Fuel pump pressure varies

[thistle3585]

Will a clogged filter or line cause the fuel pressure to climb? I have a pressure gauge after the pump but before the carburetor. I noticed that the pressure gauge showed nine pounds after turning the engine off when it normally runs 5-7. I'm guessing that there is a clog somewhere after the pump because the engine is stumbling. I have a filter before and after the pump. I only have about 30 miles on the pump and I'm hoping I didn't get the wrong one.

 

[Torxhead]

Thats pretty high pressure for a mechanical pump, there might be an issue with something in the carb needle & seat.

 

[Dan77CJ7]

Torx may have found the needle in the hay stack....

 

[thistle3585]

Thanks. That is what I'm thinking. What is the proper jet size for a MC2100 in the midwest for daily driving? I'm not sure how you figure that. Also, is there a certain filter size to use in regards to how small of a particulate matter it catches? Just got home and the gauge was at 10 psi, so I pulled the filter on the front of the carb off and put a new one on. Ran it and it was fine at 6 psi and it had been holding at four since shutting it off.