Carefull on the tapping, I just rebuilt a Magnum 91 four stroke. I lost one of the teflon wrist pin end caps and after searching for hours, I made a replacement. When I went to assemble the engine, I couldn't get the wrist pin in. The piston had a setp in the bore for the wristpin and only had one teflon cap. You may want to check the piston to see of both holes are the same size befor trying to tap it out.

Something like a frozen pin is going to take something more than Dawn PD to free up. It effectively has a seal and will not let the stuff penetrate to clean up the problem. My suggestion is to put the piston and pin, Or whole engine if it is still inside in a big jar of Acetone and let it set for a couple days. Make sure you have a lid on it.

In stead of trying to tap the pin out, try a small ezyout or a disposable tap that will catch in the hole in the pin and try to turn it. Once you get it turning, you can get the solevent into where it will do some good and things will work from there.

Don