I have a moki 1.8 with a cline regulator...........pressurized system

the diaphram was replaced 18 months ago..........5 flights on the replacement

the motor was moth balled, but started right up after sitting all this time

5 minutes into the run the motor shuts down

now it doesn't draw fuel.....except with the carb wide open and my finger over the throat of the carb for priming

could the diaphram have died already????

any help is always appreciated

bob