[Alberg30] Tachometer ???

[R.C. Alley]

R: . Try the following:

1. disconnect the Tach wires; it ought to fall to zero.
If it does not, somewhere on the back of the tack is an adjusting screw.
Reconnect, and
1. Adjust the tach to 0.
2. Start engine

If working, it ought to go immediately to about 800 RPM.  If it doesn't, you
have (I would suspect) stray current somewhere in the panel, which is
causing the tach to read high.  Get out your multi meter and track it down.
Start with the grounds, as these are likely to be the problem.

Rob Alley
----- Original Message -----
From: "Randy Katz" <randyk at bertschi.org>
To: "Alberg list" <public-list at alberg30.org>
Sent: Monday, September 09, 2002 7:02 PM
Subject: [Alberg30] Tachometer ???


> Greetings,
>     I have a question about the tach with my 30 MB Universal diesel.  With
> 300+ hours, it just quite working reliably a couple of weeks ago.  On
start
> up it stays at 1000 RPM, where it was before starting.  Reving the engine
> usually does nothing at all, though once when I reved the engine the
needle
> dropped down and started running backwards a qtr turn or so.  Usually it
> does nothing.
>
>     Also usually, after running 15-40 minutes it begins working again.
>
>     Gallery Marine thought checking the wire off the alternator might be
it.
> It seems fine.   The voltmeter reads as usual.  Some "thing" in the tach
> itself?  It sounds like removing it and testing it wouldn't yield new
info.
> New ones cost $115 or so, but this one's practically new.
>
>     Any thoughts?
>
>     Thanks!!
>
> >>>>>>>>>>>>>>>>>>>>>>>>>>>>
> Randy Katz
> Gr. 3
> Bertschi School
> 2227 - 10th Ave E.
> Seattle, WA. 98102
> USA
> 206-324-5476 X301
> www.bertschi.org
> <<<<<<<<<<<<<<<<<<<<<<<<<<<
>
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