2004 Skidoo Tundra Skandic Series Service Manual, Page 113Get this manual
Section 04 ENGINE Subsection 02 (277 ENGINE TYPE)
TROUBLESHOOTING
Before completely disassembling the engine, check airtightnessRefer to LEAK TEST AND ENGINE DIMENSION MEASUREMENTNOTE: The following procedures can be done without removing the engine from chassis
Place clean cloth or rubber pad (PN 529 023 400) over crankcase to prevent circlips no8 from falling into crankcaseThen with pointed tool inserted in piston notch, remove both circlips from piston no5
TOP END REMOVAL (without removing engine from chassis)
Remove the following then lift cylinder head no3 and cylinder no4: belt guard carburetor exhaust system spark plug oil injection inlet fan cowl and hood cable cylinder head nuts no1 and washers no2
A02C29A
CLEANING
Discard all gasketsClean all metal components in non-ferrous metal cleanerScrape off carbon formation from cylinder exhaust port, cylinder head and piston dome using wooden spatulaNOTE: The letters "AUS" (over an arrow on the piston dome) must be visible after cleaningClean the piston ring grooves with groove cleaner tool, or with piece of broken ring