hkeiner
Lieutenant Junior Grade
- Joined
- Oct 17, 2006
- Messages
- 1,055
While running my motor on the hose, I see that water and exhaust gases are blowing out near the anodes on the lower unit. My shop manual seems to indicate that it is normal for water to exit at this location (see quote from manual below), however it does not mention that exhaust should also be exiting at this location. I can feel the exhaust blow out when I put my hand near the anode.
I am not sure if this is normal and I am worried, of course, that I might have an internal exhaust leak that needs to be fixed. The bold circle on the attached thumbnail shows the location of the anode area that I am talking about.
Also, can anyone tell me what the other circled item in the thumbnail is for (blowup of item is labeled 1647-9147-C1)? It is located near the area of the anode and I am wondering what it has to do with the water/exhaust flow. It does not seem to have a reference to the parts list, so I can't figure out how to find the name or part number of this item.
I thought I would ask a few questions on this forum before I decide to drop the lower unit to take a closer look inside. Thanks in advance for any information on this.
Quote from Mercury shop manual:
Water exits the engine in 3 locations:
• Excess water from the wall of water exits around
anodes on the gear housing.
• A portion of the water that passes through the
thermostats exits out the tell tail.
• Water exits through two 1/8 in. (3.175 mm) holes
in the lower adaptor plate into the exhaust.
I am not sure if this is normal and I am worried, of course, that I might have an internal exhaust leak that needs to be fixed. The bold circle on the attached thumbnail shows the location of the anode area that I am talking about.
Also, can anyone tell me what the other circled item in the thumbnail is for (blowup of item is labeled 1647-9147-C1)? It is located near the area of the anode and I am wondering what it has to do with the water/exhaust flow. It does not seem to have a reference to the parts list, so I can't figure out how to find the name or part number of this item.
I thought I would ask a few questions on this forum before I decide to drop the lower unit to take a closer look inside. Thanks in advance for any information on this.
Quote from Mercury shop manual:
Water exits the engine in 3 locations:
• Excess water from the wall of water exits around
anodes on the gear housing.
• A portion of the water that passes through the
thermostats exits out the tell tail.
• Water exits through two 1/8 in. (3.175 mm) holes
in the lower adaptor plate into the exhaust.