I manage a Honda Motorcycle/ATV service shop and we do these machines all day long. This is the only engine that you can't overfill with oil. Since it is a hydrostatic transmission, it's basically a big oil pump. In this case: the more oil, the better.
Run the machine to warm it up for a few minutes, then remove both oil drain bolts, and remove the oil filter. Warm oil drains much faster then cold. After it's done draining fill it back up with 5 full quarts of Honda's GN4 10W30, or the HP4S full synthetic. When you've run it for a bit, and pull the cap from the oil sump, it should be all the way full about to overflow.
When the oil level is too low, (or in this case not as high as possible) the transmission may make grinding noises. Not good.
10w40
Unfortunately there aren't any.
15412-KEA-003
3.6
Just over 5 quarts.
4 gallons
.006" intake, .009" exhaust. Adjusted with engine cold.
This vehicle takes 2.3 quarts If It has the manual shirt transmission.
sitting on it, it would be under the cover with three bolts on it on the bottom right side of the motor
hold the odo and the button right underneath it at the same time for 2 sec.
Let it run and get hot. cut it off and let sit for a few. wipe stick clean, stick it in but do not screw in. check it... oil should between the 2 lines on the dip stick.
just under 6 liters of 10w40 oil with oil filter changed. start by filling with 4 liters then start engine . run for 2 min.s at idle then stop eng. and add oil to level .