Hydro Mark
New member
I have a problem that has stumped the folks on the other forums.
I have a 1968 Merc 1250 125hp inline 6. While changing the water pump, I noticed it didn't have an exhaust tube. I saw it on the parts diagram but it's not in my motor. Members of another forum said I do have an exhaust tube and showed me the diagram for it. Seemed logical so I began my effort to restore the exhaust tube.
So, I purchased a used one and all the gaskets off ebay. When I pulled the exhaust extension plate, I noticed it did not look like the one in the diagram. It did not have an extension for the exhaust tube to slide over. So I went to the boat parts website to look it up and it shows two different part numbers for my motor. The one I have (48712) and the one that's pictured (52932). That leads me to believe that my motor came with and without an exhaust tube. Is this correct? The 52932 cross references to many motors, but mine (48712) is only for the 1250.
The new plastic water tube guide is all bubbled and melted from just one test day.
Everything is apart and I'm stumped as to what to do. Should I just put it back together? Or should I get the extension plate for the tube? Another factor is that there are also two different drive shaft housings for my motor, a 3669 and a 3918. I'm thinking that maybe that changes too?
Thanks,
Mark
I have a 1968 Merc 1250 125hp inline 6. While changing the water pump, I noticed it didn't have an exhaust tube. I saw it on the parts diagram but it's not in my motor. Members of another forum said I do have an exhaust tube and showed me the diagram for it. Seemed logical so I began my effort to restore the exhaust tube.
So, I purchased a used one and all the gaskets off ebay. When I pulled the exhaust extension plate, I noticed it did not look like the one in the diagram. It did not have an extension for the exhaust tube to slide over. So I went to the boat parts website to look it up and it shows two different part numbers for my motor. The one I have (48712) and the one that's pictured (52932). That leads me to believe that my motor came with and without an exhaust tube. Is this correct? The 52932 cross references to many motors, but mine (48712) is only for the 1250.
The new plastic water tube guide is all bubbled and melted from just one test day.
Everything is apart and I'm stumped as to what to do. Should I just put it back together? Or should I get the extension plate for the tube? Another factor is that there are also two different drive shaft housings for my motor, a 3669 and a 3918. I'm thinking that maybe that changes too?
Thanks,
Mark
