View 2 Photos View 0 Videos Onan DN4M-1 Engine - 40 HP Newly Listed $1,500 USD Used takeout Onan DN4M-1 Engine Assemby. Sold as is, no warranty or return Good rebuildable core, as-is Quantity4ConditionUsedHorse Power40 HPStock Number1066871 MLS Number14601455CategoryEngines Last Updated9/12/2026 LocationFitchburg, MA, US Sold ByRydemore Heavy Duty Truck Parts (888) 519-___ SHOWNUMBERCall Seller Email Seller Save More Info