Smart craft fuel display

Jizm · 26 September 2010, 19:58

Another question,
does anyone know how a fuel sender connects into the smartcraft guages? Wire colours etc? Googled it but no joy. Trying to find a schematic, the display shows fuel but can't see where to connect it in?
ta.
Jiz

martini · 26 September 2010, 20:20

Memory's a bit faded from when I did my build, should have the wiring instructions at home somewhere, will dig it out and attempt to scan it

Ian Sharlot · 26 September 2010, 20:36

you should have a loom coming out of the engine, there should be a blue wire and a pink wire, one goes to the oil tank and the other is for the fuel tank, I think blue is for the oil tank so pink would be fuel but not 100% on that bit.

martini · 26 September 2010, 20:49

Cant find any info here but it's starting to come back to me...

Merc do a smartcraft "boat harness" that connects to your fuel & oil tanks and your paddle wheel speedo. I think theres a 4 pin and a 6 pin plug on the motor that this plugs into. Then the info is sent up the can-bus with the rest of the engine data to the gauges.

Part number for the boat harness: 84-859743T

Google the part number and you'll get more info

Jizm · 27 September 2010, 06:31

Thanks for that, just need to find the fuel sender as I have the oil tank and the paddle wheel, and go from there.

Kernow Buoy · 27 September 2010, 08:03

Quote:

Originally Posted by Jizm

Another question,
does anyone know how a fuel sender connects into the smartcraft guages? Wire colours etc? Googled it but no joy. Trying to find a schematic, the display shows fuel but can't see where to connect it in?
ta.
Jiz

In the fuel/paddle/oil harness there's a pink wire with a black line on marked 'fuel 1' which is for the main tank, for twin tanks there's pale blue wire again with a black stripe marked 'fuel 2/other'.

Jizm · 27 September 2010, 12:45

Quote:

Originally Posted by Kernow

In the fuel/paddle/oil harness there's a pink wire with a black line on marked 'fuel 1' which is for the main tank, for twin tanks there's pale blue wire again with a black stripe marked 'fuel 2/other'.

Ah, thanks that concurs with the link from Martini! Standard analogue signal from the sender I take it?
Jiz

martini · 27 September 2010, 15:11

It is analogue but I did have to specify I was using smartcraft to Wema when I got my senders made. Think the resistance works the other way round to other gauges?

Downhilldai · 27 September 2010, 15:27

Yep, Smartcraft uses US resistance senders.

Jizm · 27 September 2010, 15:31

normal is about 30-250ish ohms so whats a US one?

Downhilldai · 27 September 2010, 16:28

One is 240 - 33 ohms, the other is 0 - 100 ohms.

Jizm · 27 September 2010, 18:55

Quote:

Originally Posted by Downhilldai

One is 240 - 33 ohms, the other is 0 - 100 ohms.

ok mine reads 2.4Kohms!!!!!

Jizm · 27 September 2010, 19:50

The guages are version 2.80 and now I am scrolling through they do not display fuel level. Which guage usually displays fuel level, speedo or tacho?

martini · 27 September 2010, 20:13

Probably need to go into cal1 and set it to show the fuel screen. Should be on the speedo

Jizm · 27 September 2010, 20:17

OK, thanks. Getting dark now...

markg · 27 September 2010, 21:23

http://img286.imageshack.us/img286/1...tcraft15lg.jpg
http://www.mercurymarine.com/_media/...eed_Manual.pdf

Jizm · 28 September 2010, 10:01

Quote:

Originally Posted by markg

http://www.mercurymarine.com/_media/...eed_Manual.pdf

cheers for that...
could see any refernce to the connection on the first link though?

markg · 29 September 2010, 00:20

Quote:

Originally Posted by Jizm

cheers for that...
could see any refernce to the connection on the first link though?

i just posted that so that you could see what other folks had said about the sender wireing connecting at the motor and the info comeing back to the gauges via the blue bus cable, i found it useful when i did mine,
somebody also told me that the fuel sender info is a bit unreliable and the paddle wheel for the speedo is also a bit crap, so i didnt bother with either

Jizm · 29 September 2010, 06:49

Quote:

Originally Posted by markg

i just posted that so that you could see what other folks had said about the sender wireing connecting at the motor and the info comeing back to the gauges via the blue bus cable, i found it useful when i did mine,
somebody also told me that the fuel sender info is a bit unreliable and the paddle wheel for the speedo is also a bit crap, so i didnt bother with either

I am strarting to agree, may just fit a standard fuel guage at this rate....

Jeff · 29 September 2010, 09:31

I did away with the paddle wheel (using GPS connection for speedo) but kept the fuel. If you use a Wema sender and calibrate the tank it is pretty accurate - in my experience anyway. Mine is a rectangular tank so auto calibration should work - but I found the best way to 'calibrate' was to do this with the dip sensor out of the tank and move from empty to 1/4, 1/2 , 3/4 and full
rather than trying to do this filling up at the pump. The inbuilt damping/delay means you need to wait at each 1/4 point for the system to recognise the postion before adding fuel to the next 1/4 point. ..... too slow at Tesco's !
If you dont, you only seem to get empty and full registering !?!
Jeff