24*- nice set up, If they are running well let em' rip. I had one that ran awsome 5500 rpm all day long, and one that would lean out and blow up when pushed hard. I loved the look and the fuel efficiency of them and I may even go back to them with a modern ECU (true MPI) not batch fire like they are stock. The injection parts are not a Mercury specific item. heres a little secret....injectors are from Porsche 928. I have a guy here in CT that ran all the part #'s and can get anything you need. The TPS is no longer available so we are working on some sort of spacer/adaptor to mount on the end of the throttle shaft. Let me know if I can help you out, I have a bunch of info I've collected over the past 5 years.