1970 Evinrude 115 ob turns over no spark

[fishingdoug]

model#115083 ser#E07955 and OMC# 21355 from what i have read the OMC is a bad thing can this motor be changed over to points?? if not what can i do to keep this motor running. Thanks Doug

 

[rockyrude]

Re: 1970 Evinrude 115 ob turns over no spark

Those are good strong motors. On my 69 115hp there were two wires that go from the power pack under the flywheel to the sensor. The problem was that they got anchored to the timing arm, and with the movement of the arm the insulation on the wires cracked and shorted to the timing arm, killing the spark. I was able to replace the wires all the way to the sensor.

 

[boobie]

Re: 1970 Evinrude 115 ob turns over no spark

Pretty hard to convert to points. You'll have to get a good manual and start trouble shooting. Once you understand the ignition system it is easy to work on.

 

[nrmi76]

Re: 1970 Evinrude 115 ob turns over no spark

i have a 1967 evinrude 115hp and i am having the same problem with no spark. The boat was givin to me about a year ago i have completely restored the inside now im stumped on the moter any advice would be appriciated

 

[fishingdoug]

Re: 1970 Evinrude 115 ob turns over no spark

thanks i'll check it out since we have replaced everything else, i did find in a old form that if you remove the safety switch wires and mov terminal 7 to terminal 9 it would run...Thanks Doug

Those are good strong motors. On my 69 115hp there were two wires that go from the power pack under the flywheel to the sensor. The problem was that they got anchored to the timing arm, and with the movement of the arm the insulation on the wires cracked and shorted to the timing arm, killing the spark. I was able to replace the wires all the way to the sensor.

 

[boobie]

Re: 1970 Evinrude 115 ob turns over no spark

If you jumped a wire between 7 & 9 you would eliminate the safety switch, battery charging system, "monkey balls" and ect. Then your only dealing with the ignition system itself. Power pack, coil,trigger,dist cap and rotor. You trouble shoot that system with the jumper wire in place.

 

[boobie]

Re: 1970 Evinrude 115 ob turns over no spark

nrmi76, I don't believe they had a 115 hp in 1967. Got model # ??

 

[fishingdoug]

Re: 1970 Evinrude 115 ob turns over no spark

If you jumped a wire between 7 & 9 you would eliminate the safety switch, battery charging system, "monkey balls" and ect. Then your only dealing with the ignition system itself. Power pack, coil,trigger,dist cap and rotor. You trouble shoot that system with the jumper wire in place.

Thanks i'll try that as soon as the rain quits i live up here in Oregon and its spring time rain rain rain , but the chinook are running our fishing season has started so i am trying to get in the water, Doug

 

[fishingdoug]

Re: 1970 Evinrude 115 ob turns over no spark

i guess i should mention, that my boat ran great when i got it, and it slowly got worse meaning harder to start then nothing.spent $500 replacing parts my mech and they could not figure it out. so now its on me. need to find book on it. will help alot too.Doug

 

[bigpoppakdog]

Re: 1970 Evinrude 115 ob turns over no spark

check to see if you have volts with the ign. key on. If so, check the output from the pack, then check the ignition coil.