What was found
FOLLOWING ENGINE OVERHAUL, CARBURETOR WAS RE-INSTALLED TO OIL SUMP USING O-RING SUPPLIED IN KIT NR 627372-A1, PAGE 25 OF GO-300 PARTS MANUAL, FORM X30020. CARBURETOR INSTALLED PER G0-300 PARTS MANUAL, FIGURE 5, WHICH CALLS FOR AN O-RING. NO O-RING GROOVE EXISTED. G0-300 OVERHAUL MANUAL, SECTION 12-11 CALLS OUT GASKET OR O-RING DEPENDING ON PART NUMBER. OIL PUMP INSTALLED. INDUCTION SYSTEM SHOWN IN FIGURE 8.