I have a Maxwell 500 windlass with SAE 90 gear oil according to the manual. The windlass is mounted horizontal with the gearbox vertical with an inspection window for the oil. I was thinking of changing the oil but I can't find a discussion in the club's CD or online forum. Has anyone done this? I use SAE 90 oil in the lower unit of my British Seagull hence the impetus to cause trouble. Do I pump it out by removing the inspection window? How much does it take and how do you tell?

John I--
s/v Pooka
C36 TR #1339