2G GSX Crank No Start (with Video)

[NvrEndingProjectgsx]

I know, I know, yet another crank no start post but my buddy needs help. Anyway long story short I just created this account for my buddy because he's dealing with a crank no start issue and sent me a video asking what the problem could be and after going over a "possible problems" check list with him, I don't know what else to tell him. The car is a 1999 gsx with a "built" 6 bolt motor. BS deleted, new clutch, flywheel, starter, 255 fuel pump, AFPR, hx35 turbo, Dsmlink v3 with Speed Density, etc.. Anyway he said the car had been running fine, but over the weekend he got home turned it off and a couple of hours later was getting ready to head back out, and it wouldn't start. I had him check spark, fuel, timing and he said they all checked out. I then had him check the CAS and he swapped it out with another one and still nothing. I then asked for a video because I wanted to get a better idea of whats going on and he sent me the video below. Any ideas? Thanks in advance.

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[DSMPT]

This is "no crank no start".
Seems the flywheel ring gear or/and bendix got worn out or have some broken teeth . Or maybe just the starter bolts got loose. Anyways looks like the bendix is not engaging the flywheel ring gear well. So should check that.

 

[DammitCoby]

I'm with DSMPT in saying definitely something to do with the starter. I would also check voltage to battery and starter/ connection to starter. Also if he still has the old starter and it worked try swapping it out since its an easy swap. I've had new starters crap out before if its a cheapy.

 

[asexton6969]

In agreement, swap the starter and visually check the teeth on the flywheel when doing so.

 

[NvrEndingProjectgsx]

Ok thanks guys, sometime this week I'm gonna be taking the starter off my Talon and heading over there with it to swap it on to his car and we'll go from there. He had said it sometimes will start up if he kept trying but when it did it sounded rough and died almost immediately so that's another problem we'll have to deal with, hopefully I can get some video of that and post it.