I bought a cheap $38 carb a few years ago . I took it apart today . The screws and such were not metric and consistent with what would come is a cheap rebuild kit . None of the screws had thread locker applied and removed easily .
The top half bolted to an old MS bottom and the bottom half to an Old MS top . The shafts , choke plate , screws . needle , seat interchanged .
The sintered drain appears the same size . I did not remove it since it is swedged in place and would probably destroy the base trying to remove it intact . The hole in the new carb drain is about .035 where the MS carb is about .200
I did not remove the jets .
The float is some kind of plastic . May be good if it is fuel / ethanol resistant . It is not going to collapse .
The Venturi is very sloppy cast zinc ? The air flowing through it looks ok , but the air seal for the air flow around it looks likely to leak vacuum .
The biggest problem is there are NO seals on the shafts . Just a snug fit to the base metal .
The drain plug has the right thread count but is not tapered . A pipe plug may work . I would want to tap it first . The fuel inlet was also in issue but could be used with a little help .
The needle has a rubber ? tip and a spring loaded ball on the float end .
The ports to let fuel enter the main jet look very restrictive compared to the MS carbs . They are one drilled hole on each side , 2 total .
I would say they are good parts donors . They would probably be OK for a few years IF you overhauled them first , but nobody wants to buy a new carb just to rebuild it first .
The top half bolted to an old MS bottom and the bottom half to an Old MS top . The shafts , choke plate , screws . needle , seat interchanged .
The sintered drain appears the same size . I did not remove it since it is swedged in place and would probably destroy the base trying to remove it intact . The hole in the new carb drain is about .035 where the MS carb is about .200
I did not remove the jets .
The float is some kind of plastic . May be good if it is fuel / ethanol resistant . It is not going to collapse .
The Venturi is very sloppy cast zinc ? The air flowing through it looks ok , but the air seal for the air flow around it looks likely to leak vacuum .
The biggest problem is there are NO seals on the shafts . Just a snug fit to the base metal .
The drain plug has the right thread count but is not tapered . A pipe plug may work . I would want to tap it first . The fuel inlet was also in issue but could be used with a little help .
The needle has a rubber ? tip and a spring loaded ball on the float end .
The ports to let fuel enter the main jet look very restrictive compared to the MS carbs . They are one drilled hole on each side , 2 total .
I would say they are good parts donors . They would probably be OK for a few years IF you overhauled them first , but nobody wants to buy a new carb just to rebuild it first .