Do any of you Duck Dodgers have a good Mechanic you can refer that works on Atomic 4 engines? I know I'm not the only boat out there that still has one.
Dan M. replied:
Around 170 is normal op temp. Are you saying it's spiking to 220? First easy quick fix is a new thermostat. Real easy to do yourself. If that doesn't do the trick, a vinagar or muriatic acid soak of the block cooling passages isn't too tough to do, and has been known to work wonders for overheating problems. The forums at www.moyermarine.com are a wealth on info on the A4 s.