Outboard Motor Flushing Bag Model MB-1 for large outboard engines. Flush on land or in the water. Made in the USA Flush your outboard engine fast, easy and efficiently Run in gear and roll it up and take it with you.. Can't fall off and saves water! Leave the prop on while you flush. Stablizing legs for use on land and strap for use in water. For 2-cycle engines to 100 Hp & 4-cycle engines to 80 Hp