This is probably one of those maintenance items that is routinely forgotten or overlooked. The manual says to change the oil every 50K, wonder how many have actually been done.

In case you haven't done it, there is a plug on the left side that drains the oil and a plug on the right side that is the level indicator. After draining, just fill until oil starts to come out the level plug. Check the vent tube also to make sure it can breath.

At the very least, check it for oil.

CIMG0028_1.jpg