1987 Johnson/Evinrude CU Outboards 35A thru 55 Service Manual, Page 71Get this manual
Carburetor Orifice Plug Reference Chart Orifice part numbers and size are subject to change due to atmospheric conditions, manufacturing changes, and other conditions beyond our controlIt is occasionally desirable to replace carburetor orifices for improved running characteristicsCheck with current Parts Catalogs for orifice plug part numberCheck with current Parts Catalogs or Service Bulletins before making any jet changesThe following charts list available orifices and orifice size and part number identificationThe identification number is stamped on all orificesOrifices (8 -32 Thread Size) 10 No 14 20 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 40 41 42 Part No 331952 324005 326188 328549 323003 324652 317474 322936 322776 317473 318823 320016 320015 324025 318832 323703 324698 323149 327745 328535 325829 Size .014 0.020 0.023 0.024 0.025 0.026 0.027 .028 .029 .030 0.031 0.032 0.033 0.034 0.035 0.036 0.037 0.038 .040 0.041 0.042 10 No 43 44 45 46 47 48 50 53 55 57 58 59 60 61 62 64 66 67 68 70 73 Part No 325828 325827 323151 327342 328560 326500 323708 328531 326928 325869 328280 327739 327092 324977 326856 325837 328526 327689 327740 328562 328536 Size 0.043 0.044 0.045 0.046 0.047 .048 0.050 0.053 .055 .057 0.058 0.059 0.060 0.061 0.062 0.064 .066 0.067 0.068 0.070 0.073