I have read the factory manual, and have searched here. I was just hoping to get some advice and opinions:
I recently replaced all the bellows, gimbal bearing, etc. (After having done it just 3 years ago... cheap bellows degraded - used all quicksilver stuff this time). I discovered a small amount of gear lube in the bellows, coming from the upper drive shaft yoke.
I bought a new seal, and will beg/borrow or buy a tool to get the big retainer nut off. Most likely I will get a new stub yoke, and u-joints at the same time. But, once I do get it apart I am not exactly clear on what needs to be done to replace the seal.
Looks like there are two possible bearing setups. With or without the "small spacer", which have differing repair procedures.
So, here's the specific questions:
1) boating season is short here. Almost over, I just got the drive back on the boat, topped up the gear oil (was only a little down and not milky), and would really prefer to just drive it for the few hours we will probably use it this late summer (perhaps 5-10 more hours, freshwater lakes). Then pull the drive when I store it and r&r the seal then. Opinions? Check oil at every trip of course.
2) When I pull it - do I have to somehow mark the gear positions so the teeth match up exactly upon reassembly? If so, how? I can see how I could mark the "vertical" shaft, but how can I be sure to get everything exactly back to where it came out? How important is this?
3) The drive is an early 1984. Merc 120, 4cyl. What are the odds I have the easier "small spacer" setup? I do not have an in-lb torque wrench, but I could get one if I have to I suppose.
Any tips on this job? I see many posts saying its not a bad job at all. I would probably plan on getting a new short yoke, as its apparent that the u-joints and shaft are rusty (this happened before I owned it - its been rusty for as long as Ive had it, but is probably now worse).
I look forward to and value all opinions.