Tach not registering rpms rigt |

This topic has 5 replies, 3 voices, and was last updated 9 years, 4 months ago by Dan Madison.

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- July 18, 2015 at 2:11 pm #31062
  Dan Madison
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  I put a new sending unit in. The tach will only register 1600rpms wide open. Before the old sending unit quit it would register 2500rpms wide open. It shows 400rpms at idle. Tractor is Jinma 200LE. I have tried screwing it in until it touches the flywheel but it doesn't change anything. Any ideas?
  
  Dan
- July 18, 2015 at 6:38 pm #37962
  DavidPrivett
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  well I do not know what engine you have but about 2500 is what they are governed to run at max. These engines run well at 1800 to 2000.
- July 19, 2015 at 1:26 am #37965
  Bob Rooks
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  Screw it in until it touches the flywheel and then back it out 3/4 turn and lock it. If you didn't do that I'm surprised you got any reading at all.
  
  Why did you replace it if the old one was working?
  
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- July 19, 2015 at 1:46 pm #37966
  Dan Madison
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  The old one quit working. That's the way I put it in ,touched the flywheel then backed it off.
  
  Dan
- July 20, 2015 at 12:04 pm #37971
  Bob Rooks
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  Are you certain the new unit is the correct type?
  
  Have you double checked the wiring connections?
  
  I apologize. I misunderstood your post I guess.
  
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- July 20, 2015 at 8:34 pm #37975
  Dan Madison
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  cranked the tractor today tach was working like it was supposed to, reading correctly. guess it just needed a little break in period
  
  Dan
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