I have three stuck valves and so want to unstick them. I followed the instructions in the MM Manual until I got to step 4; then there was trouble.
I took the valve cover off. Easy.
I marked which tappets were lifting and which valves were lifting and found that all the tappets were lifting (phew!) and three of the valves were stuck in the up position despite good tappet movement.
After moving the cylinder to TDC and tapping the valve into the down position, I lifted the valve spring and washer and removed the valve keepers. (They are so tiny!)
Then I tried to lift the valve out of the out of its guide.
No dice. I tried prying it from the top, but stopped because I didn't want to scar the head. Then I tried to lever it up from the bottom using a screwdriver inserted between the gaps in the spring.
I don't recommend anyone trying this; the screwdriver slipped off the bottom of the valve and drove my hand into the metal bar the engine is mounted to. Actually, it wasn't my whole hand, just the last section of my pinky finger. I'm not certain if I actually blacked out, but when I regained awareness my hand was in the ice-filled cooler and I was trying to not wet my pants.
Right now the nail is of a shade somewhere between "purple mountains majesty" and the fur of McDonald's Grimace.
(I pause here to remind you I'm a sensitive English teacher fond of British nature poetry and not a mechanic. Yet.)
How do I get the valve out now? Did I miss a step? Is there another component that has to come out before the valve will come free?
How do I know if the valve keepers are good?
How do I know if the tappets are good? I see they are available for sale on the Moyer Marine website, and the perfectionist in me wants to replace all the valves, tappets, valve keepers, but...is it necessary?