I have a "73 85 HP Evinrude. It will start and idle fine, but when I run the RMS's up, in neutral or in gear, it starts missing. I checked all four wires with a timing light and at idle, the spark is fine on all four. But when the idle goes up, the light seems to only fire Intermittently on all four wires. Any any ideas on what to start checking would be helpful. Thanks.
