Re: Mercury 9.9 seized due to improper storage
Hi John<br /> Sorry, You won't be able to remove the head on your little Merc. They are constructed differntly. What looks like a head is just a water jacket cover. You might, how ever, be able to tap the tops of the pistons with a wooden dowel thru the spark plug hole. Be careful, The piston won't put up with much of this. It is easy to punch a hole in the top of the piston doing this. I would remove the exhaust cover plate, This will expose the exhaust ports and allow you to see inside somewhat. Also remove intake bypass covers, this will let you in the other side. You will also be able to get your solvent in there better. I feel that a strap wrench on the flywheel is better than pounding on pistons. But under these conditions you gotta do what you gotta do. If the motor dose come free test for stuck rings by poking them with an awl thru the ports. They will be springy if OK.