Navman Fuel 2100

MarkM · 12 December 2005, 19:17

At the Navman-site it says: Suitable for carbureted 2- stroke engines from 50-300hp carbureted 4-stroke engines from 90- 300hp. Minimum flow rate 5 litres (1.3 US gallons) per hour.
Is there anyone who uses the Navman Fuel 2100 with an injection engine?
I want to use it with an Evinrude DI engine of 250hp. Is that going to work?
Please help me out.

roycruse · 12 December 2005, 19:32

Ive got my F2100 in my hand as I've just received it from the states (< £70)

There is a big red sticker on the transducer bag explaining that it cannot be used with EFI engines that have a fuel return line to the tank.

Obviously in these type of engines not all the fuel traveling up the fuel line is used and a certain amount of it is returned to the tank.

If your engine has a return fuel line then you will need to use the unit designed for diesel engines where that is the norm and you have a transducer on both the feed and return lines and the unit calculates the difference.

MarkM · 12 December 2005, 19:36

Evinrudes don't have a fuel return line to the tank. So it's OK?

codprawn · 12 December 2005, 22:11

Quote:

Originally Posted by MarkM

Evinrudes don't have a fuel return line to the tank. So it's OK?

I think so but what you do have to mess with is the refresh rate or update period or whatever they call it - set a long delay because the engine uses fuel in pulses and you need to measure the average.

Cookee · 13 December 2005, 08:01

Don't forget to read the operators manual or ask a dealer - the Optimax range actually mention that you shouldn't use one in thier fuel lines - not that you would need one as thier own instruments are good enough on thier own!

TIM · 16 December 2005, 18:34

With the Evinrude Injection system we found that at tick over , we were getting high readings of 20-30 l/h which is caused buy the 'pulsing' of the high pressure pump..... we solved this buy putting in about 5 foot of extra coiled fuel hose, between the sensor and the engine , which absorbed the pulsing , and made the reading accurate ....... We found that the navman stuff was accruate to about 5%

codprawn · 16 December 2005, 18:47

Quote:

Originally Posted by TIM

With the Evinrude Injection system we found that at tick over , we were getting high readings of 20-30 l/h which is caused buy the 'pulsing' of the high pressure pump..... we solved this buy putting in about 5 foot of extra coiled fuel hose, between the sensor and the engine , which absorbed the pulsing , and made the reading accurate ....... We found that the navman stuff was accruate to about 5%

Isn't that what the longer period sampling rates are for???

roycruse · 16 December 2005, 21:48

Codders is correct.

I have just finished installing mine on literally 15 minutes ago.

Whilst testing it with the engine at various rpm in neutral (as i was in my drive not on the water) I found that on the default setting of 10 seconds i was getting periods of 0 consumption followed by periods of 10 or 20 litres / hour.

I increased the Average setting to 30 seconds and i now get a stable 0.5 to 0.6 litres / hour at tick over.

MarkM · 17 December 2005, 10:10

Thank you all for the answers. In the meantime I've got an answer from Plastimo and they say it should be ok.

Cookee · 19 December 2005, 09:12

Ask Plastimo if they will take on the warranty of your engine as well!

If you have an engine problem and the dealer says it's the fault of the Navman stuff you won't have a leg to stand on - ask them as well!

roycruse · 19 December 2005, 09:22

Quote:

Originally Posted by Cookee

Ask Plastimo if they will take on the warranty of your engine as well!

If you have an engine problem and the dealer says it's the fault of the Navman stuff you won't have a leg to stand on - ask them as well!

Seriously - how can a tiny plastic impeller hurt your engine...

I had this thing in my hand before I fitted it and you could blow through it with out any resistance at all.

The extra resistance to the flow of fuel would be similar to the addition of a couple of meters of extra fuel pipe - or a pipe joiner. It would certainly be a lot less than the fuel filter or a single elbow joiner.

Cookee · 19 December 2005, 10:28

Quote:

Originally Posted by roycruse

Seriously - how can a tiny plastic impeller hurt your engine...

I had this thing in my hand before I fitted it and you could blow through it with out any resistance at all.

The extra resistance to the flow of fuel would be similar to the addition of a couple of meters of extra fuel pipe - or a pipe joiner. It would certainly be a lot less than the fuel filter or a single elbow joiner.

That isn't the point - I agree with you, but nevertheless Mercury for instance, actually mention in their manual that you shouldn't fit anything like that or even an inline filter, and manufacturers are strict about things like this when it comes to warranty claims.

MarkM · 19 December 2005, 13:14

This afternoon I received a second mail from Plastimo that says it's ok. Only concern: there should not be a return hose from the engine to the fuel tank.
I've discovered that the one from Evinrude is the same as the one from Navman.
So I'm ordering the Evinrude one, bit more money but no problems with the warranty.

codprawn · 19 December 2005, 20:32

Quote:

Originally Posted by Cookee

That isn't the point - I agree with you, but nevertheless Mercury for instance, actually mention in their manual that you shouldn't fit anything like that or even an inline filter, and manufacturers are strict about things like this when it comes to warranty claims.

How exactly will they find out??? If they are being that stupid I am sure the installation could go back to normal before anyone sees it!!!