seven 202 #1 Posted July 18, 2016 I went through Everything all connections etc. Fired it up and tested voltages with my meter.this by the way is a friend of mines and I'm just trying to help.. anyway I'm only getting 12. 98 volts on a high rpm .I was testing from ground on battery to basically plus on battery is this to low ? are these gen / starters hard to rebuild? Share this post Link to post Share on other sites
953 nut 60,136 #2 Posted July 18, 2016 Read the info. on Starter Generators in this manual, should help. Share this post Link to post Share on other sites
Achto 29,408 #3 Posted July 19, 2016 With the engine running more than half throttle, measure the voltage at the A terminal, it should be 13 to 14.5 volts. If it is 12.5 or less, ground the F terminal, if the voltage goes up to 13 to 14.5, most likely the problem is the regulator. Other possibilities are the wire from the F terminal to the voltage regulator, and the ground on the regulator not being good. If the voltage at the A terminal is 14.5 to 17 volts when you ground the F terminal, the regulator cut-out section is probably not connecting the A terminal to the battery. If the unit is measuring 13 to 14.5 volts at the A [without an external ground applied to the F terminal] terminal, the voltage measured at the battery should be within .1 or.2 volts of the voltage measured at the A terminal, if it is the system is working correctly. 2 Share this post Link to post Share on other sites
seven 202 #4 Posted July 19, 2016 Yep I think I did that too and I'm pretty sure it was measuring 13.5 volts that was from terminal A too gnd. I will go recheck that. Share this post Link to post Share on other sites
seven 202 #5 Posted July 19, 2016 Yep I doubled check its 13.5 volts A terminal too and Share this post Link to post Share on other sites
Achto 29,408 #6 Posted July 19, 2016 OK if you are getting 13.5vdc at term A without grounding term F then it sounds like the the connection between A and the battery is bad. I believe you have a regulator issue not a generator issue. The A to + connection may be getting lost through the regulator. You can try removing the cover on the reg and cleaning the contacts with a small file, sand paper is not recommended. If thing don't improve the contacts may be burnt beyond repair, in that case try a new regulator. psep.biz has an aftermarket one at a good price, much lower than OEM price. 1 Share this post Link to post Share on other sites
Achto 29,408 #7 Posted July 19, 2016 14 hours ago, seven said: Yep I doubled check its 13.5 volts A terminal 16 hours ago, seven said: I'm only getting 12. 98 volts on a high rpm .I was testing from ground on battery to basically plus on battery Seven, other than the .5v difference between the generator and the battery, which seems a little odd the system appears to be working. Before you through parts at it may I ask what the symptoms are, or what are you trying to solve? 1 Share this post Link to post Share on other sites
seven 202 #8 Posted July 19, 2016 I went through the regulator like the specs showed now I'm getting 13.30 volts at the A terminal and when I ground the F terminal I'm getting 13.45 volts I think it charging 2 Share this post Link to post Share on other sites
Achto 29,408 #9 Posted July 19, 2016 I believe you are correct. Let us know if you come along any other issues that you might need help with. We also like to see pictures of any projects or tractors you might have. 1 Share this post Link to post Share on other sites
