1998 Johnson Evinrude EC 5 thru 15 HP Four Stroke Service Manual, Page 177Get this manual
0.307 in:t 0.002 (7,8 mm:t 0,05) 0.Q16 in (0,4 mm)
1.004 inI (25,500 mm)
Exhaust
'If (7,8 mm :t 0,05) ;'0.016 in(0,4 mm)
0.307 in:t 0.002, ""'-