I replaced the carburetor on my Mercruiser 5.7L 350 engine solely because the throttle linkage was getting still and it stuck a few times. It ran fine, just a bit sticky. In hindsight that was a pretty trivial thing to complain about. So I purchased this new, re-built, beautiful Rochester Quadrajet. Everything matched up and it was an easy install even for me. Started it up and the engine has never ran worse. I have a couple other posts here trying to find help figuring out what could be wrong. I got help from several of you and check if ports were misaligned, I had the right base gasket, air leaks etc. but nothing I did made a difference. Results I got from a compression test convinced me the motor was shot and before I started prepping for removal this afternoon, I found a loose valve stem in the compression tester's quick connect. I fixed that and got a completely different set of numbers from a new test but during this test with the coil wire disconnected and all plugs pulled, fuel poured out of the plug holes while I cranked the motor. I kept it in neutral the whole time and never touched the throttle. Both sides of the block was soaked in gas. I'm obviously not a mechanic but I still feel stupid asking if this is normal. If not, what is going on? Is there anything I can do? Sorry for writing a book. I really tried to keep it short.