GM V-8 engine won't turn over

[Dave Haupt]

We have a 1972 24 foot Sea Ray weekender with a 350 V-8 and a cobra outdrive. The starter engaged but the belts moved only about a 1/2 inch. We removed the plugs and the same thing happened. WE turned the nut on the fly wheel with a wrench, but it still wouldnt turn over. Is it seized? MY buddies have a 305 from a camero. Would it be possible to use a car engine and hook it up to a old cobra outdrive. Would the car engine move a 25 foot Sea Ray? I told them that they were in La Dee Da Land. That it would't work.<br /><br /> Dave

 

[DJ]

Re: GM V-8 engine won't turn over

It's seized all right.<br /><br />A 305 would be marginal in that boat. Besides, you would have to change a lot of componentry to make it work. Minimum: camshaft, core (freeze) plugs and all the components (marine) from the seized engine.<br /><br />I think I would disassemblke the seized engine and consider rebuilding it.

 

[moderator1]

Re: GM V-8 engine won't turn over

Moving to I/O and Inboard Questions.

 

[Trent]

Re: GM V-8 engine won't turn over

Drop the lower unit to make sure its the engine and not the outdrive that seized. If it then will not turn over. Pour some Marvel Mystery oil in each cylinder and let it sit for a few days. Rock the crankshaft every few days to see if she will break loose.

 

[crazy charlie]

Re: GM V-8 engine won't turn over

Dont put the 305 idea to sleep so fast.I had a 1977 sea Ray 240 witha 228 mercruiser.The 228 is a 305.The boat went great!!!!! surely not a bat out of hell,but it went great!!!!Charlie

 

[anesthes]

Re: GM V-8 engine won't turn over

Depending on what camaro motor, it might work out nicely. An L69 motor (TPI, 86-92) yields 9.5:1 compression and capable of 250hp with stock heads. <br /><br />Change freeze plugs (unless closed cooling) and marine camshaft and your ready to go.<br /><br />-- Joe