Voltage Regulator

   / Voltage Regulator #1  

frank77367

New member
Joined
Mar 21, 2005
Messages
3
Location
East Texas
Tractor
1987 Yanmar YM-220
I have a yanmar YM-220, the charging light is staying on, it has the little 2 wire alt. how can I check to see if the reg. is working , can any of the parts stores like napa check this, if I take it off?
Thanks so much
Frank
 
   / Voltage Regulator #2  
I would think any parts store can check that alternator, and if it's putting out correctly, you'll probably need a regulator. Check that all the ground connections are good first tho........
 
   / Voltage Regulator #3  
Disconnect 2 alternator wires . Connect alternator wires to AC voltmeter. Run tractor at about full throttle. Output should be 20-30 volts AC. Don't run any longer than neccesary as damage may occur. If alternator is putting out sufficient voltage , regulator is probably bad.
 
 
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