Mack Doctor Jr.
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Mack 237 Engine
Mack Doctor Jr. replied to morristhecat's topic in Antique and Classic Mack Trucks General Discussion
The 237 motor does not have a tip fan. Also the pump should be different. the difference in the pumps are easy to tell, the 237 pump has a sloped top on the govoner(where the 6 bolts hold the cap on to keep people out of the fuel adjustment). the 300 motors have a flat top on the govoner. thats how u tell whether its a 237 or a 300. joe
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