I have a 1995 Cobia with a Yamaha stern drive. I am having trouble with the shifter sequencing with the carburetor. I have found that there is a common problem with the shifter located in the upper gear housing. I have removed what appears to be all of the bolts from the studs attached to the transom mount, but I cannot get the upper gear housing to even start to separate from the transom mount on the starboard side. I can only find three nuts attached to studs from the transom mount on either side of the upper gear housing. Does anyone know of additional fasteners that may be holding me up, or is it possible that the upper gear housing is seized onto the stud(s)? I can get some very small separation on the port side.