Yamaha SCREW, WITH WASHER - 90159-06M19-00. Reliable Fastening with Built-In Washer Design. The Yamaha - Screw, with washer - 90159-06M19-00 is a genuine OEM component crafted for dependable fastening in Yamaha marine engines and equipment. This precision-machined screw includes an integrated washer, delivering a secure hold while evenly distributing pressure across surfaces to prevent damage.. Engineered for long-lasting use in marine environments, this part combines durability with convenience