I assume that you have been through the 'Snagger Motor OPTO Board / Micro Switches Adjustment Procedure' in the manual?

Maybe I missed something in another thread. But can you describe exactly what it is or isnt doing? I just went through an extensive troubleshoot and rebuild of my snagger mech. My drop target was the culprit in my machine. Was never fully descending, so the snagger never moved.

The entire mech is actually moved by the black timing belt on the 2nd pully. When the snagger is laying flat over the playfield. The first section with the ball magnet lifts up. Once it hits resistance, it locks into the slots of the first piece and then starts to lift up the rest. It's quite an ingenious mech.

Has your set screw on that lower toothed pully come loose ? Spinning freely maybe.
Is your timing belt secure?
Has the shaft with just the timing belt loosened its screw on the end? It has to be tight and the shaft seats into a square hole. The screw keeps the shaft seated properly so it cannot spin.

Make sure that black belt is in working condition....I took mine apart and had to replace that belt bc it was stretched all out and had nothing left on it for the teeth on the gears to grab onto.
Make sure you tear that Snagger assembly apart and investigate everything.

You need this.
https://www.marcospecialties.com/pinball-parts/545-5817-03

You should see another pully on each shaft with grooves in it. Timing belt goes over those. This belt is responsible for the movement of the entire assembly

What he said. You haven’t fully pulled the assembly apart yet. This is most likely a mechanical issue....not switches and motors.
Take your time bc the snagger mech has some small parts/C clips holding it all together.

Any teeth missing on this

https://www.pinballlife.com/jurassic-park-lost-world-snagger-timing-chain.html

Go to pages 78/79 in the manual that shows the snagger mech and lists all the parts. Take the snagger mech out of your game (not the motor yet) and remove the covers to expose the parts inside, then take inventory of what's there. Check the gears and belts for missing teeth. Page 81 really lays the mech out with a troubleshooting guide and rebuild instructions. The gears are held onto shafts with flat spots and they need to be tight and aligned correctly to move the mech instead of spinning in place.

Remember to take plenty of pictures as you go so you can get it all back together again.

Any update on this? Inquiring snagger owners would like to know...

Any luck?

My buddy has one that works properly very ,very rarely. It seems like the drop target isn't dropping/staying down when it is supposed to, to let the snagger come down. I'll hopefully get to go look at it within the next few days.

Hey GLSP3022 This comment here! Does that need to be extremely tight in order to move the upper mech that grabs the ball? I have made sure my belt is fully set, no tooth missing, gears turn with motor. All I can think of is a loose screw because it seems like the mech just freely spins. Is there anything else that keeps that upper area in place from just flapping around?
thanks!