2003 Polaris Deep Snow Snowmobiles Service Manual, Page 70Get this manual
ENGINES Engine DisassemblyAssemblyFuji 550 Fan Cooled Engines
NOTE: Inspect all parts for wear or damage during disassemblyReplace all seals, O-rings, and gaskets with Genuine Polaris parts during assemblyRefer to pages 3.47-3.56 for general inspection proceduresDisassembly