Excerpt on frontpage

I´ve got a problem with the excerpt code on my wp-theme(magazeen). The code cuts the two first posts. But the rest is fully shown. This is the code in index.php

<?php endif; ?>
							
							<div class="post-intro">
							
								<?php the_excerpt( '' ); ?>
								
							</div><!-- End post-intro -->
							
						</div><!-- End post-content -->
						
						<div class="post-footer clearfix">
						
							<div class="continue-reading">
								<a href="<?php the_permalink() ?>#more-<?php the_ID(); ?>" rel="bookmark" title="Continue Reading <?php the_title_attribute(); ?>">Continue Reading</a>
							</div>

PHP:

would appreciate any help

 

post the the_excerpt function

 

I´m pretty new and still learning php and the folder i got the magazeen-theme I can´t find any the_excerpt function. I´ve opened all the files to search for the term and only shows up in the index.php. Is it that simple? I do not have a code that defines the excerpt function? How can i get one to correct the error.?

ty for the patience of a beginner..