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Prop Shaft Slop

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So I'm in the process of replacing my stingers and floor, and was thinking ahead and making a list of things I need to do while it's apart. So anyways, at the end of the prop shaft where it couples to the motor, I can grab the coupler and move it up about a 1/4" and an 1/8" to each side. Down at the prop, I can't seem to move it at all. So is this amount of movement at the coupler normal, or should it be completely tight? It's not like it's flopping around, you have to put in some effort to move it, but thought I'd just check.

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Ok, that's what I'm hoping for, but just want to make sure. So when aligning the engine, do I leave is static where it sits now, or do I block it up an 1/8" in the middle of the play?

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Get the transmission and prop shaft coupler flanges close so you could bolt them together. Then you compress the halves together by hand and check the gap between them with a feeler gage. Then you jack the mounts around until you have less than a 0.005 inch gap. I think the preferred gap is 0.003 inches. Can anyone confirm the numbers? I know I went for less than 0.003 on mine but I'm OCD on that stuff.

Edited by Wayne
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Forgot to mention you check the gap around the full circumference of the flange. When everything is aligned the faces of the flanges should be parallel. In a perfect world there will be no gap all the way around.

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