Sticky tach 90SP36

[williamcharrison]

My tach will frequently jump from around 2000 to 1000 (with no
significant change in real rpm). And will continue to move up and down
following rpm changes until I tap on the class. What causes this and
what are the remedies?

Thanks
Chuck harrison
90 SP36
Akron, Ohio

[one_dusty_hoot]

Trash in the jeweled pivot bearings, or hair spring return,
warped or trash on face plate, intermitently open or shorted
coil winding, logic circuit, solder joint or contacts of the
dip switches, post connection loose.

Fortunately you have isolated it to the meter by tapping on
the glass. Check mfgr for repair shop however repair may not
be able to duplicate problem and not fix.

Tape the connecting wires while you have it out so you can
still use the coach.
Bob Janes, Greenville, SC

--- In WanderlodgeForum@yahoogroups.com, "williamcharrison"
wrote:
>
> My tach will frequently jump from around 2000 to 1000 (with no
> significant change in real rpm). And will continue to move up and
down
> following rpm changes until I tap on the class. What causes this
and
> what are the remedies?
>
> Thanks
> Chuck harrison
> 90 SP36
> Akron, Ohio
>

[Howard O. Truitt]

Chuck Harrison,
I was having a problem with my tach doing the same as yours. Someone on the
forum gave me the address of APT Instruments International Inc., Bloomington,
Mn.. Call Chuck at 952-881-7095. He was reasonable and I had about a 10 day turn
around. Good Luck.
Howard Truitt
Camilla, Ga.
86 PT40

----- Original Message -----
From: williamcharrison
To: WanderlodgeForum@yahoogroups.com
Sent: Wednesday, August 30, 2006 11:14 AM
Subject: [WanderlodgeForum] Sticky tach 90SP36


My tach will frequently jump from around 2000 to 1000 (with no
significant change in real rpm). And will continue to move up and down
following rpm changes until I tap on the class. What causes this and
what are the remedies?

Thanks
Chuck harrison
90 SP36
Akron, Ohio






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[Chuck Wheeler]

Chuck,
I had the same problem. Unless your Tach is different than mine (Teleflex)
it is not designed for repair. With nothing to lose I carefully removed the
front bezel holding the glass by bending the edge where it had been crimped,
removed the nuts on the connectors and took the works our. There was a wire
and connector used to set the correct frequency for the pulse generator and
the solder was broken. Since I wasn't going to change the adjustment I
removed the wire and connector and bridged the correct contacts. It has
worked fine ever since. I already had the dash out, fixing the tach took
about four hours. You can get a replacement at a marine that handles
equipment for diesel yachts.

- Chuck Wheeler -
82 FC 31 SB
Fort Worth, TX


_____

From: WanderlodgeForum@yahoogroups.com
[mailto:WanderlodgeForum@yahoogroups.com] On Behalf Of williamcharrison
Sent: Wednesday, August 30, 2006 9:15 AM
To: WanderlodgeForum@yahoogroups.com
Subject: [WanderlodgeForum] Sticky tach 90SP36



My tach will frequently jump from around 2000 to 1000 (with no
significant change in real rpm). And will continue to move up and down
following rpm changes until I tap on the class. What causes this and
what are the remedies?

Thanks
Chuck harrison
90 SP36
Akron, Ohio






[Non-text portions of this message have been removed]