26GT2 Starting Problem

Description:
-26GT
-Tuned Pipe
-18x6 Prop
-Run approx. 25 times
-Mobil 1 Racing 2T 2cylce oil, 93 Octane, Mixed 32:1
-Engine sits 6 days between runs
-Inline filter

My engine will not start unless I pressurize the fuel system by blowing into the fuel vent. What I noticed is that fuel is being drawn to the carburetor but not into the combustion chamber (Wet thumb but dry spark plug). Its getting worse with time because I only had to do this once before the first start of the day. But now its needing it for every start.
My thought is that the pump diaphragm maybe damaged? I Also, noticed Horizon Hobby does not list a replacement diaphragm?.
My engine is still under Warranty but this would/will be the second time its down for repair. The first time was for a failed ignition module. Man…when this engine is running its awesome but the down time is a disappointing.
All that being said, do you have any ideas or recommendations for me to try?

Thanks in advance,