F115TLRB Electrical Tests

[captbilly]

I am measuring 4 areas of my motor and my question is are these AC or DC measurements.
1) Pulsar Coil Output ?
2) Lighting Coil Output ?
3) Rectifier/Regulator Output ?
4) ECM Output ?

also can you explain the differance between Circuit and Loaded.

[boscoe99]

I am measuring 4 areas of my motor and my question is are these AC or DC measurements.
1) Pulsar Coil Output ? AC
2) Lighting Coil Output ? AC
3) Rectifier/Regulator Output ?DC
4) ECM Output ? DC if you are talking about the reference voltage.

Keep in mind that some tests are measuring peak AC voltage but the meter is set on the DC setting even though the voltage being tested is AC.

also can you explain the difference between Circuit and Loaded.

Usually a test is done with a circuit either loaded or unloaded. Unloaded means a device is disconnected. Loaded means that it is connected.

Here is what Yamaha has to say:

“Loaded” means that the component is connected in normal configuration. “Unloaded” means the component is disconnected from other components. If the readings are low when connected, disconnect the component and check again. If the readings are now normal, a short may exist in other components.

[99yam40]

Also you need to be using the test equipment they recommend in the service manual if you are going to compare to the specs given in manual.

If you do not have the peak reading meter made for these ignition systems then use a DVA adapter and your regular meter.
A peak hold meter will not do the job

[rodbolt17]

what is the engines issue?
I am thinking someone is chasing wabbits.

[captbilly]

F115TLRB Electrical tests 2003 w/ 1100Hrs

Usually a test is done with a circuit either loaded or unloaded. Unloaded means a device is disconnected. Loaded means that it is connected.

Here is what Yamaha has to say:

“Loaded” means that the component is connected in normal configuration. “Unloaded” means the component is disconnected from other components. If the readings are low when connected, disconnect the component and check again. If the readings are now normal, a short may exist in other components.

Thank you for your info helped me in diagnosing problem.

[captbilly]

F115TLRB Electrical test

what is the engines issue?
I am thinking someone is chasing wabbits.

Engine issue is:
intermitant engine stalling and running very rough, erratic rpm gauge when engine starts to brake down. It would idle fine then upon heating up woulg start to malfunction, stop and re-start would run fine then shut down as if running out of fuel. I checked fuel pressure and was 42 psi w/ ignition on and 38 psi while running @ all rpm's. Cleaned VST tank filter and there was a minor amount of dirt in it. I did check electrical outputs and noticed the output plug from stator to rectifier showed signs of excess heat and corrosion of the ground connector. Pulse coil output was weak and sporatic. I have replaced the Pulse Coils & Stator Assy as a unit and the results are steady running and a short test drive all my problems seem to be resolved. Thank you