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| Author |
Message |
    
Devin Duhn
Member
Username: duhn
Post Number: 7
Registered: 05-2008
| | Posted on Wednesday, June 11, 2008 - 10:15 pm: | 
|
I have an 86 Merc. 150 hp blackmax. The tachometer works when the key is turning the engine. As soon as you let go of the key when the motor is running, the tach doesn't work.
Any suggestions? |
Graham Lamb
Senior Member
Username: galamb
Post Number: 3368
Registered: 05-2007
| | Posted on Thursday, June 12, 2008 - 03:25 am: |
|
Recently rewired? or bad wire - sounds like the tach is getting it's power from the keyswitch in the "start" position - so either wired wrong or bad connection.
Normally feed the tach with a hot lead from the key switch in the "on" position.
Are you having the same problem with any other gauges? if not look to see whether the tach is piggy backed from a single hot lead to the other gauges - check for bad connections etc... |
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