Belarus 250as Engine appears seized

[bobtriump]

I have a 1985 Belarus 250as. It has been sitting for over a year and when I went to start it the Engine wouldn't turn over. It was running perfectly fine the last time I used it over a year ago. After pulling out the starter which is good I tried turning the engine over with a 3/4 breaker bar on the front bolt of the crank and a breaker bar on the flywheel, but no good. Next, I removed the injectors and put Marvel mystery oil down into the cylinders along with Kerosine, but again no good. I also have the decompression bar pulled out. Does anyone have any ideas on how to get around this problem. Are there additional things that I could check? Any ideas would be greatly appreciated.

 

[Ed of all trades]

Let it set a few weeks and try it from time to time. If it works it is easier than a rebuild.

 

[jimmysisson]

Agree with Ed. Also I favor the ring gear for trying to turn it, rather than take a chance on twisting off the crank nut. Patience may save you some dough here.
Jim

 

[rdbigfarmboy]

Remove the injectors and fill the cylinders with DOT 4 brake fluid and let it set for a couple weeks or more. then pull it with the injectos out. Pull it and blow all the brake fluid out then reinstall injectors and start it.
DOT 4 is the best to remove rust and carbon. Remember to check and refill the cylinders with brake fluid. It must soak past the rings in order to unstick the motor. Change oil before operating engine.

 

[Ed of all trades]

Remember to be careful, I got my eyes full of gas-oil mix doing the same thing to an old tiller. Guess where my face was when it broke loose.:shocked: It had a lot more pressure than I expected.