WE have rebuilt the carb and the tiller still runs for a few minutes then runs out of gas. We have put a new bulb primer, and we have new gas lines.

if the primer bulb cannot pick up fuel and the fuel lines are good then you have a bad primer plate and you need a new carb

look for a cracked fuel line or a split in the primer bulb

when the primer buld is empty, when pushed it should push bubbles into the gas tank and when let go should draw fuel from the tank. the primer buld now when pressed pushes fuel into the carb and should not push back to the tank. when let go again it will draw more fuel from the tank. the inlet nipple on the carb should be the 3 oclock

hello sir, my machine will only start when pumping primmer bulb or squirting fluid in the carburetor than stops. the fuel line has broken off, in most small carburetors this is a ongoing problem.old fuel will crystallize when left in tank for a long time.plugging up ports, fuel lines, small screen in carburetor.fuel lines will dissolve clogging carb.this is why it will run when the choke is on creating a vacuum to where there is fuel forced in the carb to rum,also the gas will evaporate leaving the oil behind clogging up carb.the thing to do is remove carb. and clean out,replacing gaskets or fuel line if necessary.use carb cleaner to clean out carb.make sure to make note where fuel line go.the fuel filter broke off of fuel line letting debris get in carb plugging it up.the muffler is known to clog up a lot on these machines where they want run. the compression should be 60 to 120 lbs any thing below 60 is junk. when adjusting the carb screws turn in all the way than turnout 1 1/4 turns turn in slow until machine runs also you need to check for spark by removing plug and grounding against engine to check spark, ok.a new spark plug would be a good ideal too , if you are going to make these repairs use new fuel line and filter,hope this helps,any comments welcome,thank you, !!

Replace fuel filter in tank if you have not already done so. Also clean or replace air filter. Make sure there is no leak in primer bulb ((you should feel resistance after pressing several times before starting). Make sure there are no kinks in the fuel line to the carb (if you detach line from the carb fuel should flow from the tank. Otherwise you may have carb issues.

There are a few things to look at.First and easiest is check the primer bulb and fuel line for any cracks,and the in line fuel filter.Next is a filter on the end of the fuel line,inside the tank.If all of that is ok there is a small screen in the carb. you will have to tear down the carb to get it.

You're the man. You told us. It needed a different primer bulb. Case solved.

Well if the unit has fuel than it should prime unless the primer bulb is damaged and unable to force air/gas through the line. This is definetly a fuel issue, I would remove both the line from the tank to the carb and carb to engine and clean them thoroughly.

When you press the bulb the carb should shoot gas from the unit when disconnected. If this isn't happening your clog is here. If it does eject gasoline than your clog is the clear line which sometimes collects sediment if the gas is poluted.

If you removed the fuel lines from the primer bulb you may have reversed the lines. On two stroke engines the primer pulls gas through the carb it does not push gas into the carb. On the back of the primer bulb there are two hose barbs, one says in (in very small letters) this side goes to the carburetor and the other goes to your gas tank (it is a return line) This line is about a third to a half way up the side of your gas tank, not at the bottom where the fuel line is.

I had the same problem, get a rebuild kit. It sounds like the diaphram is shot. Also make sure the prime bulb doesn't have any holes or cracks, the engine won't run if it does