I recently purchased a '94 JD 425 with an intermittent smoking problem. The compression tested 170 lbs on both cylinders. I'm in the process of checking out the breather. This requires removing the engine & then removing the flywheel in order to remove the bolts for the breather cover. While I'm waiting for stores to open tomorrow to go buy a 24 mm socket, I thought I'd ask some advice for how to hold the flywheel from turning while removing the nut from the crankshaft. Thanks, Gary