chi_town60608
Cadet
- Joined
- Sep 9, 2014
- Messages
- 22
1964 28 HP Johnson model RX-12, Serial # J2455104
I've gotten to the lower unit in my tear down. It's not quite like most I've seen on the internet in that it has 2 parts that must be removed. A bottom section approximately 5 inches tall and then another approx. 5 inch section. I got those apart and removed the lower unit and a wasp nest fell out. It doesn't look to bad from what I can tell, but I do have a couple of questions. These is a copper pipe that couples to a copper pipe in the upper unit that transports the water. Is this normal? It def. looks original, but I wasn't sure if there is an upgrade I should do or any kind of maintenance on the pipe to do. Next question is in regards to the propeller. It looks fine to me, but I thought I would get the opinion of some of you more experienced guys. Also, from the info I've gotten off the web, there is supposed to be some kind of ring at the top of the shaft by the gearing; mine didn't have one. It appears there's a groove for one, but there wasn't one there. Another thing different from what I've read is that there is usually a key that the propeller slides onto. This one didn't have a key, it just has a protruding circular piece of metal that it slides over. Lastly, I was looking up into the motor once the lower unit was off and noticed a mud dauber nest attached to the shaft. I've marked it in one of the pictures. Is there a best way to get this out of there? Or maybe put differently, is there something I SHOULDN'T do to get it out? I figured I'd just take something and knock it off and then blow it out with an air attachment, but I wanted to make sure that's ok. Lastly, if I haven't came to a drop of oil, does that mean this one didn't have any in it? I mean, it could've been sitting for years for all I know, I just wanted to make sure there's no 'magic' compartment full of oil that I haven't gotten to yet. If any of you see something that needs attention that I haven't mentioned, feel free to mention it.
Thanks again!
chi_town
I've gotten to the lower unit in my tear down. It's not quite like most I've seen on the internet in that it has 2 parts that must be removed. A bottom section approximately 5 inches tall and then another approx. 5 inch section. I got those apart and removed the lower unit and a wasp nest fell out. It doesn't look to bad from what I can tell, but I do have a couple of questions. These is a copper pipe that couples to a copper pipe in the upper unit that transports the water. Is this normal? It def. looks original, but I wasn't sure if there is an upgrade I should do or any kind of maintenance on the pipe to do. Next question is in regards to the propeller. It looks fine to me, but I thought I would get the opinion of some of you more experienced guys. Also, from the info I've gotten off the web, there is supposed to be some kind of ring at the top of the shaft by the gearing; mine didn't have one. It appears there's a groove for one, but there wasn't one there. Another thing different from what I've read is that there is usually a key that the propeller slides onto. This one didn't have a key, it just has a protruding circular piece of metal that it slides over. Lastly, I was looking up into the motor once the lower unit was off and noticed a mud dauber nest attached to the shaft. I've marked it in one of the pictures. Is there a best way to get this out of there? Or maybe put differently, is there something I SHOULDN'T do to get it out? I figured I'd just take something and knock it off and then blow it out with an air attachment, but I wanted to make sure that's ok. Lastly, if I haven't came to a drop of oil, does that mean this one didn't have any in it? I mean, it could've been sitting for years for all I know, I just wanted to make sure there's no 'magic' compartment full of oil that I haven't gotten to yet. If any of you see something that needs attention that I haven't mentioned, feel free to mention it.








Thanks again!
chi_town