Hello all,
I have a pair of 2006 Tohatsu TLDI MD90B motors on the same boat, which according to the diagnostic functions have done between 150 and 249 hours. I've had the boat nearly 4 years, though it doesn't get a great deal of use. Last year the boat was only used twice.
In the process of diagnosing some poor idling 2 years ago, I noticed a green oil emulsion (the oil is that colour) in parts of the air rail, around the regulator and around the compressed air input port after disconnecting the hose fitting. I wasn't sure if this was some oddity over a long time so I stripped the compressors and air rails and cleaned everything, then reassembled with new gaskets. I ordered compressor piston rings but they arrived too late. The compressor cylinder didn't appear badly scored to me, but I have no experience to go on.
After only about 15 or so hours running last year, I have partly stripped and checked the engines, and I see the oil again, See this video:
https://www.youtube.com/watch?v=1s-ypO6HEr4
Is this normal? Should I be replacing compressor rings and/or cylinder housing?
One point to bear in mind is that I now know I have been using oil that is apparently not DFI rated, as I was unaware (and it seems the previous owner too) of this requirement. Not sure if the viscosity is different and might cause this?
Any guidance would be really appreciated.
Cheers,
-phil
I have a pair of 2006 Tohatsu TLDI MD90B motors on the same boat, which according to the diagnostic functions have done between 150 and 249 hours. I've had the boat nearly 4 years, though it doesn't get a great deal of use. Last year the boat was only used twice.
In the process of diagnosing some poor idling 2 years ago, I noticed a green oil emulsion (the oil is that colour) in parts of the air rail, around the regulator and around the compressed air input port after disconnecting the hose fitting. I wasn't sure if this was some oddity over a long time so I stripped the compressors and air rails and cleaned everything, then reassembled with new gaskets. I ordered compressor piston rings but they arrived too late. The compressor cylinder didn't appear badly scored to me, but I have no experience to go on.
After only about 15 or so hours running last year, I have partly stripped and checked the engines, and I see the oil again, See this video:
https://www.youtube.com/watch?v=1s-ypO6HEr4
Is this normal? Should I be replacing compressor rings and/or cylinder housing?
One point to bear in mind is that I now know I have been using oil that is apparently not DFI rated, as I was unaware (and it seems the previous owner too) of this requirement. Not sure if the viscosity is different and might cause this?
Any guidance would be really appreciated.
Cheers,
-phil