2000-2005 Yamaha F40B Outboard Service Manual, Page 122Get this manual

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1f.ilI_G_E_N_E_R_A_L _C E_= 3 Measure: Spark plug gap Out of specification Regap
Spark plug Spark plug 17.2 Nm (1.7 m-kgf, 13ft-lb) NOTE: _ Before installing the spark plug, clean the gasket sur

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