I have a 89 Mercruiser 3 liter
I have a 89 Mercruiser 3 liter engine with standard ignition system. The coil has broken down twice requiring replacement. Both times it ran fine for a period then will run at low speed and engine very rough at high at high throttle with a lack of power. When a new one is put in it supposedly checks out fine. 10 volts to coil at idle and its within specs at the switch and elsewhere.
Any thoughts on what I should check out after engine running a while at load as it seems fine until its run at high speed for awhile.
I have a 89 Mercruiser 3 liter engine with standard ignition system. The coil has broken down twice requiring replacement. Both times it ran fine for a period then will run at low speed and engine very rough at high at high throttle with a lack of power. When a new one is put in it supposedly checks out fine. 10 volts to coil at idle and its within specs at the switch and elsewhere.
Any thoughts on what I should check out after engine running a while at load as it seems fine until its run at high speed for awhile.