if you can’t find the parts stuff it with wraps of dental floss or similar  greased fiber

the kit should fit  did you screw down the brass barrel tight..

vintage outboard.com has  kits  Sierra  18-7043  for 2-20hp

18-7043 – Johnson/Evinrude Carburetor Kit (OE or Sierra Kits (shipped – VintageOutboard.com

I too have had some problems with those fibre packing washers. I bought a cheap generic carb kit on Amazon that came with float and a bunch of unidentifiable stuff for most motors up to 18 hp. The washers would not fit either jet. The float had to be modified to fit. The brass float needle thing had the wrong thread (probably metric). Now this kit cost $15.00. each. So I sent them back and ordered  better kits for a total of $10 more. When it finally arrived, late, I discovered they were exactly the same kits but from a different supplier. Not sure the washers fit either. So I ordered just the packing washers from Sierra directly. Ten in a pack alone cost me $15.00 and they are identical to the ones included in the offshore kit.

It seems that carb kits have gone the same way as the points kits. Useless.

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The Boat House

JohnRude wrote:

I too have had some problems with those fibre packing washers. I bought a cheap generic carb kit on Amazon that came with float and a bunch of unidentifiable stuff for most motors up to 18 hp. The washers would not fit either jet. The float had to be modified to fit. The brass float needle thing had the wrong thread (probably metric). Now this kit cost $15.00. each. So I sent them back and ordered  better kits for a total of $10 more. When it finally arrived, late, I discovered they were exactly the same kits but from a different supplier. Not sure the washers fit either. So I ordered just the packing washers from Sierra directly. Ten in a pack alone cost me $15.00 and they are identical to the ones included in the offshore kit.

It seems that carb kits have gone the same way as the points kits. Useless.

So far I think the Genuine OMC carb kits re OK.  All the right components and good quality.

Marine Engine lists them all here:

https://www.marineengine.com/parts/brp/johnson-evinrude-outboard/carburetor-kit.html

You can observe their pricing for the genuine kits and if someone is selling you something for a lot less……it’s probably not going to be what you need and want.