I just bought an apache model j8 on ebay. I got it running fine but when i took off the skeg plate to the lower unit i found that the gear housing was filled with water and grease. I would expect to find the 90 weight oil with water to make the melted butter type consistency. Do these lower units take grease instead of normal lower unit oil? If it does take grease, is just normal wheel bearing grease ok or does it take a special kind? Thanks in advance!!!!