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Does anyone know how I can test the stator? My engine(Yamaha 40 HP ) quit running yesterday. I blew the fuse and the Regulator-Rectifier started smoking. I need to know if the stator is gone also. I have no power to the tilt unless I replace the fuse before it blows.
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When you refer to the stator are you talking about testing the lighting coil that provides electrical power to the rectifier/regulator?
You will disconnect the lighting coil from the rectifier/regulator. Then, with the motor running, measure the AC voltage from the lighting coil. Minimum values are as follows:
9.0 volts during cranking
25.0 volts at 1500 RPM
25.0 volts at 3500 RPM
This is for a 40TLRD. You did not provide the precise model identity. All 40HP two strokes may not be alike. -
Yes it has continuity. My motor is a 4 stroke engine. And yes I meant the engine coil. It is the regulator that was smoking. We took that off and the motor ran w/o blowing the fuse.Comment
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Manual will have ohm reading specs also for the coils.
Voltage readings should be read with peak reading meter or a DVA adapter with a regular meter to compare to minimum specs in manualComment
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Well, now that we know that it is a four stroke F40, what is the model? There are carbureted F40's and fuel injected F40's. Carbureted F40A's and F40B's.
What do you mean by "engine" coil? On an F40 there are ignition coils, a lighting coil, a pulsar coil and a charge coil
The only coil that is directly related to the rectifier/regulator is the lighting coil.
If the rectifier/regulator was smoking, and if it blows the fuse when connected, but does not blow the fuse when disconnected, don't you think the problem is more than likely the rectifier/regulator and not a coil?
Whatever coil it is that you want to check, there are procedures in the applicable service manual for doing so.Comment
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It is fuel injected and the lighting coil is correct. The regulator is my problem now and I ordered a replacement.Comment
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putting your complete model # on the 1st post is the normal way to let others know what motor you are speaking about.
it helps a lot, so others are not guessing
Ohm test and voltage tests will show if lighting coil is OKComment
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