T&T: Temperature gage Variation

[Jake2124 at aol.com]

I have a John Deere 4 cyl. Turbo in my Trawler. All the engine gages cages 
came with the engine. The temp always reads around 180F. I recently had the 
alternator modified to use an external 3 stage regulator. Since the installation 
of the new regulator, the temp reads about 5 degrees higher while the regulator 
has the alternator in either the bulk or Absorb mode. After the regulator 
goes to float, the temp. drops down. Is it normal for the temp gauge system to 
vary with voltage changes?

Thanks

Brian


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