The primer ball will not fill with fuel. - Echo Zama Carb Kit For Shc210 For Rbk66b Rbk70 Carb

Primer circuit inside the carb, is stopped up....do not rupture the primer bulb, trying to force fuel through a blocked orifice in the carb.......Yes, it has to be taken apart to clean.....

Prime the primer ball.

Number of reasons for the primer not filling, But i'll go with this one as you say the tank is under pressure.

Faulty primer. The primer has a couple of one way valves in it, so it sucks up the fuel while expelling the air in the line. Id say that the valve in the primer has failed and instead of pumping up the fuel you're pumping air into the tank. The replacing the primer. part number 545 00 80-30

Sounds like the check valve in the primer base is stuck/clogged/damaged, assuming the fuel lines and fuel filter are intact and not clogged, It will have to be replaced.

Short line on primer bulb goes to the left side of the carb. The long side on the primer bulb goes to in the fuel tank as the return line.

try switching the tubes on the back of the primer bulb

theoretically the primer ball is the t connector.

Not sure about your particular set-up, but there is usually two fuel lines running from the fuel tank. One goes to the carb and the other goes on a fitting on back of the primer bulb. The primer bulb will have a second fitting with a line going to carb. Sounds like either a clogged or leaking fuel line to me. Hope this helps and good luck.

Hi, check the primer rubber too see if there is small leak in it. and replace the gas tubes inner and outer

If this doesn’t work for you please write back. Thanks,