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  1. Yesterday

    Merc 850 Carb Differences

    Does anyone have any idea what the differences were between the 1975 and before Tillotson carbs for these engines and the 1976 & up mercarbs? I'm wondering if they can be interchanged, and if so was one larger or smaller than the other? Thanks all.
  2. Yesterday

    gas leak at full tilt.

    I was out on the weekend and had to beach momentarily. The water was very shallow so I ran the tilt on my Merc 850 up full. I have no limit switch and I'm not sure if that's supposed to limit upward or downward tilt? At any rate after a few minutes there was gas leaking from the power head...
  3. Yesterday

    Compression.. Thoughts?

    SO I finally rebuilt every other flippin part of this motor (Merc 850) and here is how the power head looks after running and then cooling down some: 130 145 140 145 I know the other 3 are fine, but how suspect is that #1 cylinder? Would you run it like that?
  4. Yesterday

    Merc 850 Shift shaft

    So I've now gone though my Seloc manual power head section twice, and there seems to be no description pf power head re installation so I'm wondering if there is a simple way or a standard procedure to align the shift shaft? Currently the gear case is in neutral. TIA for any useful help!
  5. Yesterday

    Hull Hook Repair

    I have an old Chrysler tri hull I've been rebuilding for a number of years. I had it on the water for two seasons when I discovered something nasty. Because it sat for years with the transom hanging over the bunks of the trailer and had a large O/B motor installed. The transom sagged by about...
  6. Yesterday

    L/U Zinc Anode

    I've noticed there is a second set of threads at the prop end of the lower unit casing on my merc 850, outside the spanner nut. I'm wondering if they're there for mounting a zinc anode of sorts? I've tried to find one and nothing seems available, yet it would seem a perfect spot for one. Am I...
  7. Yesterday

    Simple Skeg alignment question

    Should the an outboard's skeg be perfectly in line with the remainder of the lower unit? Or does it have a slight angle to offset for prop spin? I'm guessing there should be no angle but I just want to confirm this before I start persuasive surgery. (Rubber Mallet) :D
  8. Yesterday

    PT&T Question

    New issue, new post! I'm setting up to test my PT&T and have scoured the net. I found a manual for these units only to find it has no hose connection instructions. its the earlier 4-hose, 2 ram Type A I believe. Neither it seems, does my seloc manual. It's like they all assume you know which...
  9. Yesterday

    War with lower unit

    I've started attempting a lower unit rebuild on a 1975 Merc 850. I've read a bunch of related threads and was prepared for a struggle with the probability that the drive shaft is corroded to the crank. It came down around 1/4" and then stopped. Using the wedging principal, some elbow grease and...
  10. Yesterday

    Lower unit question

    Hi folks, long time lurker first time poster here. I have I believe, a 1976 4cyl Merc 850 Canadian serial number 7071854. The lower unit is leaking like a sieve and there is a local 1982 50HP 4cyl available quite cheaply because the power head is shot but lower is OK. Is there ANY chance this...
  11. Yesterday

    Lower Unit Shims

    Hi all. I'm working to build one lower unit from two, and have two older style (Chrysler) Force lower units from I believe to be 125HP's. I've read a great thread on the disassembly of those, with great input from Frank, but he spoke of shims under the upper bearing on the drive shaft (single...
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