Logo
FULL SITE MENU

Engine wonbt turn over318

B

blueclaw

New member
"OK so I had the boat laid up

"OK so I had the boat laid up for a little over 2 years. I fogged the engine(Marvel Mystery Oil) when I laid her up. Now I can't get it to turn over.One plug was corroded,see post"Corroded plug" and I had trouble getting it out.I pulled all the plug out and put oil in all cyls. The starter won't kick it over. Put a wrench on front of engine and applied some torque,can't move it. Any suggestions.
Thanks Blueclaw"
 
One trick I've heard is to

One trick I've heard is to fill the engine cooling system with hot water or to put an electric heater in the cooling circuit to heat up the block. Might be enough to loosen things up. I'd be careful about engaging the starter if the engine's seized... might bust off a ring gear tooth.
 
"Motor oil might be too thick

"Motor oil might be too thick to penetrate into the interface between the cylinder walls and the rings. Some use diesel fuel, some use Marvel Mystery oil, some use PB Blaster and some use WD40. Your exhaust log might have leaked water into that cylinder after you fogged it."
 
"Steve

I had the same thing

"Steve

I had the same thing happen to my motor during boat restoration. Engine was sitting on the ground wrapped in plastic to protect it from water / moisture. I tryed everything you are doing and unfortunatly had to have the engine rebuilt. It cost me $1600 to have rebuilt from local engine rebuilder.

The old saying "If you don't use it, you will lose it"

Goog luck

Art"
 
"Suck out any remaining oil in

"Suck out any remaining oil in the stuck cylinder and use PB Blaster. If the piston is at the top of the cylinder, due to the slant of the cylinder bank it may be hard to get the PB Blaster to the highest point of the piston to free up the rings there. Having the engine on a pivoting stand helps. Let it soak for a day or two and check to see if it is draining past the rings (a good sign). Add more PB Blaster and work the crank back and forth using a breaker bar on the nut on the front of the engine. If that doesn't work, you could loosen the rocker arms to close the valves on that cylinder then use compressed air fed through the spark plug hole to drive the piston down. CAUTION! I have only read of this technique and cannot vouch for its safety."
 
"Sorry if this is a repost, b

"Sorry if this is a repost, but I think something went wrong. Anyway, Steve, same thing happened to me. What most likely happened is the last time the engine was shut down, water leaked into the cylinders through rotted manifolds and or risers. After sitting for 2yrs, everything rusted together thus seizing up. Most likely that engine is now junk. Even if you can free it up, the rings and cylinder walls will be pitted and shot. I lucked out and found a good used motor and swapped it. I would look to do the same if I were you, At the very least haul it out and tear it down to see if you can rebuild it. good luck"
 
Back
Top