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  1. K

    leaking lower unit, 1963 Gale Sea King (OMC) 15hp

    Well, after a day in the barn,I think there is a reasonably happy ending! Thank you all for the suggestions. I bought the motor last fall, ran it once and realized I had some work to do. I think I was flummoxed because there were multiple issues... all the seals were original and completely...
  2. K

    leaking lower unit, 1963 Gale Sea King (OMC) 15hp

    definitely a fan of seafoam, when it works! Much rather be fishing than tearing down a motor... The old 1963 Montgomery ward Sea King looks good on my 1963 Sears boat! Thanks for the timing video. Hadn't seen that- I'll save my 50 bucks for the timing tool and go that route! My motor is a 1963...
  3. K

    leaking lower unit, 1963 Gale Sea King (OMC) 15hp

    Unfortunately, I didn't take photos as I went, and the lower unit is torn down again. At this I think I may be looking at a combination of things- *compression 80 in upper cyl, 85 in lower, so not great.- lot of carbon on pistons, etc. * gear case held 15psi, was able to create small leak at...
  4. K

    leaking lower unit, 1963 Gale Sea King (OMC) 15hp

    Okay- here's the report- took a minute because I had to turn an adapter for the 3/8 machine thread on the lower unit to 1/8-27 npt to connect the vacuum pump... I was able to produce a small leak wiggling the shift rod. removing the bushing and o-ring for the shift rod I confirmed something I...
  5. K

    leaking lower unit, 1963 Gale Sea King (OMC) 15hp

    Thanks for the tip. Pressure testing is all over the forums, but this is the first I've heard about vac testing. I'll give it a try and let you know what happened
  6. K

    leaking lower unit, 1963 Gale Sea King (OMC) 15hp

    Thanks! Whatever is going on is not magic; when I figure out what it is I'll post it in hopes it will be useful to someone.
  7. K

    leaking lower unit, 1963 Gale Sea King (OMC) 15hp

    Just looked at my last post- The sheesh at the end wasn't a response to your post! I appreciate all thoughts. It was my frustration that the unit holds air but something is still leaking, poorly stated. Apologies. I may be dating myself, but I first used 2 cycle outboards in the early 70's...
  8. K

    leaking lower unit, 1963 Gale Sea King (OMC) 15hp

    Hi, Thanks. Yup, replaced the shift o-ring. The oil was definitely gloppy gear oil, and lots of it. The only other observation I have that I left out is that it seemed to be leaking more after the engine was hot. May be that it simply took a while for me to notice the oil as it accumulated in...
  9. K

    leaking lower unit, 1963 Gale Sea King (OMC) 15hp

    I am new to this forum, so hello. I am truly and most sincerely stumped. I have a 1963 Gale Sea King 15hp. I have completely disassembled the lower unit cleaned and re-assembled with all new Sierra seals. The original driveshaft seal was a single seal; the replacement is two seals that I...
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