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Frequently Asked Questions
- What is the update time? 2.5
seconds for the original gas Tiny-Tach™ and 1/2 second for commercial
Tiny-Tach.™
- How do you hook it up? You have two wires at the engine.
The red wire (antenna wire) wraps 3-4 times around the plug wire. The white wire has a lug
to put under a bolt head for ground.
- How is the Tach powered? A 3 volt lithium battery is used
for the original gas Tiny-Tach™ and the commercial unit. The commercial unit requires additional
outside power such as a 9-volt battery hook up.
- How long does the battery last? The lithium battery life
is estimated at 5+ years. With external power applied to the commercial unit, the internal
battery recharges as power goes to the unit extending the battery life. Both tachs are warranted
against defects (but not wire damage) for a period of one year from date of purchase.
- How many models are there? There are 3 different modes of
the original Tiny-Tach™ relating to how the engine cylinder fires:
- 2C for 1x per revolution (typically for Briggs, Honda and Kohler type engines);
- 1C for cylinders firing 2x per revolution (2 cylinder personal watercraft such as
Seadoos typically fire this way); and
- 4C for cylinders firing every other revolution (typically K series Kohler engines)
- The commercial unit, CTT-APR, can be programmed for different firing sequences.
- Will the Tiny Tach work on multi-cylinder engines? Yes.
Some multiple cylinder engines require a filter to cut out electric noise. The filtered "X" models
are made to order for you. Call DTI for information if you have
a multi-cylinder engine.
- Do you make a model
for resetting the hours? Yes, it is called an R, instead of an NR.
- Why does my 2C Tach read double on my two cylinder
engine? It can be one of two reasons, It can be picking up the other cylinder signal
or your engine fires each plug 2 times/rev. Note:
Some single cylinder
engines do this also, i.e. ATV's.
- Can you lengthen the wire (all models)?
No. You must send your Tach to DTI and they
can lengthen the coaxial wire there.
- Why does my 1-c Tach read 1/2 time on a 2 cylinder engine?
You need to attach the wires to
BOTH cylinders. Make sure you use only 3 wraps with the wire.
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