Re: Why are these plugs so clean?
More likely the exhaust plate gasket is leaking cooling water into the exhaust near the lower two exhaust ports, allowing the water to be sucked back into the cyl's as the piston comes down.
Be very careful removing the exhaust covers, those old bolts can have a nasty habit of seizing and breaking off. A small ball peen hammer and give each bolt a dozen light love taps before even attempting to turn the bolt sometimes helps break loose the threads. Careful with the hammer, you do not want to hit it off center or even hard enough to deform the bolt head, you just want to shock the bolt threads to help crack loose the corrosion that locks the threads to the motor block.
