1. By all means, send photos of the tear down and rebuild. We're interested because there are a LOT of these motors in Commanders.
2. I didn't install, but had the alarm on my 1968 wood 35' Sea Skiff, and I thought it was a worthy addition. Instead of driving along until you hear noises or smell burning rubber, the alarm goes off if temp raises. Equally important, if you lose an engine it's not always apparent instantly, and with an alarm hooked to the oil pressure, there's no doubt as to what happened. Mine was hooked to a bell, which I depressed an "momentary off" switch when starting to avoid hearing the bell. It worked great.
3. Circulating pumps don't generally go bad, but I'd be tempted to take a look as long as you have the motors on a bench, especially with a salt water history.
Those motors are reasonably straight forward to rebuild. It's a beautiful design, and believe it or not, every grandmother, man, woman, and child over the age of 10 in the State of Tennessee, can rebuild one of those blindfolded. Remember, a good part of the population learned to drive by watching NASCAR racing!
Paul
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