Running my engines the other day and noticed that my port engine had a white milky foam coming out of the water discharge / exhaust pipe. After about 15 minutes I noticed the engine started to lower in RPMs, needing more fuel. I increased my throttle and engine ran that died of what seemed to be fuel exhaustion. Tried to restart the engine, no joy. I checked the oil.....looked fine, no indications of water mixing with the oil. I let the engine sit, checked fuel filter to see if clogged and even swapped it out with good engine. Restarted engine....same milky discharge and engine died after 10 min...again, what seems to be fuel exhaustion. Ran good engine with swapped fuel filter...ran fine. So, I know it isn't a fuel filter issue. Thinking maybe fuel pump going bad or clogged fuel line? Any suggestions for a 1987 Carver Aft Cabin with Crusader engines?? Thanks!