Mercury Mariner 30/40 4-Stroke Outboard Service Manual 1998, Page 240Get this manual

Mercury Mariner 30/40 4-Stroke Outboard Service Manual 1998, Page 240

CYLINDER BLOCKCR ANKCA SE
MEASUREMENT TEST
1Tie piece of thread (or other non-conductive material) onto the thermostat2Suspend the thermostat in water3Heat water slowly while observing the thermostat

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