boat engine cover plate

BOATERS.......Atomic 4 engine overheating?

I have a 30 ft Tarten sailboat with an Atomic 4 engine and I am having an overheating problem. I changed the impeller and pulled the heads. I have a good flow of water through the engine and changed the thermostate. Any ideas?


These engines are getting very ancient. If it's raw water cooled (and most of them were), the problem is surely corrosion on the internal passages of the engine. Pull the exhaust manifold - you may be able to work an air hose and a wire coat hanger

  • What's hot

    NEW Starter Universal Marine Inboard M35 30hp M430 Atomic Four M430a 4 Cyl Diesel 1987 1988 1999 1990 1991 1992 1993 1994 1995 1996 1997
    Automotive Parts and Accessories (Rareelectrical)


    Rareelectrical


    • One Year Warranty
    • 100% Factory New OE Replacement
    • Complete With New Drive

Atomic 4 engine bench test after rebuild

Beach Testing an Atomic 4 engine, I had just rebuilt. This is the 3rd attempt with the timing correct. With CJ Henderson assisting (on left ...

Catalina 27 Atomic 4 Engine Removal Part 2 of 2

Actual process of moving the motor off the boat.

Universal Atomic Four Engine Block Crack Repaired With JB Weld

After weeks and weeks of thoughts of how I might be able to save this engine block or at least get a wee bit more life out of it I decided to try ...