New to jet skis and this forum. Just brought home a 2001 gp1200 that hasn't been started in 3-4 months. The engine is seized, plugs are out, no movement in the pistons, just a slight jerking. Have put Pb blaster down the spark plug holes hoping to break the pistons loose. Nothing yet, going to go down and see after I'm done here. Any sugestions to get this engine spinning? Thanks, Eino.