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The original carb on my 31 model 20 had a 170 main jet.and yet the model 18 & Es2s all had 160's
I know the main jet size a minor issue but I'm curious that the parts book list 9194 as the same main jet for the 16H, 18 , 19 and 20 but list no size.
Hi Ian.
I have a 1930 model 20 which is running on a 160 without any problem.