[dswanson79]

Hi I bought and replaced my tachometer thinking it was a bad tach however the new one is not working either. When the power is turned on the needle does move forward just a hair. Any help would be greatly appreciated.

[CharlieB]

Ussually a dead tach is caused by a bad rectifier.

Check battery voltage with engine OFF then again running at 2000 RPM or more while on the water. I don't recommend testing on the hose, most will not supply adequate water flow.

If battery voltage does not rise then remove the rectifier and ohms test each yellow to the red then reverse polarity of your leads and test again. The grey wire is your tach trigger.

You should have continuity in one direction y/r but not the reverse.

Post your results.

[dswanson79]

I took the rectifier / voltage regulator off the motor and when I turned it over it was obvious that it had been fried. I was able to purchase a brand new regulator on ebay for about $70. Just got back from a short trip on the water and the tach works great as well as the charging system. Thanks again for the help!!!