"Tiger" caro01_at_triparish_dot_net wrote in message
...
Let me just add one thing to what Camilio said. The sender unit is like a
dimmer for a light with one exception, there is no "start" and "stop"
points. You can spin it 360°. This being the case, if the adjustment is
off by a little bit it will go from full up to full down immediately. I
had
this problem with my Volvo Penta SX Cobra outdrive. All I had to do to
repair it was take the sending unit and readjust it for the gauge. Hope
this helps.

I didn't know that there were senders like this - my OMC outboard sender (an
older motor, fwiw) has a start and stop point - it's got an arm that goes
from up to down. It is adjustable though, just not a lot. Thanks for
pointing this out - If his is also the circular type, and or any type that
came loose or out of adjustment, it could affect his readings.