[ss3011]

Could be too much pressure from the pump feed the regulator . Try reducing it down to 15 psi . Also I have had problems with debris getting caught under the regulating ball inside the regulator , pressure to the carb goes way up . I can usually recover by shutting off the pump while the engine is running then after most of the fuel gets used up in the carb , turn the pump back on , and usually the flow will flush out the debris .