Mercury Mariner 30/40 4-Stroke Outboard Service Manual 1998, Page 303Get this manual

Mercury Mariner 30/40 4-Stroke Outboard Service Manual 1998, Page 303

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Hydraulic System Troubleshooting Flow Chart
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Remove suction seat as sembly and inspect for debris andlor damageDebris andor damage identifiedTrim will not hold reverse thrust
Suction seat assembly appears O.K- Clean and reinstall suction seat assembly