Need help advice - Yamaha 130 Beta...

[IWAQLD]

Hi all,

can anyone throw some light on this... I have a Yamaha 130 Beta. and I seem to have an electrical issue with the ignition... symptoms are can start and but no power under load...

Have checked coils and plugs (in fact new)etc... All okay but have discovered that the left bank (V4) when looking at the motor from the back of the boat has no spark at all and the motor is effectivley running on two cylinders (right bank). Any ideas? like is the stator a two sided deal and one is down? Have even changed the CDI and found no difference.

Thanks in advance for anything recieved...

 

[rodbolt]

Re: Need help advice - Yamaha 130 Beta...

the specs on most non-US market motors are usually a bit different but the test procedure is the same.
you will need a DVA meter or a DVM with a DVA adapter. you can then test the staor high and low speed charge coil loaded output,the trigger coil loaded outputs and the CDI loaded output.
by then you have the issue resolved.

 

[IWAQLD]

Re: Need help advice - Yamaha 130 Beta...

Thanks for that, the circuits have been tested and can confirm that the readings seem to be within specs, this is what is driving me crazy, if the stator was down it wouldn't run at all right? or am I missing something?? that's why i'm asking if each bank has it's own stator? what about temp sensor? does is each bank controlled by it's own sensor and I can see that there are two of them? if so how best to test?

 

[rodbolt]

Re: Need help advice - Yamaha 130 Beta...

with no spark on one bank someone hasnt done loaded peak voltage output tests.
otherwise you would be posting something different.
the stator simply supplys voltage to the CDI, normally something on the order of about 150-V peak, the CDI rectifies and stores it in a set of capacitors.
the pulser coils normally generate about 3v peak, the pulsers are charged by the inner magnet on the flywheel hub. when the SCR gets a pulser gate signal it turns on and allows the proper capacitor to discharge to ground thhrough the ign coil primary.
its a very simple setup.
voltage in, voltage out.
odds are high you have lost a pulser. on the older V4 motors each pulser controled a bank.
but you really need to use running,loaded output voltage tests with a peak reading meter.
the resistance tests tend to be useless.

 

[IWAQLD]

Re: Need help advice - Yamaha 130 Beta...

Thanks for that... you have pointed me in the right direction.. on the mother!