My full mark is the same as yours but its length is still 1/4" shorter than Gene's book says it should be.
The manual gives motor capacity as 5 and 1/2 Qts. For refill, 5 Qts ( approx . 1 pt. remains in the system.)
After all this work, I'd like the oil level to be as accurate as possible.
Appreciate the tip and quick reply.
By the way, putting the rear end up all night on jacks did nothing to bring my empty freewheeling level back up after I mistakenly overfilled the U-joint. So I drained the U-joint but left a few oz., then re-filled the freewheeling unit from the top to the proper level. Should be good now. Maybe under way, the 600w sloshes around between the 3 units and seeks its own level.