Lawnmower engine question

[DoorNo3]

To make a long story short, I took my old snapper with a 10HP tecumseh TVM220 engine in for a rear-end replacement. While it was being repaired, the guy told me that the fuel lines and linkage cable needed replaced. When I brought the mower home, and started the engine, I decreased the throttle lever (next to the seat) and the engine hung wide open. Below is a picture of the part (throttle?) that was pulled all of the way out.

Pic1

I manually had to push it back in to back the engine back down to idle. This will happen each time that I decreased the throttle. I'm confused why this would happen when decreasing the throttle as opposed to increasing it, unless the repairman didn't connect something the correct way.

I then noticed that fuel appears to be dripping from the following part. I noticed that there is what appears to be an adjustment screw there. Do I just need to tighten it up to prevent the dripping? What is this part?

Pic2

Pardon my ignorance, but I know very little about engines and would like to at least have an idea what is wrong when I take it back to the guy to have him fix the engine.

Thanks for your help.

Here's another picture, just in case it helps clarify the problem

Pic3

 

[Zenmervolt]

The throttle linkage is binding. Something's not hooked up right. When increasing the throttle, the linkage pulls a lever on the carb, when decreasing throttle, it pushes. Since a cable isn't as good at transferring a "push" as opposed to a "pull", it's more likely to have issues decreasing the throttle when things start to get gummed up. Sounds like an error in the cable repair.

The fuel drip is coming off the carburetor float bowl. The screw is an adjustment screw and you can't just tighten it without throwing off the carb adjustment. If it's truly dripping from there, then you need to have the carb rebuilt (really just fresh gaskets), but more likely it's leaking from somewhere else and just flowing down there to drip off the lowest point.

ZV

 

[alkemyst]

i'd take it back and have him fix what he didn't put back together right.