1992-1998 Polaris Personal Watercraft Service Manual PN 9912201, Page 93Get this manual

1992-1998 Polaris Personal Watercraft Service Manual PN 9912201, Page 93

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MAINTENANCETUNE UP Troubleshooting Rich Fuel Mixture
Symptoms: Fouled spark plugs; black sooty exhaust; rough idle, idle unstable; poor fuel economy; rough running ("four cycling"); misses; poor