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  1. C

    I'm sealant confused

    I have read many posts regarding equivilant sealant to the M 1000 recomended by Johnson in their older books. The local shop here says they use Gel Seal II on the crank case halves. The book also says to put some on the bolt threads when assembling. Is the Gel seal OK or should I try to find...
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    Piston damage

    From a '70 4 Hp Johnson one piston (bottom) looks bad, the other is OK two questions 1)what is possible cause, did not find any thing which could have caused it, rings are fine ect 2) Esitmate how long this was there? engine ran OK, didnt idle real low where you can almost count the revs, but...
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    Oh NO 1 piston or 2?

    Upon inspection of my trusty Johnson '70 4hp I discovered one piston pretty scored up cyl walls look reasonable, little AL deposit on the bottm matching one of the piston scores. and a couple small scratches I can detect slightly with my finger nail. Didnt find what caused it, looked to have...
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    1970 Johnson 4Hp twin

    I have a '70 twin 4 Hp I use on a cannoe I am doing some work and am wondering is I should replace the 36 yr old coils, wires while Im in there. Any other areas of concern I should be addressing, the water pump points, carb I got already. It runs OK I just want it to be reliable when Im way...
  5. C

    1970 Johnson 4Hp twin

    I have a '70 twin 4 Hp I use on a cannoe I am doing some work and am wondering is I should replace the 36 yr old coils, wires while Im in there. Any other areas of concern I should be addressing, the water pump points, carb I got already. It runs OK I just want it to be reliable when Im way...
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