Bombardier SeaDoo 1990 factory shop manual, Page 77Get this manual

Bombardier SeaDoo 1990 factory shop manual, Page 77

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Section 05 FUEL SYSTEM Sub-section 01 (CARBURETORINTAKE SYSTEM)
If bubbles come from needte, replace needle and seat
61,62,63, Diaphragm, GasketCover
Install diaphragm on carburetor