How To Fix A Seized Engine. The engines crankshaft can be turned with the single bolt located in the center of the circular harmonic balancer which is located on the bottom of the front of the engine. If a rebuild is possible youre looking at a cost between 2500-4500.

Since the engines pistons are attached to the crankshaft turning the crankshaft will free the pistons. On the small engines most of us are working on you can bet that if you cant rotate it by hand its probably seized. The first thing to do is remove the spark plug s and try rotating the engine.
While the seized and locked engine.
Oxidation of the internal components of the engine will make the mower impossible to start. The bad news is that it is nearly impossible to free a s eized engine due to a lack of oil. Fill each cylinder with engine oil and wait several days. The first thing to do is remove the spark plug s and try rotating the engine.

