I have a Honda engine in my push moser. I can get it to crank on but once on it struggles to stay on. I dmn near took the whole thing apart carb, has tank spark plug etc cleaned it put it back together same thing. If I add a fuel cleaner it runs enough for me to cut the grass but then goes down hill ... Any suggestions I am fried

SOURCE: wont continue to run after prime and start

often the last ounce of gas in the tank has some crud in it. Get a can of carbeurator cleaner spray. Remove the air filter and squirt three short bursts of the cleaner spray into the air port and then start it. Keep giving it short bursts of carb. cleaner until it runs smoothly again.

SOURCE: idol goes up and down

There should be a spring that acts as a governor,kinda stabilizes the idle,mabey stretched or in wrong hole,but shouldnt be if it hasnt been touched. Usually when the pushmowers start acting like that there is crud somewhere in the carb. Take the carb completely apart,hell order a rebuild kit,theyre not that much,but take it completely apart. spray it down real good,take a piece of welding wire and poke through those small holes. Make sure you take an air gun afterwards and give it the once over before installing.

SOURCE: I have a yard machine

Your carbs main jet is blocked. Using the primer supplements the fuel input and keeps the engine from becoming fuel starved.

You need to remove the main jet and run a strand of fine wire through the jet to clear it.