Mercury Mariner 200, 225 Optimax Outboards Service Manual, 90-855348, Page 65Get this manual

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1998 OFI Troubleshooting Guide (continued) Symptom 6 Engine runs rough above 3000 rpm Cause 6.1 Fouled spark plug See 3.2 Action
7.4 TPS failure If one (1) TPS fails rpm is reduced to 3,000 If b

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