The Yanmar Help site is so erratic I have given up trying to post there, so hope that someone here can advise:
The automatic bilge pump failed recently, and I found a lot of water in the boat. The level reached just to the top of the gearbox, by the slots in the top of the bell housing. No water entered the engine, so after pumping out and after testing cautiously by hand while decompressed, I tried the starter and it fired and ran perfectly. The water clearly had not quite reached the starter motor, and perhaps it is sealed in any case.
I presume the bellhousing must have a drain at the bottom - anyway it was empty of water.
The gearbox oil however has a slight frothy appearance. Is this normal, or does it mean that some water has entered? The dipstick level is normal. Iwondered whether I should drain the oil just in case, but not having a suitable container available I left it till next visit. I haven't run it in gear since the flooding.
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1GM10 safe water level?
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