I HAVE HAD MY 150 H/P MARINER IN TWO DIFFERENT BOAT SHOPS AND THEY BOTH OVER HAULED THE CARBS ,AND CLAIMED THEY CHECKED THE STATOR/TRIGGER/COILS AND OTHER COMPONENTS, THEY ALL CLAIM THE CARBS ARE CORRECT BUT THE BOAT IDLE ROUGH AND WILL NOT RUN BUT 3500 RPMS. I GAVE UP AND STARTED WORKING ON IT...