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    78 Johnson 115 water pump kit ?: unidentified oring / is Factory diagram exact?

    This is my first work on a lower unit, so I'm inexperienced with boats with a fair amount of auto experience/heads/valves/trans/swaps. I bought a sierra water pump kit for a Johnson 115 (​115ML78C) and the factory diagram shows no oring between the impeller and the impeller plate below it...
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    First time LU install tips, is this Mechanical or hydro: 78 Johnson 115ML78C

    Is mine mechanical or hydro? Shop manual shows two different set ups. It seems like it's mechanical - it has a shift rod where the hydro pictured in the manual does not, am I looking at that correctly? Any other tips for a first time used lower unit install? What equivalent...
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    Used LU driveshaft does not turn, prop shaft does - 1978 Johnson 115 LU

    My LU failed so I got a "working condition" used 1978 Johnson 115 lower unit. The driveshaft doesn't turn by hand no matter what position I put the shift rod in. I put a large monkey wrench on it - and no movement. What next? What position of the shift rod should allow it to turn? Looks like...
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    Engine turns but prop doesn't (*the prop is not the problem*)

    1978 115hp Johnson on a Glastron. Unfamiliar with boats but do car/engine/trans stuff all the time. Very light pressure from two fingers will stop the shaft from spinning even as the motor is turned by hand. No noises. *I assume this is a problem and the prop shaft should be direct connected...
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    Help on vacation! Turn key and nothing happens - wait awhile and it'll turn over?

    New person, Hi! On vacation and would love to get this boat running, this is my first time ever using a boat, though I have been working on this one for the past week or two and test drove it Saturday at home. I've looked through no-start threads but haven't found this situation. 1978...
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