So guys after a horrible first day out on the water with the new boat I am now stuck with fixing some issues with the motor . Before I took the boat out that day I replaced the plugs started it up and ran it on numerous occasions the motor didnt have an issue started first go everytime but it seems now it's running horrible and won't idle down low after the trip out we did notice a hole in the cylinder had which has now been replaced with new gaskets and cylinder head cover but the motor still seems to be acting strange dropping cylinders down low but seems to be ok when the rpm is up high I really have no idea what this could be note I didn't replace the fuel in the tank I just filled it up which could be my undoing not knowing how old it was but as I said idled fine when was on the old fuel
Any ideas what this could be ?