New Aftermarket Idle Air Control Valve (IAC or IACV) Replaces Mercruiser part number: 803149 , 853677 Replaces PCM Pleasure Craft R084003 Replaces Volvo Penta part numbers: 3843750, 3843751, 3857696 FITS MCM/MIE 350 MAG MPI, BLACK SCORPION SKI, 377 SCORPION MCM & SKI, MX 6.2L MPI, 7.4L MPI (L29) & 575 SCi. Fits many Volvo Penta 4.3, 5.0, 5.7 GXI engine Symptoms of a failed IAC can be rough idle, fluctuating idle, engine stalls when coming down from full throttle, hard to start or high rpm on start Idle air control used on many Mercruiser and Volvo Penta engines