>>>>>>It is later.
Recently I washed of a Legacy 2.2 liter. The water got down inside the spark plugs holes and shorted out the spark. The spark plug hole is up on top of the engine block at a 45 deg angle so the water wil sit in the spark plug recess. ( not like the SVX which is on the end.) The engine did not start and I flooded the engine. I had to pull the plugs and crank the ngine a few times to dry out the gas.
You may have the same problem if you washed the engine on the svx. An electric connection may be wet.
Can you blow it off? Leaf blower? Then let it sit for a day and see if starts.
Washing off the aluminum engine is a good idea if drive on salted roads in the winter.
I have seen a few used Subaru's with a lot of salt corossion as compared to my engines. Just be careful when you wash.
