Re: need help 4 stroke 200hp surging
I had similar idle problem, but also with running too...turned out to be a bad pencil coil, and one cyl wasnt firing right, was easy to check, just pull off the wire conector to eack coil and see if there is a change in the motor..if not at least you know its not a bad cyl or plug..could be injector may be dirty....put in a can of injector cleaner in your gas, and go out and bounce around some...advice from my mech....good luck