I am applying 300 or so psi with the vavle spring compressor. They wont release. Are they stuck or something?

Bump the top of the spring retainer with a hard rubber or plastic mallet with some pressure on the spring

A magnet and a screw driver, just pop em off

The locks are tapered with steep angle to keep them locked good on the the valve stem so, you'll need an adapter screwed into the spark plug thread and attach the compressor to keep the valve closed while using an appropriate size socket, rap on the valve lock retainer with a metal hammer to break the tension. After that just push down on the retainer/spring ,using a magnet will pull the locks out. It's also advisable to bring the piston up once the locks released in case the valve stem loose/worn in the guide so the valve wouldn't drop in.

Are you sure you are compressing the spring far enough?

Thanks!! I just hit the facker with a hammer, we're all good now. Looks like the exhaust springs are a little tired, but the intakes are really close to the new springs in mercury boxes I found on ebay. I may have to use these intake springs on my other motor's exhaust valves

Listen here meatball. lol Get back to your other websites, The ones you visit when you are all alone at night

Mild If you were giving me good info. i am sorry. If you were messin with me I am not And you with the red cig. Is that how you do it? Just pry them off w a screwdriver ?

Yup. I always whack all the retainers with a brass hammer before trying to compress the springs.