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Idel up and down

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"I put a new rotor,cap, elecrt

"I put a new rotor,cap, elecrtric sencer and a coil on my 260 mercruiser and I cant set the timeing because it ideles up then down wont stay even. Its a thunderbolt 4 electric ignition.Thanks"
 
"Ayuh,...

Did it do that Be


"Ayuh,...

Did it do that Before you started the Tune Up,..??

Is the Carb Clean,..??"
 
What happens to the idle when

What happens to the idle when the engine reaches operating temp.? Have you tried to adjust the idle speed? Have you tried to adjust the mixture? What happens to the idle? Choke working?
 
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