2004 polaris seized up

[old classic]

when starting my 2004 polaris snowmobile 550 motor turned over a couple of times , then seized up. not even able pull motor over with pull cord . somebody suggested putting diesel fuel in cylinders as they claim that motor is gummed up from sitting all summer. supposed to let diesel fuel sit overnight then try to loosen motor up. any ideas on this ? or am I looking at rebuild?
tx
old classic

 

[ESOX]

Not sure about how to solve the 'seizing' problem but if you post it in the snowmobile chat or performance sections, you will likely get the info you need. Welcome to the site and good luck!