VS 2010 - Webservice Needs To Return A Large String

I am building a webservice that reads some HTML source code from a website and sends it back to the client. The service however is failing to send the data because it is too large. I keep getting this error:

The formatter threw an exception while trying to deserialize the message: There was an error while trying to deserialize parameter [URL]..... The InnerException message was 'There was an error deserializing the object of type iRacingForumServiceTest.ForumService.GetForumListResponseBody. The maximum string content length quota (8192) has been exceeded while reading XML data. This quota may be increased by changing the MaxStringContentLength property on the XmlDictionaryReaderQuotas object used when creating the XML reader. Line 153, position 247.'. Please see InnerException for more details.

I have been googling this problem for ages and I cannot figure out how to apply the answers I keep finding.

The problem is simple: the default configuration doesn't allow such large strings. I just don't know how to change this. All I keep finding is things related to WCF, I'm not sure if that applies for me.

What I keep finding is that I need to change the web.config file in various ways. However I cannot figure out where I need to put the config sections. I've tried everything but without a complete web.config file example I can't get it to work

Here is my current web.config of the server:

Code:
<?xml version="1.0"?>
<configuration>
<configSections>
</configSections>
<connectionStrings/>
<system.web>

[Code] ....

I found this piece to add to it:

Code:
<system.serviceModel>
<services>
<service name="ForumService">
<endpoint address=""
binding="basicHttpBinding"

[Code] ....

I figured out where to put it without getting errors (just as a child of the <configuration> element), but it just doesn't work. I get the same error no matter what values I try here... This shouldn't be such a difficult issue, how can I solve it?