1999 Johnson 115 high voltage

tekorpal

Recruit
Joined
Jul 13, 2013
Messages
1
Hello, 1st post here. I just bought a 1999 Glaston sx170 with a Johnson 115 on it. Everything seems to be working fine, the engine runs great however the tachometer will drop off somtime and will come back on after i throttle up. Also the voltage constantly reads 18 volts. Im not a boat mechanic of any sorts, i can do some automotive stuff. Any help would be appricated. Thanks.
 

sutor623

Rear Admiral
Joined
May 23, 2011
Messages
4,087
Re: 1999 Johnson 115 high voltage

First I'd check the battery while the motor is running with a volt meter. Measure the vdc to make sure our voltage gauge isn't faulty. Normally with a voltage issue and a faulty tach reading, you would have a bad rectifier and regulator assembly.
 
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