Mercruiser 5.7L Idle Issue
Drove boat to a cove and floated for an hour. When I started it, it started right up and sputtered and stalled when I accelerated. After being towed home, I changed the IAC filter and the boat started and ran fine for several cycles. Then it happened again. It started and ran fine. We floated on the lake and died when we accelerated. It starts but stalls after a few seconds. I changed the IAC valve and it started and ran great until we turned it off and restarted. Same thing. It seems to run and idle fine until we accelerate or rev engine. I am back where I started. Any suggestions of what to try next?