1988 Yamaha115 not starting; no spark

[robowenh]

My 1988 Yamaha 115 was running recently and had some carb problems but I was cleaning and adjusting as necessary. While driving the boat it started sputtering and then died completely. Once home I found that the main electrical connector in the engine had come apart and 1connecting tooth had broke off. I reconnected it and spliced a wire on either side of the of the connector and the boat started and was running. <br /> A short while after, the boat died and would not restart. The starter was engaging, but there was no spark from the plugs. The kill swith is continous and discontinuous as its supose to. I wasn't sure about the main ignition switch so I bypassed it. The motor cranked over but there is still no spark. <br /><br />What is the next steps I should check to find where the electrical flow is stopping, and if anyone knows the complete flow of electric from the battery to the spark plugs, please list? <br />Waiting for your reply's, Thanks

 

[rodbolt]

Re: 1988 Yamaha115 not starting; no spark

hello<br /> there is no real flow from the battery to the plugs. that system is totaly self powered. remove the CDI box cover and remove the white kill swicth wire. retest the spark. if still no spark test the stator for resistance and output. if the output is good then test the trigger wires. if the trigger is good odds are the CDI is bad. they are expensive but good trouble shooting will allow you to fix it once <br /> Good luck and keep posting

 

[BRIAN03]

Re: 1988 Yamaha115 not starting; no spark

Remove the main engine harness and your wiring repair(at the engine). Hook up a spark tester. The engine should have fire with the main harness disconnected. Jump the starter soinoid to make the engine turn over. Small brown wire bottom of the three solnoids on port side. If you have no fire. You probly put power to the kill circuit of the ecu. If you did you punched out the ecu. Ecu failure is not a common failure on a Yamaha.

 

[robowenh]

Re: 1988 Yamaha115 not starting; no spark

First off thanks rod and brian for the responses. Like you said I disconnected the white wire from the CDI unit and tested for spark and got it. From there I hooked back up the electrical system and started the motor. It started and ran. <br />Unfortunately I had another problem though. When I went to turn off the ignition switch nothing happened, the motor kept running. I had no way of shutting off the motor so I had to flood it with the choke. If you know how to fix this problem again I commend you. please help.

 

[STUMMINIA]

Re: 1988 Yamaha115 not starting; no spark

I HAVE THE SAME PROBLEM YOU ARE SAYING CHECK THE TRIGGER WIRE WHAT ARE THEY