Hi,
You'll have to modify the code of the plugin in the file plugins/hikashop/google_products/google_products.php and change the code:
if(!empty($product->product_description)){
if(@$plugin->params['preview']){
$xml .= "\t".'<g:description><![CDATA[ '.strip_tags(preg_replace('#<hr *id="system-readmore" */>.*#is','',$product->product_description)).' ]]></g:description>'."\n";
}else{
$xml .= "\t".'<g:description><![CDATA[ '.strip_tags($product->product_description).' ]]></g:description>'."\n";
}
}
to the code:
if(!empty($product->product_description)){
if(@$plugin->params['preview']){
$xml .= "\t".'<g:description><![CDATA[ '.substr(strip_tags(preg_replace('#<hr *id="system-readmore" */>.*#is','',$product->product_description)),0,5000).' ]]></g:description>'."\n";
}else{
$xml .= "\t".'<g:description><![CDATA[ '.substr(strip_tags($product->product_description),0,500).' ]]></g:description>'."\n";
}
}