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Low voltage until high RPMs..
I have an older, carbureted mercury (87 - 96--was told when i bought it, it was 96 but NO new parts have been) that is having idle problems. I was told the experts give advice here so this is the deal...
When I start my engine cold, it sounds fine. When she warms up and the RPMs drop, the volt meter shows it drops down to 1-2 volts on pistons #2,4,6 but has 4-5 volts on 1,3,5 as it idles. As I rev the engine in neutral, the voltage increases on 2,4,6 and coils start working. When she is in neutral, her RPMs spike every 15 - 30 seconds when they drop too low. When I put it in gear, it sounds rough until suddenly, you feel all cylinders come on and you feel a jolt from the engine. When I accelerate, it must have all cylinders because she flies just like she did before this problem. I have replaced the throttle trigger new and it still does this. I think my old mechanic replaced one or both power packs before but I am not sure. PLEASE help me solve this problem and get back to seeing you guys back on the water. Thanks and God bless!!!
When I start my engine cold, it sounds fine. When she warms up and the RPMs drop, the volt meter shows it drops down to 1-2 volts on pistons #2,4,6 but has 4-5 volts on 1,3,5 as it idles. As I rev the engine in neutral, the voltage increases on 2,4,6 and coils start working. When she is in neutral, her RPMs spike every 15 - 30 seconds when they drop too low. When I put it in gear, it sounds rough until suddenly, you feel all cylinders come on and you feel a jolt from the engine. When I accelerate, it must have all cylinders because she flies just like she did before this problem. I have replaced the throttle trigger new and it still does this. I think my old mechanic replaced one or both power packs before but I am not sure. PLEASE help me solve this problem and get back to seeing you guys back on the water. Thanks and God bless!!!
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