Engine surges when trimming drive
 

When running at 3/4 to full throttle the engine feels like it looses power when trimming the drive up or down. My boats a baja 204 with a mild 5.7 rpm intake 600 edelbrock carb comp 270hr cam with stainless marine manifolds & risers any ideas would be apreciated thanks.

Remove Pos and Neg Bat cables both ends. Both ends means the one connected to the block and fuse. Clean and make all connections shinny metal

The 90 Fuse on starter post clean it as well along with wires connected to the fuse