Low speed misfire

[Bayoudalabay$68]

I have a 1995 25 hp 2 stroke Mercury that runs rough or misfire at low speeds. Compression is at 90 on all cylinders new spark plugs good fuel delivery. Running perfect at high speed starts second crank every time can anyone help thanks

 

[faztbullet]

Coil or switchbox...check with timing light at problem RPM to see if spark is erratic

 

[Bayoudalabay$68]

Thanks will try that