1990 Johnson Evinrude "ES" 40 thru 55, P/N 507872, Page 51Get this manual
Carburetor Orifice Plug Reference Chart It is occasionally necessary to replace carburetor orifices to improve running characteristics Check 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 size, and part numbersThe identification number is stamped on most orificesOrifices (8-32 Thread Size)
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
Part No325828 325827 323151 327342 328560 326500 333741 323708 328531 334014 326928 333982 325869 328280 327739 327092 324977 326856 325837 328526 327689 327740 328562 328536