1999 "EE" Evinrude 70HP 4-Stroke Service Manual, P/N 787023, Page 97Get this manual
1Disconnect battery cables at battery
[] 2Connect 0-40 amp ammeter in series between the white wire rectifierregulator (female) connector and the white wire 30A fuse (male) connector3Reconnect the engine's battery cables[] 4Following the manufacturer's directions, connect the variable load tester (carbon pile) across the battery terminalsStevens Model NoLB-85 and Snap-on Model No MT540D are examples of testers available
11 Excessive
battery discharge rates might overheat battery causing electrolyte gassingThis might create an explosive atmosphere
[] 5Start the engine and run it at various RPMsUse the variable load tester to draw the battery down at rate equivalent to the stator's full output The ammeter should indicate 10 amps at 700 RPM, 16 amps at 1200 RPM, and 13 amps at 5000 RPM]6Decrease the battery load toward zero amps Ammeter should show reduced outputAs the current draw decreases, the battery voltage should stabilize at approximately 14.5 volts If your results vary, check the stator's condition with resistance test before replacing the rectifierregulator