Engine Indentification

[roscoe69]

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

[HK Trucking]

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.

[roscoe69]

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!

[roscoe69]

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

[HK Trucking]

ENDT 673 with no letter after it would be 205 H.P.

ENDT673B would be 225 H.P.

ENDT673C is 250 H.P.