I have a 1997 force 40 hp ELPT. I have been trying to figure out several problems my motor was experiencing, One was a sorta herky jerky feeling while I was cruisng in boat. The other was rough idle. Things I have down so far. Replaced head gasket and shaved head. Replaced foot. A neighbor of mine blew his motor up. Her gave me his old motor. I put the foot on mine, Prop shaft on mine bent and wobbled. All the electrics. Stator , regulator, both coils didn't change trigger since I changed it a few months ago. Also replaced reeds and carburetor gaskets and reed adapter plate gaskets as well as engine adpter gaskets. The engine runs better. The jerkiness seems to be gone. However still idles rough. Also seems to be worse after it warms up. I still see excess moisture on intake manifold like its sucking air. I checked by spraying wd40 around manifold no luck. Also the engine bogs down on takeoff usually a sign of carburetor problem, Carburetor cleaned and all gaskets replaced and float check for proper adjustment. I do have a question? I would like to do a vacuum test however I don't see where I could hook up my tester. Any ideas or suggestions would be appreciated.