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Carb parts stromburg O-3 1926 Lincoln


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Posted

Check the inside jam nut that holds the fuel inlet bulkhead where it enters the bowl (the seat part of the needle & seat), its a brass jam nut and easily cracked, people overtighten them to prevent leakage.  The crack will be hard to see and will let fuel into the bowl bypassing the seat.  There should be an acorn cap nut threading onto the shaft protruding the float bowl cover, that is your float adjustment.  They don't have but a few gaskets, machined fittings with tapered sealing seats, been a while but there might not be any gaskets in them.

Posted
46 minutes ago, ojh. said:

Check the inside jam nut that holds the fuel inlet bulkhead where it enters the bowl (the seat part of the needle & seat), its a brass jam nut and easily cracked, people overtighten them to prevent leakage.  The crack will be hard to see and will let fuel into the bowl bypassing the seat.  There should be an acorn cap nut threading onto the shaft protruding the float bowl cover, that is your float adjustment.  They don't have but a few gaskets, machined fittings with tapered sealing seats, been a while but there might not be any gaskets in them.

Thanks for the info. I’ve got it apart now, seems to be only round gaskets on dome of the plugs. It could be they were added long ago. 

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