Years ago I bought a valve spring compressor from Sears made specifically for small engines. It looks like a goofy C clamp with 2 extended fingers on the stationary jaw. Works well.
If you are in a place about saving money or money an issue at this time to buy the tool needed? A valve spring depresser can be made from a pair of large vise grips. That is if you have the extra metal around (as it is a minimal amount of steel) and access to a welder. I use Arc Welder myself.
Last I made like this, was to rebuild my cousin's Chevy Vega. As they were wanting over $200.00 to rent one of their valve spring depressors for his 4 cyclinder. Good luck with your project!
Thanks for replies. I figured it out, a little different from what I was used to, popped it out with a screwdriver. Probably will get the proper tool. I think this is the one...
Well that one is a whole lot different that what I have, but I can see how it would operate.
It also looks easy enough to make with some scrap flat stock for free.
Too be honest, they way I do it normally is just using my fingers. Unless the valve springs are more that 40lb. (which most aren't) my fingers work just fine.