Reply To: 54′ 10 hp Johnson overheat

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December 1, 2019 at 12:57 pm #188370
JACQUES
Participant

    I think you should fix that Heli-coil insert for one of proper size which does not extend into the cylinder (mine was about 5/16 no more )

    it should line up with the plug base. clean the threads of any oily deposit, reinstall properly with red locktite , punch it in with the punch tool

    I would wait a few hours then install that sparkplug

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