Suzuki Repair: Overfilled crankcase, spark plug fouling, crank case


Question
What might be damaged by an over-filled crank case? Evidence-
oil on the garage floor.
This happened at a "quick Lube" to my 1993 Suzuki "Swift"

Answer
Ok, does it still run normally?  If so, the biggest issue has been sidestepped.  That issue is that liquid is not compressible, and could, in an extreme case, bend or break internal parts like pistons, connecting rods, and/or the crankshaft.  The only other issues would be spark plug fouling(it would miss), possible seal leakage(hydraulic pressure from too much oil could damage/displace a seal), and mostly a mess from oil getting all over.  Reset(drain excess) oil level, make sure the air filter isn't soaked, and see where you are at from there.  Feel free to keep asking questions until this is solved.