Steve
This is pretty typical of the Jaeger gauges.
The Tach will usually vary due to temperature changes too. When I
was having problems with my Tach I took it apart and found that the rosin on
the solder joints was flaking off and getting into the workings. I
carefully cleaned all the rosin off the circuit board and very gently blew
all the rosin out of the workings. It worked much better after the
cleaning. There is a potentiometer that you can adjust to bring the RPM
reading closer to real. There is also a circuit board that can be added to
eliminate most of these problems.
http://www.stoa-tigerclub.com/tech/stoa_tech_9904.pdf
http://members.shaw.ca/tsmit/tachmod/tachmod.html
http://members.shaw.ca/tsmit/tachmod/tachmod0.html
The speedometer can also get dirty inside and need cleaning but
there are other problems that can cause it to read low. If it always reads
low, you can recalibrate it by moving the needle up. One of the best
article I have found about speedometers is by Anthony Rhodes. Read this
article before you do anything.
http://www.tigersunited.com/techtips/Rhoades-Speedo/rt-Rhoades-Speedo1.asp
Ron Fraser
-----Original Message-----
From: tigers-bounces@autox.team.net [mailto:tigers-bounces@autox.team.net]
On Behalf Of sralsten@ca.rr.com
Sent: Monday, December 22, 2008 11:06 AM
To: Tigers@autox.team.net
Subject: [Tigers] Gauge accuracy issues
The post on speedo cable got me to thinking about this.
Both my tach and speedo function, but both report wrong. Tach is clearly too
high while speedo is clearly too low. Both are proper Jaeger instruments.
The tach is regularly 1k to 1.5k too high. The speedo will report anywhere
from 45mph to 55 mph when actual speed is in the 65mph area. Interesting
also that the odometer is correct even though the speedo is wrong.
Fixing this is not very high on my priority list but was interested in
suggestions. The odometer being correct would indicate that the speedo cable
is probably correct right ? Is this just a gauge calibration issue ?
Thanks
Steve R
B9473720
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11:23 AM
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