1990 Johnson Evinrude 120 thru 140, 185 thru 225, 300 HP, P/N 507875, Page 136Get this manual
Output Tests120, 140, 12SWT, ES
All cranking output tests must be performed with spark plugs installed and torqued in the cylinder headIf necessary to remove the spark plugs, be sure to keep the spark tester away from open spark plug holes
STEPTOTAL OUTPUT TEST
1.jl 1Loosen power pack and disconnect yellowred lead bullet L!J connectorProvide external ground for power pack2Disconnect port temperature switch whiteblack lead and attach power pack whiteblack lead to clean engine ground 3Twist and remove all spark plug leads'2l 4Adjust the gap on the spark tester to 716 in(11 mm)Connect tester leads to the spark plug leadsSecure tester clip to clean engine ground
To prevent possible arcing of high voltage, route tester leads at least in(51 mm) from any metal surface
'" To avoid possible shock hazard, do not handle ignition coils or spark tester during cranking tests