2009-2010 Suzuki DF70A DF80A DF90A Outboard Service Manual, Page 47Get this manual
Maintenance and Tune-Up: High oil pressure Using an engine oil of too high viscosity Clogged oil passage Clogged oil pressure regulator Combination of above items 7) After testing, reinstall oil pressure switchRefer to "Oil Pressure Switch Removal and Installation" in Section 1E (Page 1E-5) 0B-21
6) Disconnect remote control throttle cable from throttle lever7) Move and hold throttle lever (1) in full-open position
Cylinder Compression Pressure Check
The compression pressure reading of cylinder is good indicator of its internal conditionThe decision to overhaul the power unit is often based on the results of compression testPeriodic maintenance records kept at your dealership should include compression readings for each maintenance service1) Start engine and allow to warm up, then shut engine off2) Disconnect all fuel injector connectors at fuel injector3) Disconnect all ignition coil connectors4) Remove the bolts securing the ignition coil, then remove all ignition coils and spark plugs5) Install compression gauge attachment into spark plug hole, then connect compression gauge attachment to compression gaugeSpecial tool (A): 0991564512 (Compression gauge) (B): 0991569910 (Compression gauge attachment)