1990 Johnson Evinrude "ES" 60 thru 70 Service Manual, P/N 507873, Page 54Get this manual
Carburetor Orifice Plug Reference Chart It is occasionally necessary to replace carburetor orifices to improve running characteristicsCheck current parts catalogs for orifice part numbersINotel Check current parts catalogs and service bulletins before making any orifice changes
The following charts list available orifices, orifice size, and part numbersThe identification number is stamped on most orificesOrifices (8-32 Thread Size)
0 14 16 20 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42
0.000 43 3333420.014 44 331952 0.016 333243 45 0.020 324005 46 0.022 331934 47 0.023 326188 48 0.024 328549 49 0.025 323003 50 0.026 324652 53 0.027 317474 54 0.028 322936 55 0.029 322776 56 0.030 317473 57 0.031 318823 58 320016 0.032 59 0.033 320015 60 324025 0.034 61 0.035 318832 62 0.036 323703 64 324698 0.037 66 0.038 323149 67 0.039 334568 68 327745 0.040 70 0.041 328535 73 325829 0.042 Orifices (-20 Thread SizeType) Part NoSize 10 No330142 330141 328537 328525 328538 328524 322249 328539 328540 323280 328541 328542 324020 326526 331567 321108 321297 321407 320921 318684 322907 328543 0.029 0.034 0.037 0.038 0.039 0.040 0.042 0.043 0.044 0.045 0.046 0.047 0.049 0.050 0.051 0.052 0.053 0.054 0.055 0.056 0.057 0.058