eklips99;
After re-reading the posts, you stated the engine was from a friend, if it wasn't from a snowblower you may have an application problem depending on what the engine was used for previously, if there is nothing to act as a counterweight(mower blade,etc) attached to the crankshaft the flywheel is normally made of iron, if there is an attachment it is made of aluminum or zinc, so if you have the wrong application it will act as if the key is sheared. Have a good one. Geo