Olivetroad Posted November 19, 2010 Share Posted November 19, 2010 Can someone tell me the difference between a DM685S and a DM686S ? They are both supposed to be 300 horsepower. Quote Link to comment https://www.bigmacktrucks.com/topic/16558-what-is-difference-between-686-and-685/ Share on other sites More sharing options...
other dog Posted November 19, 2010 Share Posted November 19, 2010 Can someone tell me the difference between a DM685S and a DM686S ? They are both supposed to be 300 horsepower. 1? Quote Producer of poorly photo-chopped pictures since 1999. Link to comment https://www.bigmacktrucks.com/topic/16558-what-is-difference-between-686-and-685/#findComment-67032 Share on other sites More sharing options...
Rob Posted November 19, 2010 Share Posted November 19, 2010 Can someone tell me the difference between a DM685S and a DM686S ? They are both supposed to be 300 horsepower.Not as built originally. The 685 series denoted a 237 Mack engine where the 686 designation called out a 285, (later 300hp) tip turbin charge air cooled engine. This held true through the 1970's.Rob Quote Plodding along with no job nor practical application for my existence, but still trying to fix what's broke. Link to comment https://www.bigmacktrucks.com/topic/16558-what-is-difference-between-686-and-685/#findComment-67033 Share on other sites More sharing options...
other dog Posted November 19, 2010 Share Posted November 19, 2010 Not as built originally. The 685 series denoted a 237 Mack engine where the 686 designation called out a 285, (later 300hp) tip turbin charge air cooled engine. This held true through the 1970's.Roboh...disregard my answer. Quote Producer of poorly photo-chopped pictures since 1999. Link to comment https://www.bigmacktrucks.com/topic/16558-what-is-difference-between-686-and-685/#findComment-67034 Share on other sites More sharing options...
Rob Posted November 19, 2010 Share Posted November 19, 2010 oh...disregard my answer.But I like your answer better. I get so confused by facts, (at least in my mind's eye).Rob Quote Plodding along with no job nor practical application for my existence, but still trying to fix what's broke. Link to comment https://www.bigmacktrucks.com/topic/16558-what-is-difference-between-686-and-685/#findComment-67036 Share on other sites More sharing options...
Olivetroad Posted November 20, 2010 Author Share Posted November 20, 2010 1?Now I know how you got to be a CERTIFIED know it all - as they say on the game shows - Good Answer! Quote Link to comment https://www.bigmacktrucks.com/topic/16558-what-is-difference-between-686-and-685/#findComment-67061 Share on other sites More sharing options...
Olivetroad Posted November 20, 2010 Author Share Posted November 20, 2010 Not as built originally. The 685 series denoted a 237 Mack engine where the 686 designation called out a 285, (later 300hp) tip turbin charge air cooled engine. This held true through the 1970's.RobOkay - Thanks for the info - I am heading to look at them, I will see what they really have under the hoods ---- Quote Link to comment https://www.bigmacktrucks.com/topic/16558-what-is-difference-between-686-and-685/#findComment-67062 Share on other sites More sharing options...
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