impellor

Hey guys... I need some help. Maybe alot of help depending what everyone thinks....small issue and big issue? I was out on my 98 GTS yesterday trying to diagnose a possible problem. Ski runs great but I only have a slight trickle/weep of water coming out of the cooling system check hole on...

I have a 2009 GTI 155, sucked up a rock, which became lodged in between two blades of the impellor, and actually routed away at the impellor ring. I did take out the rock. Now, of course, no thrust. Is there a shear pin that needs to be replaced? This is my first time owning a PWC, so I am...