I HAVE MANY OTHER PARTS FOR THIS ENGINE THAT ARE NOT LISTED YET. PLEASE MESSAGE ME YOUR NEEDED PART NUMBERS . DK0-33400-1670 KOMATSU alternator PULLEY ONAN 186-0023 NOS NOS Pulley NOS Please look at my other items in my STORE and add me to your favorites list. NOS means new old stock. These are items that are still in new and unused condition that have been on the shelf or in storage for a number of years. Most of my items are in the original factory boxes or cases. Some of these boxes show a good bit of wear and tear from storage time and handling. I try to add to my store listings all the time. Please keep in touch.I am not an expert concerning much of what I sell. ...