on how to change the fluid. Is there a drain
plug at the bottom of the
transmission? Is it as simple as opening it, letting the fluid drain and replacing? Or do I need to
pump it out through the dip stick, then replace? Is there a way to clean out the old fluid before adding new fluid?
Thanks for your help!