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352 Posts
Hello all,
When I purchased a 646 project tractor (S/N 9698903), the engine turned freely but it definately had some water issues from sitting over the years. The valves were stuck and not working properly and the cylinders had light surface rust on them.
I brought it to a trusted small engine mechanic, who then took it to a machine shop to be thouroughly checked out. I haven't heard any results yet, but I have committed to do what is right and have a professional repair/rebuild the motor.
One thing that may or may not be a problem is a missing engine shroud. Obviously, I will need this later for proper cooling/air flow, but it is also the piece that holds the engine ID tag (C20580). How important is this information for the engine builder? I know that the engine is a CCKA, but that is the limit of my knowledge.
After looking at an Onan parts website, it doesn't look like the different versions of this motor have different internal components. Pistons, rings, gasket sets, etc. look like they are the same across the board, so I'm hoping that the missing ID info won't be a problem. I am trying to educate myself a little bit so I can give the mechanic as much info as possible. Any advice or instructions on the subject are appreciated.
When I purchased a 646 project tractor (S/N 9698903), the engine turned freely but it definately had some water issues from sitting over the years. The valves were stuck and not working properly and the cylinders had light surface rust on them.
I brought it to a trusted small engine mechanic, who then took it to a machine shop to be thouroughly checked out. I haven't heard any results yet, but I have committed to do what is right and have a professional repair/rebuild the motor.
One thing that may or may not be a problem is a missing engine shroud. Obviously, I will need this later for proper cooling/air flow, but it is also the piece that holds the engine ID tag (C20580). How important is this information for the engine builder? I know that the engine is a CCKA, but that is the limit of my knowledge.
After looking at an Onan parts website, it doesn't look like the different versions of this motor have different internal components. Pistons, rings, gasket sets, etc. look like they are the same across the board, so I'm hoping that the missing ID info won't be a problem. I am trying to educate myself a little bit so I can give the mechanic as much info as possible. Any advice or instructions on the subject are appreciated.