Had an overhead situation with a 2000 model gas Mercruiser Mag 350 inboard with a Borg Warner Tansmission. The engine alarm went off and the transmission appeared hot. Was almost back to the dock when the alarm sounded, cut the engine and docked on the port engine. Boat was running for over 7 hours off shore prior to the alarm. Water flow was good, oil pressure and temp on the engine was fine, but the stbd transmission was 20 degrees hotter than the port trans. Mercruiser told me today the alarm goes off at 230 degrees, but the transmission was at 155 with a heat gun reading on the casing after in had been off only 5 minutes. Transmission fluid (Dexron III) was clear and did not smell. Will have the strainer checked and replaced and will have the fluid changed. Mercruiser said if the clutches were slipping the fluid would be dark and have a burnt odor, but did not see either. Suggestions would be most helpful. Thanks in advance for any help.