Chainsaw Repair

Can any body help with the above or point me in the right direction, yesterday one of the special class kids I work with bought in their one and only saw His dad had said had a fuel line issue, I could see the problem straight away a redneck fix that did not work. The fuel line had broken and a new bit had been squeezed over the top to repair it but it was kinked dead flat'. Is it a difficult job to get into these to replace the line and is it a stihl line or can I use a ready available tygon size. Nothing in this for me I know  finances are real tight in his family so If I can fix it without any charge I would be happy, I have some different size tygon hanging about. Any tips most welcome thanks pete

Check in your hot mail?

Thanks 660 got the email and c4fun thanks for the link looks like  a reasonably quick fix got some tygon and a box of chinese aftermarket filters so looks like I can get it done for nix cheers and thanks guys