Re: Old evinrude 25hp won't budge.
It could be a 1972 model, I think you are missing some of the model number.<br /><br />Try laying the motor down, so that that pitons are faceing up, then pour some penetrating oil down the spark plug holes. I would normally use ATF for this, it really gets in well. Leave it like this for a week, then try and turn the engine by grabing the flywheel and rocking it back and forth. <br /><br />Normally the engine should only be turned clockwise as the waterpump impeller will be damaged by turning anticlockwise, but since the motor has sat for 6 years, the impeller is already beyond servicable use.<br /><br />If this frees up the motor, then you need to remove the lower unit (which has to happen anyway) and replace the impeller.<br /><br />If this doesn't free up the motor, then a rebuild is in line. This isn't as hard as it may seem. With a manual, and us here, you can do it.<br /><br />Then pull the carb off, and clean it out really well, use carb cleaner and compressed air, rebuild it with a new kit (available from you local Evinrude dealer) that has a plastic float.<br /><br />You really need to get a manual.<br /><br />by the way, Welcome Aboard!
