our props are fixed pitch the tachometer is a direct measurement of
power. Of course you don't know the absolute hp (have to know torque)
but if you're putting out a higher RPM, you're pushing harder. So if
you're gonna have only one instrument, this is the one to have. It's the
only way to know if your machine is putting out its usual max.
This simple tach connects only to your spark plug wire with few wraps
and to the instrument with an ingenious looping system that requires no
screws. Wire tie it to a convenient location on your machine (throttle
is nice) and it's ready to run.
The readout is large enough even for my aging eyes and several functions
are well suited to our needs. It can be configured for all of the spark
types that paramotors use. It worked out of the box on my Black Devil
172. Besides current RPM, you can see the number of hours run, the
number of starts, and the max RPM attained. It also works on 4-strokes
but I didn't get to try it one of those.
When I start the motor it sometimes reads a half multiple of the RPM
then "latches on" and reads the actual RPM. It did not do this in
The guts are made by longtime fabricator Sendec whose name appears on
the unit itself.
Like most of these units you cannot replace the batteries so, when they
wear out, the unit must be replaced.