Re: mercarb overhaul advice
Does your float have the 2 "dots" like in the photo? You have to measure it from the one shown to the carb base, with the gasket in place. Don't forget to use the same reference when checking for both float cutout AND float hang.
If your kit came with a small ruler, MAKE sure you read it correctly. On mine, the measurements were in different increments than the value. The float cutout was 9/16 (with the spring loaded needle) and hang is 1 1/4.
Also make sure you check and see if your carb has the check balls in both the accelerator pump chamber (under a clip and screen) and in the body itself. Depending on what carb you have, you might have both check balls or just one. Also ensure that passage that goes from the accelerator pump to the metering area is clear. Every carb I rebuilt has this passage totally blocked, and it takes some cleaner and compressed air to clear it.