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You gotta make the effort to get the vent plugs right, or you'll never know what's best.
#1 Rule on boat setup, take it too far and bring it back. That's motor height, vent plugs, prop whatever,...

Somewhere between then (blowout) and now (bogging) is the happy place. Takes a little time to find it, but I usually start yanking plugs until I find blow out and then put the last combination back...

Review your setup.
Nothing like a transducer blocking water flow?
Do you have another plug? Duct tape works to test.
Known good prop? Little bit of tip cup makes a difference.

Or start...

Not much hope.
That hull wants all the bow lift it can get. That four blade won't give it.

25 Tempest with a bomb hub. Start at 3 3/4" and see how it runs.