I have a Honda snow blower with a G200 side valve engine and the exhaust valve is stuck open. I tried warming the engine and tapping on the side, but had no luck. I was thinking of spraying some penetrating oil under the valve head. I can see it through the spark plug hole, I can see the intake valve opening and closing and the piston going up and down, and can just see the edge of the exhaust valve which doesn't move.
Any quick fixes to this? I am contemplating removing the head or the muffler to try to free this up.