4.3 Tach Problems

JagGuy

Seaman
Joined
May 31, 2005
Messages
52
Hello

I have a tach that is possessed.

When I turn the ignition on, sometimes it climbs from 0 (if it was at zero to start with) to 1000 or so, without the engine being started.

When the engine is running, who knows what it will read - sometimes it shows what appears to be the right rpm and other times it is obviously wrong - like showing 2000 at a very low idle.

Today I shut the boat off and instead of going to zero, the needle went the other way to stop in the red zone.

Any ideas what I could check?

Also, if a new gauge is ultimately what's needed, how do I get something that's not only compatible as far as the gauge working, but also cosmetically, so it matches the other gauges in the dash (or am I asking too much for it to match?)

Lastly, is the mounting universal (like anything is universal?) as far as fitting in the dash?

Thanks for your help . . . Brian
 

Bondo

Moderator
Staff member
Joined
Apr 17, 2002
Messages
70,957
Re: 4.3 Tach Problems

Hello

I have a tach that is possessed.

When I turn the ignition on, sometimes it climbs from 0 (if it was at zero to start with) to 1000 or so, without the engine being started.

When the engine is running, who knows what it will read - sometimes it shows what appears to be the right rpm and other times it is obviously wrong - like showing 2000 at a very low idle.

Today I shut the boat off and instead of going to zero, the needle went the other way to stop in the red zone.

Any ideas what I could check?

Also, if a new gauge is ultimately what's needed, how do I get something that's not only compatible as far as the gauge working, but also cosmetically, so it matches the other gauges in the dash (or am I asking too much for it to match?)

Lastly, is the mounting universal (like anything is universal?) as far as fitting in the dash?

Thanks for your help . . . Brian

Ayuh,... Try a different Tach,...

Maybe yer motor will quit Dyin'....

I just read yer other thread,... ;)
 

JagGuy

Seaman
Joined
May 31, 2005
Messages
52
Re: 4.3 Tach Problems

Seriously?

Can a bad tach make the engine die?
 

Bondo

Moderator
Staff member
Joined
Apr 17, 2002
Messages
70,957
Re: 4.3 Tach Problems

Seriously?

Can a bad tach make the engine die?

Ayuh,... If it couldn't, I wouldn'ta mentioned it...

A short in the tach, shorts the ignition...
 

JagGuy

Seaman
Joined
May 31, 2005
Messages
52
Re: 4.3 Tach Problems

Can I simply disconnect the tach until I get a new one?

I still have the remaining questions about buying a new one
but at least it wouldn't be a problem and it is certainly of
no use the way it is.

Thanks
 
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