I'm assuming there is fuel in the clear bowl.
Crack open one of the fuel pipes above an injector.
Spin the engine. If fuel comes out, Repeat for all injectors. It will probably start before you get to number four.
If no fuel comes out your pump may be bust.
The Mazda mechanical pump is not the most reliable. But as this is a non standard fitment you could have anything in there.
Make sure your battery is tip top and have a good supply of rags or towels to mop up.
At least the weather is ok just now.
Good luck.