Hi and Welcome
Do you know what kind of coin mech you have?  5 cent only, 5 & 10 cent or a 10 &15 cent.  The last two will vendor for either amount  base on how the cams are set (explained in the manual see below). I have a  10&15 cent and the coins will drop though if there a coin stuck in the mech. 
Here's a link & a quote from member Larry to some stoner manuals we have on the site, you will have to register to get them.  
The final Stoner candy machine information that I have, has been loaded in the "Downloads" under "Misc manuals" and listed as "Stoner Miscellaneous info."  There is a tag that shows how to adjust the machine for different prices.  More useful information about loading and it also has the patent information.  I find this download more useful than the manual scans.
http://soda-machines.com/index.php?option=com_docman&task=cat_view&gid=94&Itemid=61A link to a post I had on my coin mech
http://soda-machines.com/discussions/index.php/topic,13451.0.htmlAlso try doing a search on  "stoner" and you'll get a long list on posting with good info. 
Ray