I think I'm missing a nut.

cruiser said

Thanks, Rusty. I'm going to install one so I can turn the engine. What size bolt is this? My other 225 has one but I can't tell what size it is. Has a large hex head on it. Any suggestions? Should I use one from a junkyard, or will a generic off-the-shelf bolt do?

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The one Charlie posted in post #7 will get it did, sir. I added one to Vixen's engine and it does make it nice when I need to turn the engine. Also, since she has lots of compression, it'll zing up there real quick. It surprises me how quick a slant 6 will rev. lol