good afternoon, I am currently having trouble getting my push mower to remain running. It is a 5 horse Quantum engine with a rubber priming bulb. As soon as the fuel is used in the carb. the motor dies. I have the carb off now and all looks fine including the float. There are no blockages in the lines that I can tell. I replaced the filter and even cleaned out the tank. What's up?

 

It may be possible that your fuel tank breather is stopped up. Try taking your gas cap off to see if this might correct the problem.

 

Hello bill!

Verify that you have fuel going to the carb from the tank. If so, you have a carb problem. Check the bolt that holds the bowl on. There may be some tiny holes in it, probably one on either side, and one down the center. Make sure these holes are not clogged. This is the most common cause of your symptom. Otherwise, a there is a restriction elsewhere in the carb. Let us know what you find!

Afterthought: These engines are notorious for breaking the bolt that holds the carburetor mounting plate, and letting the carb fall away from the intake tube. Make sure the carb doesn't wiggle around a lot when it is installed. If so, the bolt is probably broken. It is on the bottom right-hand corner of the bracket, when looking directly at the side of the engine where the carb bolts on.