Re: 1957 Johnson 18HP FD-11 water pump HELP! Home › Forum › Ask A Member › 1957 Johnson 18HP FD-11 water pump HELP! › Re: 1957 Johnson 18HP FD-11 water pump HELP! londonfluReplies: 5Topics: 1 February 25, 2018 at 7:46 pm #71607 @FrankR, I had the drive shaft in but nothing else would line up, so back out it went. This is quite frustrating to say the least. Also, their was no o-ring on the drive shaft when I dropped the lower unit. Maybe it’s still in there?