1990 Johnson Evinrude "ES" Colt/Junior thru 8 Service Manual, P/N 507870, Page 53Get this manual
Carburetor Orifice Plug Reference Chart It is occasionally necessary to replace carburetor orifices to improve engine running characteristicsCheck current parts catalogs for orifice part numbers
INotel Check current parts catalogs and service bulletins before making any orifice changesThe following charts list available orifices, orifice sizes, and part numbersThe identification number is stamped on most orificesOrifices (8-32 Thread Size) ID No0 14 16 20 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 ID No290 340 370 380 390 400 420 430 440 450 460 470 490 500 510 520 530 540 550 560 570 580
Part No333342 331952 333243 324005 331934 326188 328549 323003 324652 317474 322936 322776 317473 318823 320016 320015 324025 318832 323703 324698 323149 334568 327745 328535 325829 Part No330142 330141 328537 328525 328538 328524 322249 328539 328540 323280 328541 328542 324020 326526 331567 321108 321297 321407 320921 318684 322907 328543
Size 0.000 0.014 0.016 0.020 0.022 0.023 0.024 0.025 0.026 0.027 0.028 0.029 0.030 0.031 0.032 0.033 0.034 0.035 0.036 0.037 0.038 0.039 0.040 0.041 0.042