1978 Johnson Service Manual 6 HP Outboard Motor Service Repair Manual P/N JM-7804, Page 15Get this manual
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TROUBLE TROUBLE 1 (CONT)
2LOSS OF POWER(Providing Ignition )
FPOWER HEADSee Section Carburetor not synchronized Thrott1e contro1 1ever (won't advance) Air 1eak at manifo1d gasketswa