Have an opportunity to buy a '99 mercury 25hp from a buddy. I checked compression on #1 it's at 115psi #2 was at 90psi. My question is it worth the buy? My first thought is head gasket or lower crank shaft seal. He says it runs good and I trust this guy. Says its a little hard to start but when it does it runs fine just doesn't push the boat as fast as it should. He said it will do 22mph on a GPS. Motor is on a 1440 mod v aluminum boat. With a 13 pitch prop. Would like y'all's two cents as well. Any help is greatly appreciated.