Head removal, 25 horse 1983 Evinrude

[paulinkansas]

Hi. I'm relatively new to this site. Recently I bought my first outboard (used) for a used boat that I also recently bought. It's mainly going to be used for duck hunting. Found the motor on eBay and paid a grand total of $23.00 for it (had to pick it up in person). Spent another $4 on 2 new Champion plugs, $60 for a marine battery, and a few bucks on gas/oil so I'm not really out alot of money yet with this motor.

The motor is electric start only. It turns over when I press the start button, both plugs have a spark, but won't start. I did this in water. I pulled the plugs and they were moist. Compression in top cylinder is 50 psi, bottom cylinder had no compression. Pulled the head cover off. The water passageways had exhaust carbon buildup, the thermostat had a black tar/grease residue all over it. I'm guessing the bottom cylinder is leaking exhaust into the cooling system. I removed the studs holding in the head, but I can't seem to get it to budge. The 2 spark plugs are out. Is there some trick to removing the head?

[AlTn]

if all the head screws are out, that's it...a soft faced or plastic faced hammer might be necessary to dislodge it...or a block of wood and a hammer...marineengine.com, ********** and Shop.Evinrude.com....have diagrams of your motor if you need them

[ONERCBOATER]

i have had to tap them pretty hard on occasion with a raw hide mallet.

sean