See full version: Procedure to test Stator on Mercury
1980-1983 80 & 85 HP
1984-1986 75 HP
1984 & Up 60 HP
1980 & up 50 HP
1986 & up 45 HP
Between Blue and Blue/White stator leads 5700-8000 ohms
Between Red and Red/White stator leads 56-76 ohms
Between blue stator lead and powerhead ground No continuity
Between red stator lead and powerhead ground No continuity here
1987 & up 70-80-90 HP
Between Red and Blue stator leads 3600-4200 ohms
Between blue stator lead and powerhead ground 90-140 ohms more
Testing the stator only requires an ohmmeter, you do not need to remove the flywheel. Disconnect the yellow leads to the rectifier. Disconnect stator leads from switchbox. Engine should be cold, resistance increases with temperature. Specifications are from a manual that only goes up to 1990.
1980-1983 70 HP
Between blue and red stator leads 5400-6200 ohms
Between red stator lead and powerhead ground 125-175 ohms more
1987 & up 100 & 115 HP
Between Blue and Blue/White stator leads 6000-7000 ohms
Between Red and Red/White stator leads 90-140 ohms
While a stator is dying, it can produce a weak spark, causing the engine to miss or run poorly. Symptoms are often worsened as the engine warms up. [links]
What Outboard Compression Test Results Mean. Results vary depending on whether the outboard is a Four-Stroke or a Two-Stroke. Good results for Four-Strokes should be 180-210 PSI, and Two-Strokes should be around 110-130 PSI. more
Environment: Aluminium anodes carry a better environmental footprint than zinc anodes. Aluminium anode alloys do not contain cadmium, which is harmful to the marine population. Cost: Aluminium anodes are less expensive, taking into account the significantly reduced weight requirement compared with zinc. [links]
Zincs should be replaced when about half of the anode has been lost to corrosion. Ideally we want that to occur not more frequently than annually. The longevity of a sacrificial zinc anode is a function of its weight. When a zinc lasts less than a year, you need one with more weight.
For Mercury outboards, transom and gearcase anodes can typically be found in the Gear Housing, Transom Bracket or Power Trim parts diagrams. For Evinrude outboards, transom and gearcase anodes can typically be found in the Gearcase or Exhaust Housing parts diagram (look for Tab Kit).
398-881336A03 Stator $ 559.00
398-878143T05 Stator $ 148.00
398-832075A6 Stator $ 392.00
398-821935A5 Stator $ 356.00
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398-821935A3 Stator $ 346.00
As soon you encounter any bad stator sign, immediately disconnect the engine’s batteries and spark plug wires. Do not start any further inspection or tests before that. more
Check whether the woodruff key is in place or not, and install the flywheel, battery cables again. Make sure you have followed each route correctly. [links]
Bad Stator symptoms may vary based on the engine or motor type and sometimes become hard to figure out.
If needed, replace the stator and for that first, remove the flywheel. Since you have already disconnected all the stator connecting wires, remember every step and route. [links]