Review on B Engine Control Mercruiser 805224A1 by Taj Tyagi

Plug connection during reassembly. Essentially, the valve is assembled into a mounting cylinder with two asymmetrical stems, then the assembly is secured with a fixed position pin. This item will work on a 5.7 liter MEFI3 TBI Mercruiser but will require the use of a pigtail to get to the connector location. Complicated to say the least. This plug faces upwards, which can make it vulnerable to moisture. My OEM pointed to the rear. Found an alternative source for a lot more money for the correct IAC. Three stars reflect this issue. Without a working IAC, the engine will not start or idle. The new IAC valves have a metal stem on the poppet, not the OEM plastic that breaks.