Is it normal for the drive fluid in the indicator bottle to fall ~1/8" over about 10 hours of boating time. I have an Alpha 1 Gen II drive. I didn't notice this on my previous boat (same drive), but my new boat (~70 hours now) does seem to consume some drive fluid. I do not see any water in the drive fluid and there is no external leakage. Also, the drive is not getting abnormally hot.<br /><br />Thanks for the posts in advance!