boatbreaker
New member
Hello,
At the end of last season, a marine shop replaced gimbal bearing in our 1986ish OMC Cobra bored out 6 cylinder. It is connected to an OMC Cobra 5.7 liter outdrive. They couldn't reassemble the outdrive back on because the outdrive needed work itself. The upper unit needed new pinion gears, which they couldn't identify. I asked them to leave the outdrive off until I figured out the situation. They told me they would dump antifreeze in the upper hoses so it could winter the cold temperatures this last winter season. Meanwhile, in the winter, I figured out what pinion gears I needed, had a gentleman replace them along with a new water pump that is located on the backside of the upper unit. This spring we took all the necessary steps to replace the outdrive gasket, fill the outdrive with gear oil, stuck the muffs on, and started it up.
It was harder to start than usual of course (being the first time it ran this year). Was a little smokey for about 5 or so mins. About the time the thermostat should be opening up, steam started roaring from the exhaust exit (at the propeller) and the backside of the outdrive (where I think I usually see the coolant water exit). I'm hoping this isn't a sign of a bad headgasket or head. Am I missing something? We ran the motor for about 10-15 mins, but the steam is not letting up. We never noticed water pouring out where it normally pours out during a coolant system purge. Only steam...
At the end of last season, a marine shop replaced gimbal bearing in our 1986ish OMC Cobra bored out 6 cylinder. It is connected to an OMC Cobra 5.7 liter outdrive. They couldn't reassemble the outdrive back on because the outdrive needed work itself. The upper unit needed new pinion gears, which they couldn't identify. I asked them to leave the outdrive off until I figured out the situation. They told me they would dump antifreeze in the upper hoses so it could winter the cold temperatures this last winter season. Meanwhile, in the winter, I figured out what pinion gears I needed, had a gentleman replace them along with a new water pump that is located on the backside of the upper unit. This spring we took all the necessary steps to replace the outdrive gasket, fill the outdrive with gear oil, stuck the muffs on, and started it up.
It was harder to start than usual of course (being the first time it ran this year). Was a little smokey for about 5 or so mins. About the time the thermostat should be opening up, steam started roaring from the exhaust exit (at the propeller) and the backside of the outdrive (where I think I usually see the coolant water exit). I'm hoping this isn't a sign of a bad headgasket or head. Am I missing something? We ran the motor for about 10-15 mins, but the steam is not letting up. We never noticed water pouring out where it normally pours out during a coolant system purge. Only steam...