E-Tec Retro

[IAMS]

Hi

Can anyone tell me if the retro Gauge on an e-tec for a 250Hp Evinrude can be calibrated?

The gauge reads a consumption of around 21Lts/Hr but on calculating it it is in fact about 50Lts/Hr @ 3700 RPM.

[Chunder]

Could your fuel flow sender be in US gal and your gauge is in litres.
Chunder

[arjen]

I also have a 250 E-Tec and have exactly the same problem, and yes it
is configured for litres. It looks like the flow amount shown in the gauge is
somewhat less than half of the actual fuel flow.

[IAMS]

I have the it set up in Liters per Hour

[Chunder]

Yes but is the fuel flow sender it self metric or imperial

[IAMS]

Hi Chunder

I'm sure all the sender does is send a pulse to the computer? From there the computer determines your setting and should convert it? Am I incorrect on this?

[arjen]

In my case it used to work correctly. At some point it stopped giving me
the correct fuel flow. It seems to give figures that are twice too small.
If it were a liter/gallon problem, than, given the 21 lts problem by IAMS, it
would mean 95lts/hour (UK gallon) or 79lts/hour (US gallon).... either way
nothing like the supposedly correct 50lts.
In my case, at WOT, the retro gauge reads 42lts/hour(!);
I also have a Lowrance EP10 fuel flow device, which reads 82lts/hour...
What's wrong here???

[johnrude]

Does the retro gauge pull its fuel use from a sender mounted inline with the fuel line? If so I do not believe these type of paddle wheel senders will show the correct fuel usage at lower rpms. You need the icommand which pulls the info from the emm.

[arjen]

Yet it works with paddle wheel mounted on the fuel line.
The problem is that it does not work correctly anymore even at
higher RPMs (see my WOT example).

[SEAHORSE]

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by arjen &raquo;</TD></TR><TR><TD CLASS="quote">Yet it works with paddle wheel mounted on the fuel line.
The problem is that it does not work correctly anymore even at
higher RPMs (see my WOT example).</TD></TR></TABLE>


You should temporarily attach a clear hose after the sender and run the motor while looking for air bubbles which will affect the accuracy of the fuel flow reading.

[Chunder]

Has the sender moved its location and allowing fuel to slosh back and forth giving incorrect readings.
Chunder

[arjen]

The sender did not move. The incorrect readings are very consistent, it always
seems a fixed factor (0.5) off the correct value. It almost seems like the fuel flow sender contains two paddle wheels and one of them is not working...