Sure Mine has developed a tiny leak at the bottom of the case the last days. It would take a couple of days for it to be enough for a drop to hit the floor. Something to worry about, or just let it be until there is need to split the engine?
Yup, seen it there on small frames as well. Check that the case bolts are tight first. If they, something you can do is drain the oil and clean the area with brake cleaner then smear a small amount of silicone like Dirko (my personal favorite and is also grey). Not super thick. Once set overnight fill the oil. Not the cleanest fix but should get the job done as opposed to splitting the cases to replace the gasket.
If the engine has been rebuilt at some point they might have used cheap super thin gaskets. The bargain basement gasket kits are not very good in this regard.
Edit for another thought, is there a flat washer with split washer under those nuts? It doesn't look so when zoomed in. If they are missing then the bolts might be loose. If none of them do you can back the nuts off one at a time and put them there. With the oil drained of course.
Edit again, don't over tighten the case bolts. The nuts and bolts are made out of metal softer than butter and will strip out. I forget the official spec but I recall 9 to 11 ft/lbs, not sure in Newton meters but the info should be easy to find.
Thanks for the replies. I have tried to tighten the bolts, and it helped a bit. Since I don't have a torque wrench that goes that low I didn't want to go to far. I might try to tighten them a bit more. I have no idea if the engine have been rebuilt, but the silicone idea sounds brilliant!
Edit: There is only a flat washer on the screws (thin), no split washer. I guess I have to get some then.
I guess I just can continue to drive it as normal until I get the Dirko and washers then?
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