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  1. R

    Spark color Blue vs yellow

    what would cause a plug to spark yellow vs blue? 1959 18hp Johnson.
  2. R

    18hp Johnson jumping out of gear

    Had to get a new account could not get my old one back. Motor jumps out of gear when throttling up. Have read some of the files on fixing this and tried to adjust the shift linkage today with out success. This is a 1959 Johnson 18hp I have reworked everything on this motor except the lower unit...
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