I have that exact one. I can make ice in mine if sitting inside the house, I have had it down to 28deg. Yours must be bad. Mine will go from 72 to 33 in about 20 mins.
I have a pair of Bravo 1 22p lh and rh props with Mercury racing solid hubs installed in them. Only 1 hour of test time on them. Swapped out to 21p. Brand new run over $800 each plus the hub kit of $150 each new.New was $1900. I will let the complete pair with hubs go for $1400
Hytech, did mine as well. 900. I pulled the engine dropped it off, and picked it up a week later. Have had it in the car for 2 years now, probably 1000 miles on it with no issues. he did a big bore kit on it. Think I paid $3200. He did have to have the window closed in the side of the block...