1979 Evinrude Outboard 2 HP Model 2902 Service Repair Manual P/N 5423, Page 17Get this manual
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POSSILE
4POOR PERFORMANCE ON (Providing motor is running )
SPARK PLUGSee Section Cover or irmer termina1 damaged (spark plug terminal out of H.T.lead) Fau1ty lead Looselow torque In