a problem evinrude

[thunderxky]

a 1973 70hp evinrude, model no: 70673d. all 3 plugs stay wet and oily looking. could someone give me some probable causes for this to happen. thanks johnny

 

[walleye052974]

Re: a problem evinrude

you might try checking continuity of your plugs and wires with an ohmmeter. they should have almost zero resistance. also check your float levels and make sure your needle and seat are clean. i bet it is the wires or plugs. you might also make sure you are jetted for the altitude that you are running at. good luck

 

[Joe Reeves]

Re: a problem evinrude

Thunderxky..... The model number of 70673 is a 1976 70hp Evinrude, not a 1973. You should be using Champion plugs QL77JC4 with the gap set to .040 .<br /><br />Look into the following.<br /><br />(Compression & Spark Test)<br /> <br />1st - Regardless of what problem one might encounter, always start with the basic troubleshooting procedure. Check the compression which should be in the range of 100+ psi (somewhat less on the smaller hp engines) and even on all cylinders.<br /> <br />2nd - With the spark plugs removed, rig up some type of spark tester whereas you can set a gap to be jumped. On magneto ignition systems.... and also the Battery Capacitance Ignition system OMC engines from 1968 to 1972, set the gap to 1/4". On the solid state OMC ignition systems from 1973 to the present, set the gap to 7/16". The spark should jump the gap with a strong blue lightning like flame. Let us know what you find.