8 0 1997 Mack EM7 Engine for a Mack MR688S $6,800 USD Good running Mack EM7 engine assembly. TMU. 45 PSI oil pressure. Old style oil cooler. Thermorstat housing broken. Missing fuel line from lift pump to fuel pump. 120 day guarantee. ConditionUsedHorse Power300 HPFits To Make(s)MACKFits To Model(s)MR688SStock Number1047830 MLS Number12928442CategoryEngines Last Updated1/24/2025 LocationFitchburg, MA, US Sold ByRydemore Heavy Duty Truck Parts (888) 519-___ SHOWNUMBERCall Seller Email Seller Save More Info