strange oil problem with Yanmar engine
Sept 4, 2023 7:42:29 GMT
Post by wolferich on Sept 4, 2023 7:42:29 GMT
I have a weird problem with my Yanmar 4JH5 from 2011, appr. 1000 h, well serviced every year.
Approximately a year ago I found some quantities of greenish liquid below my engine. I couldn't identify any specific leakage and cleaned up everything to trace whatever would follow - but nothing followed. Therefore I assumed that the oil was some remaining stuff after the engine service that had been done by a service company in spring time. For a longer while nothing happened although I carefully controlled the oil situation below the engine.
In this spring time the saildrive seal had been renewed. After the next longer trip I found again bigger quantities of, as it seems, gear oil. Also the level of the gear oil was down. I refilled and made it safely back to the harbour.
Now my service company made a careful check, 3 hours running engine but no obvious leckage exept some small quantities at the oil lid. They changed the seal of the lid and made another 3 hrs trial, half of it se trial, and they didn't find anything anymore.
I don't trust that this is the end of the story. I expect to find oil again after a longer trip. Did anyone experience something like that and is there a specific thing I could look at?
:-(
Approximately a year ago I found some quantities of greenish liquid below my engine. I couldn't identify any specific leakage and cleaned up everything to trace whatever would follow - but nothing followed. Therefore I assumed that the oil was some remaining stuff after the engine service that had been done by a service company in spring time. For a longer while nothing happened although I carefully controlled the oil situation below the engine.
In this spring time the saildrive seal had been renewed. After the next longer trip I found again bigger quantities of, as it seems, gear oil. Also the level of the gear oil was down. I refilled and made it safely back to the harbour.
Now my service company made a careful check, 3 hours running engine but no obvious leckage exept some small quantities at the oil lid. They changed the seal of the lid and made another 3 hrs trial, half of it se trial, and they didn't find anything anymore.
I don't trust that this is the end of the story. I expect to find oil again after a longer trip. Did anyone experience something like that and is there a specific thing I could look at?
:-(
