Hi Mike, welcome to Outdoorking.
That machine seems to have an ordinary Walbro WA carburetor, so you should not have too many problems sorting this out. The most common reason for a primer system not to fill with fuel after replacing the tubes, is because the tubes have been connected backwards at the carburetor. One is a suction hose, with a weighted intake filter inside the tank. The other is a fuel return line, which just enters the tank but is probably above the level of the fuel. If they are connected the wrong way around, the priming system will suck air from above the fuel, and blow bubbles below the fuel. You might begin by seeing whether bubbles are being generated in the fuel when you operate the priming bulb.
If the hoses are the right way around, and there is no suction air leak in the intake hose, the next question will be whether the primer pump is actually creating suction in the intake hose. If it does not, there will be a fault in the pump. You should be able to check this by putting a finger over the end of the suction hose or suction fitting, pressing and releasing the bulb, and seeing whether your finger is sucked against the hose or fitting. The bulb should not be able to return to its normal full-inflated shape when you do this.
