Reply To: “BRAND NEW” 1986 Mercury 4 HP ?????

[Harmattan1]

Fleetwin, I have a question. I received a part of a replacement carb just over a week ago and I was starting to put the carb parts together this evening. A guy sold me the one half of the carb body that holds the float and it came with the eyelets intact and overall in pretty good condition. I did not notice at first but there is a difference between the half he sent me and my original half. The one he sent me has a circular piece inside of the tube where the butterfly valves sit. This circle has 3 bars that go in towards the center of the circle only to join at another circular element. It looks like a circle within a larger circle. I think this is a set of tubes that allow air and fuel to mix. The problem is the emulsifying tube that fits down inside of the hole where the float sits will not seat far enough into that hole. The emulsifying tube I have is about 2 1/2″ long and extends down into the tube where both butterfly valves sit inside. It extends just over halfway into the larger tube where the butterfly valves sit. The emulsifying tube also is hollow in the center which allows fuel to go through it into the chamber where the butterflies are. Also, there are three small holes just below the threads on the side of the shaft of the emulsifier. These three holes sit below the threads and above a part of the shaft that looks like a seat. It is almost like the size of a washer as far as thickness goes and the 3 holes sit just above that and below the threads. I think the widened part acts like a seat perhaps to seal or seat the brass emulsifier against the tube where the butterflies sit. I don’t know the minute differences between the different carbs are concerned but this one circular piece that is inside of the butterfly tube of the replacement carb prevents my emulsifying tube from going all the way down into the opening it screws into. What would you recommend I do at this point? Is there a modification I can do so that I don’t have to send this part back to the guy I got it from?