Yamaha 90 With No Spark

[bruboni]

I have recently inherited a Yamaha 90 C90TLRX that has been sitting unused for about 2 years. The starter turns when I turn the key but no spark is going to the plugs. Are there a few things I can check or parts that could have gone bad to replace or repair that may cause this to happen? I am a greenie and would appreciate your input.

Bruce B.
6H1 L354412

 

[Marc III]

Re: Yamaha 90 With No Spark

If the spark is missing on all three. I'd suspect a bad killswitch or missing landyard.

 

[Marc III]

Re: Yamaha 90 With No Spark

I assumed it was a 3 cylinder before I looked up the year model (1999). Those fangled late models have the killswitches under the seat don't they?

 

[bruboni]

Re: Yamaha 90 With No Spark

Thanks Marc,

I believe the kill switch is by the seat. I will check these things later today.

Bruce B.

 

[JUSTINTIME]

Re: Yamaha 90 With No Spark

find the white wire from the cdi box and unplug it
did u get spark?

 

[bruboni]

Re: Yamaha 90 With No Spark

I will do that tomorrow afternoon and let you know. Thanks for your input.

To Marc - The kill switch and lanyard are working and intact.

Bruce B.

 

[bruboni]

Re: Yamaha 90 With No Spark

Justintime,

I unpluged a white wire coming from the box and there was still no spark and a connection with a pair of white wires with the same outcome. I took the time to clean all wiring connections to ensure good contact.

Bruce B.

 

[JUSTINTIME]

Re: Yamaha 90 With No Spark

good deal
now u will need to test voltage output of the stator and triggers
u need a dva and volt meter, or u can use ohms but that is not the best test, because i have tested things that it ohmed right but the volts were not in specs

 

[Ray Neudecker]

Re: Yamaha 90 With No Spark

Be sure the battery is good. If it doesn't spin the motor fast enough it will not fire.

 

[JUSTINTIME]

Re: Yamaha 90 With No Spark

Be sure the battery is good. If it doesn't spin the motor fast enough it will not fire.

good thinking ray

 

[bruboni]

Re: Yamaha 90 With No Spark

I will get ahold of the tools to check the voltage output of the stator and triggers and make sure the battery is fully charged. I am in the process of moving and it may be a couple of days before I can get it done.

Bruce B.