Yamaha offers a few selections — with a flush bag, muffs, or hose-port connector and states all 3 procedures work equally effectively. Bag and Muffs: Engine need to be vertical, operate not more than 800-900 rpm in neutral for 15 minutes with the prop removed. Be careful never to cross-thread https://www.linkedin.com/posts/anhometech_anhome-airpod-cleaner-kit-cleaning-tool-3-activity-7180579811667374080-EjnJ?utm_source=share&utm_medium=member_desktop