Matthew Craig Posted November 10, 2013 Share Posted November 10, 2013 I am looking at a 91 mack superliner and it has an em6 300. matched up with a 10 speed transmission. can anybody tell me anything about this motor. Quote Link to comment https://www.bigmacktrucks.com/topic/33441-mack-em6-300/ Share on other sites More sharing options...
Lmackattack Posted November 10, 2013 Share Posted November 10, 2013 Are you sure it's a 300? Most 300 had a 5 or 6 speed behind them. 350s had transmission options of 8 or more gears.Regardless they are pretty much bullet proof engines...considered the Chevy 350 of Mack motors. Anyone can work on them and parts are cheap 1 Quote Link to comment https://www.bigmacktrucks.com/topic/33441-mack-em6-300/#findComment-215927 Share on other sites More sharing options...
Matthew Craig Posted November 10, 2013 Author Share Posted November 10, 2013 that's what the dealership is telling me. I haven't made it out there to look at the truck in person yet. they claim only 326000 miles also. im just wanting to know how reliable the motors are. most engines ive been around has been cats but ive always heard how good mack motors were when they were still a mack Quote Link to comment https://www.bigmacktrucks.com/topic/33441-mack-em6-300/#findComment-215985 Share on other sites More sharing options...
David Posted November 10, 2013 Share Posted November 10, 2013 It's one of the best motors ever built. Probably governed at 1800 rpm. You will need to get used to driving it. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/33441-mack-em6-300/#findComment-215988 Share on other sites More sharing options...
j_martell Posted November 11, 2013 Share Posted November 11, 2013 We run an old (89) rd with an e6 350 econodyne and an 8ll that puts my mp7-405m and 8ll to shame...... Quote Lack of planning on your part does not constitute an emergency on my part.... Link to comment https://www.bigmacktrucks.com/topic/33441-mack-em6-300/#findComment-216065 Share on other sites More sharing options...
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