Should be up stream of thecarb because you are forcing extra fuel into the carbs to aid in starting. Didnt it come with directions?
i think a primer draws fuel from just past the fuel pump and sqirs it directly into the carb. I will have to look at mine to be sure, its the best thing on my sled. half choke, 1 prime, no more that two pulls. i will check mine.
No directions, just bought a kit from Royal Distributing. I drilled into the side of the carb just where the intake boot stops and pressed the little nozzle in there. Teed into the fuel line right after the tank and took her out last weekend. It started great just like you said. Half choke, prime, two pulls.