Bombardier SeaDoo 1999 factory shop manual, Page 63Get this manual

Section 04 ENGINE Subsection 02 (LEAK TEST)
ENGINE LEAKAGE DIAGNOSTIC FLOW CHART
PRESSURIZE ENGINE COOLING SYSTEM YES

IS SYSTEM LEAKING? NO PRESSURIZE ENGINE NO

CHECK TESTING KIT

REPLACE O-RING OF CYLINDER HEAD ANDOR CYLINDER BASE GASKET

IS ENGINE LEAKING? YES CHECK TESTING KIT

RECHECK ENGINE SEALING

CHECK ALL JOINTED SURFACES, SCREWSTUD THREADSMOUNTING FLANGES ETCYES REPLACE GASKET OR O-RING, RE-SEAL LEAKING AREA

ANY LEAK FOUND?

CHECK SMALL OIL LINES OF INJECTION PUMP AIR BUBBLES FOUND OR OIL MOVING TOWARD PUMP?

REPLACE CHECK VALVE(S)LINE(S)

BLOCK LARGE HOSES OF ROTARY VALVE GEAR LUBRICATION SYSTEM NO

IS ENGINE STILL LEAKING?

CHECK TESTING KIT

CHECK CRANKSHAFT OUTER SEAL OF PTO AND MAG SIDES YES

PRESSURIZE ROTARY VALVE GEAR RESERVOIR IN CRANKCASE

ARE SEALS LEAKING? NO PRESSURIZE ROTARY VALVE GEAR RESERVOIR IN CRANKCASE

• ATV
• Jet Ski
• Outboard Motors
• Personal Watercraft
• Snowmobiles
• Stern Drives