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76 Johnson 70

S

silkscreeners

Contributing Member
"I have a 76 70 with no spark

"I have a 76 70 with no spark to any of the plugs. Am I looking at a new power pack? This is a new to me motor (growing old). Thanks, Brian"
 
"Remove the spark plugs. Rig u

"Remove the spark plugs. Rig up a spark tester whereas you can set a 7/16" gap for the spark to jump (important!). Diisconnect the large RED electrical plug at the engine, then crank the engine by jumping the starter solenoid (battery term of the solenoid to ther small 3/8" solenoid nut that energizes the solenoid).

If you have spark via the above test, the ignition switch is most likely shorted.

Spark Tester - Home Made
(J. Reeves)

A spark tester can be made with a piece of 1x4 or 1x6, drive a couple nails through it, then bend the pointed ends at a right angle. You can then adjust the gap by simply twisting the nail(s). Solder a spark plug wire to one which you can connect to the spark plug boots, and a ground wire of some kind to the other to connect to the powerhead somewhere.

Using the above, one could easily build a spark tester whereas they could connect 2, 4, 6, or 8 cylinders all at one time. The ground nail being straight up, the others being bent, aimed at the ground nail. A typical 4 cylinder tester follows:


..........X1..........X2

.................X..(grd)

..........X3..........X4


http://stores.ebay.com/Evinrude-Johnson-Outboard-Parts-etc?refid=store"
 
"Thankyou for the come back Jo

"Thankyou for the come back Joe. Speaking of shorted ignition, my motor is a 1976 and the control box is a 1985. Both have the round red plug. Is there a differance in the wiring configuration between these two? Thanks much, Brian"
 
"With the spark plug out, stil

"With the spark plug out, still in the plug wire with the base of the plug grounded, shouldn't you see spark in the gap when cranking the engine? Which is what I did with the round red plug disconected. Thanks, Brian"
 
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