That's why you can't find it. Seems back in the days of Lake X testing in Florida, they decided that a 40kv ignition was worth a lot more than temperature controlled cooliong, especially when the engine was working in a salt water (highly corrosive) environment. Course they made some mistakes in that regard also back in the '60's and before when they were running carbon steel shafts in salt water when OMC had sense enough to go with Stainless. They finally discovered the error of their ways on the shafts.....glad I wasn't a marine mechanic back then. Doing an impeller replacement had to be a bear, big grizzly.
