Yep retaining strap if your worried. Put steel ones in my first motor and headed off to college. Well after a couple of years I left my car with a buddy over Thanksgiving. Took a flight to visited my GF's family. Well when I returned my motor was toast. Didn't know a plug was leaking. Buddy didn't bother reading gauges on a 500 hp engine. Locked up while driving. He let it cool for 30 min according to him and got it fired and drove home. Motor rebuild in college fraternity. Brothers loved it but not really me. NO MORE STEEL!

BTW Marine motors only use brass. Some make 1000+ HP.

Damon