roscoe69 Posted September 23, 2006 Share Posted September 23, 2006 Hi Everyone ! I bought 64' B61SX and was told the engine was a 250, it is a Mack engine and is turbo, it does look like a later model engine, has jakes, I can't find a plate or any simple indentification. The block casting # 239 GB5354 and are the only #'s I see. It does run strong and has a 13 sp od Roadranger behind it.Thanks, Ross Quote Link to comment https://www.bigmacktrucks.com/topic/1560-engine-indentification/ Share on other sites More sharing options...
HK Trucking Posted September 23, 2006 Share Posted September 23, 2006 The numbers are stamped in the block, just ahead of the inj. pump, on that curved area right where the timing case cover bolts on, unless it was originally in a cabover truck, then the numbers could be on the rear of the block, just below the head gasket.If it's a 250, the model numbers stamped in that area should be ENDT673C. Quote "If You Can't Shift It Smoothly, You Shouldn't Be Driving It" Link to comment https://www.bigmacktrucks.com/topic/1560-engine-indentification/#findComment-7680 Share on other sites More sharing options...
roscoe69 Posted September 24, 2006 Author Share Posted September 24, 2006 The numbers are stamped in the block, just ahead of the inj. pump, on that curved area right where the timing case cover bolts on, unless it was originally in a cabover truck, then the numbers could be on the rear of the block, just below the head gasket.If it's a 250, the model numbers stamped in that area should be ENDT673C.Thanks Man! I'll check it out! Quote Link to comment https://www.bigmacktrucks.com/topic/1560-engine-indentification/#findComment-7692 Share on other sites More sharing options...
roscoe69 Posted September 24, 2006 Author Share Posted September 24, 2006 Thanks Man! I'll check it out!Hi, It does have ENDT 673 stamped on it, but I can't really tell if there is a "C" on the end. Are there any other determining factors to determine the horsepower or vintage? it looks to have the original gray Mack paint. Thanks, Ross Quote Link to comment https://www.bigmacktrucks.com/topic/1560-engine-indentification/#findComment-7696 Share on other sites More sharing options...
HK Trucking Posted September 24, 2006 Share Posted September 24, 2006 ENDT 673 with no letter after it would be 205 H.P.ENDT673B would be 225 H.P.ENDT673C is 250 H.P. Quote "If You Can't Shift It Smoothly, You Shouldn't Be Driving It" Link to comment https://www.bigmacktrucks.com/topic/1560-engine-indentification/#findComment-7702 Share on other sites More sharing options...
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