locked up 460 jet boat

charleyk · 05-12-2008, 02:38 PM

I have a 460 BB in my jet boat. I started the boat on the trailer for no longer than 30 seconds, just idle, and shut the motor off. The next day i tried to start it and the motor roatated about 1/2 a revolution and locked up solid.
Thru process of elimination I have determined that it must be a bearing as it is not the jet, dist. heads, or air locked. The starter is out, the plugs are out, the jet is disconnected, the dist is free, the rockers are loose, and the oil is perfect. but the motor will not move either way. not even an 1/8 of an inch. HELP............................ I cant imagine that it would lock up like that after running it on the river 2 weeks ago and it ran great. didnt miss a beat, no noise. Any idea's???????

roberts14_2005 · 05-14-2008, 08:56 AM

well it could be your motor just seized i have had that happen when the vehicle is running great. i would drop the pan and pull the crank and pull out all the pistons. it might have been from a clogged oil galley due to something in your oil. or your oil pump might have quit workin.