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Your Yanmar tractor not keeping the battetry charged? Chances are
the regulator is bad. Yanmar uses an extremely reliable "generator"
unit that, unfortunately, uses an unreliable external regulator.
To test the generator you need to use an AC (like a house voltage,
not a car) volt meter. Locate the two wires coming out of the generator
and follow them to a small plug. After disconnecting the plug, hook
the ground wire from the meter to one wire and the posative to the
other (it doesnt matter wich one). With the tractor running at a
medium idle, you should have either 14VAC or 40VAC (+-). If it is
anywhere close your generator is OK. If your generator is broken
you will not get any voltage at all.
Check to be sure that all of the wires look OK from the generator
to the regulator and also to the battery. If all of these are OK,
your voltage regulator has likely burned out. There is no way to
repair these units. You can find
replacement regulators here.
We have a full line of fuel, oil, and air filters in stock,
ready to ship. We have even done all of the cross reference work
for you! Just click on your model and order. Most orders shipped
on same day. Click
Here to see our filters.
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