All I remember about it is it was a stand up cabinet, had a pedal at floor level for acceleration, and a steering wheel. I think you were ferrying packages or something, but it was a speed boat. I played it sometime in the Mid 90's, in my dentist's office next to a Street Fighter II: CE cabinet.
 
Any ideas? Thanks.

Probably Knight Boat: The Crime Solving Boat.

HYDRO THUNDAH!!!

No, but seriously, not a clue.

I know the game you're talking about, but i don't remember the name myself.
 
You were on a speedboat that at the start of each 'mission' got a package which you had to deliver, and there were bonus missions where you had to try and jump on ramps and go through hoops for points.

Is it Hydro-Thunder? 
 

That game was awesome.  My Walmart used to have it in its "Fun Center".  Now the "Fun Center" in my Walmart is a piece of shit now.

Whaat? I wish my dentist was awesome enough to have boat racing and Street Fighter. I'd have looooved to go.

" I know the game you're talking about, but i don't remember the name myself.  You were on a speedboat that at the start of each 'mission' got a package which you had to deliver, and there were bonus missions where you had to try and jump on ramps and go through hoops for points. "

The game I (and others) is thinking of is Hydra!