Tach Sending Unit - 6V92TA

[Glenn Allen]

I am trying to issolate why my tach is not working. I am starting
with the sending unit. After a little help, I have finally found the
sending unit.

The unit looks like a gearbox with an A-Frame clamp holding it to the
engine block. On top of the gearbox is a Hex column about 3-4" long
with an flat-1" dia circular electrical connector on top with two
wires exiting.

Has anyone performed any trouble shooting on this type of sending
unit? Do I remove the A-Frame clamp to check the gear box? Is there
an easy method to check the pulse output short of using a scope?

Thanks,

Glenn Allen
1986 PT-40
Marietta, GA

[Glenn Allen]

I have found installation instructions for this type of sending unit
at :
http://www.tpub.com/content/misc_manuals...34-P/TM-9-
2815-224-34-P0333.htm

Now I need to determine if it is working...

Thanks,

Glenn

--- In WanderlodgeForum@yahoogroups.com, "Glenn Allen"
wrote:
>
> I am trying to issolate why my tach is not working. I am starting
> with the sending unit. After a little help, I have finally found
the
> sending unit.
>
> The unit looks like a gearbox with an A-Frame clamp holding it to
the
> engine block. On top of the gearbox is a Hex column about 3-4"
long
> with an flat-1" dia circular electrical connector on top with two
> wires exiting.
>
> Has anyone performed any trouble shooting on this type of sending
> unit? Do I remove the A-Frame clamp to check the gear box? Is
there
> an easy method to check the pulse output short of using a scope?
>
> Thanks,
>
> Glenn Allen
> 1986 PT-40
> Marietta, GA
>

[John Ely]

Glenn:
Just in case...
If the problem with the tach is that it reads anything but the correct
engine rpm; in other words, it's all over the place, you might want to
look at battery voltage before hunting the solution elsewhere. I've
found that if my battery voltage is not in the high 12s, the tach
becomes unreliable. This can happen if alternator output is off for
whatever reason, dirty connections, bad batteries, and the like.

Good luck to you,
John Ely, 86PT40


--- In WanderlodgeForum@yahoogroups.com, "Glenn Allen"
wrote:
>
> I am trying to issolate why my tach is not working. I am starting
> with the sending unit. After a little help, I have finally found the
> sending unit.
>
> The unit looks like a gearbox with an A-Frame clamp holding it to the
> engine block. On top of the gearbox is a Hex column about 3-4" long
> with an flat-1" dia circular electrical connector on top with two
> wires exiting.
>
> Has anyone performed any trouble shooting on this type of sending
> unit? Do I remove the A-Frame clamp to check the gear box? Is there
> an easy method to check the pulse output short of using a scope?
>
> Thanks,
>
> Glenn Allen
> 1986 PT-40
> Marietta, GA
>