I have a 1986 Four Winns 21
I have a 1986 Four Winns 21' boat with a Merc 165. I recently had the voltage regulator changed and had electronic ingntion installed. Since that time after about 30 minutes of running at a slow speed around 850-1300 rpms the engine starts to act like it wants to stall for a brief moment and then it idles at normal. This cycle is about 15-20 seconds and it continues to repeat. I then took it up on plane at about 3000 rpms and then the engine went from 3000rpms to 2400 rpms and continues to float back and forth. Does anyone have an idea what could be causing the problem. The mechanic at my marina is stumped.
I have a 1986 Four Winns 21' boat with a Merc 165. I recently had the voltage regulator changed and had electronic ingntion installed. Since that time after about 30 minutes of running at a slow speed around 850-1300 rpms the engine starts to act like it wants to stall for a brief moment and then it idles at normal. This cycle is about 15-20 seconds and it continues to repeat. I then took it up on plane at about 3000 rpms and then the engine went from 3000rpms to 2400 rpms and continues to float back and forth. Does anyone have an idea what could be causing the problem. The mechanic at my marina is stumped.