20-25-30-35 evinrude outboard question

[bone2711]

Can someone please tell me what the difference is in the bore diameter of
the carburetor from these four motors. I know the body is identical on the
outside but there must be some difference inside if the carburetors use all
the same parts except the jets. I am ***uming that the bore of the 35 hp.
must be larger to allow more air in with the increased amount of fuel
delivered with the larger orfice. If there is a difference in size could you
let me know what it is? I am specifically talking about the 1989 evinrude 35 hp. carburetor size. any info. appreciated. AL

[highcountry]

See if the part numbers are the same for the 20 and 35 if so the difference is in the cylinder bore and jet.

[bone2711]

All of the internal engine parts are identical on all motors. right down to the part numbers. I cannot find any part number on the carburetor body online to indicate a difference. they could be the same but I doubt it if the different hp. ratings all take different jets. there must be an addition of air from somwhere. I do know that the intakes are different. maybe that if the only difference to increase the air amount?