Erratic Tach

mikeB · Veteran Member

Erratic Tach

Stanley · Guru

Hello Mike,

Can you please let me know what alternator and regulator are on your engine.

Because the tach and hour meter are both erratic at the same time it does seem to be either a faulty plug at the back of the tach or mabye it was knocked by something. Failing that it may be a faulty tach.

Stanley

mikeB · Veteran Member

Good day Stanley,

My BV-1505 has a 100 amp alternator with a Beta controller.

I will look at the back of the panel when I return to the boat.

MikeB

mikeB · Veteran Member

Stanley,

I checked the back of the tach and could not see anything out of place.

Went out today and the tach was ok for a while and then pegged at full scale.

When I stopped and restarted the engine, the tach was again ok.

Any thoughts??

MikeB

Stanley · Guru

Hello Mike,

I think that you may have a faulty tach. Please phone me at the office or email me with the info.

Regards, Stanley
stan@betamarinenc.com
1 252 249 2473

Sonrisa · Newbie

Hello,

I am having this exact same issue with my beta 28, with the standard alternator (65amp?). The tacho needle pins above max and sits there, the hours display flashes mostly gibberish and is extremely difficult to read. This will happen maybe 1 out of 5 times. I'm curious if you found a solution to this? Was it indeed a faulty tach?

Thanks

Stanley · Guru

I suspect that you also have the VDO Oceanline tach. Here is a reply from the tech guys who build the panels.

Sounds like it could be a bad button on an Oceanline tacho? This is the button that is recessed at the bottom of the back of the tach case.

When calibrating the tacho the needle jumps & display switches of.

With power off try to press the button a few times to see if it frees anything in the switch that may be the cause.

Let me know if this helps, Stanley