Fuel sending units

roadkingh1

roadkingh1

Member
May 4, 2008
278
Covington, La
Boat Info
97' 370DA
Engines
Twin 7.4l MPI v drive
I am looking in replacing my fuel sending units (swing arm). What is the latest sending units that searay is using or does anyone know of a better type, more accurate.
 
Trouble with sending units is do you want the reading at idle or cruise or wide open throttle. vary the throttle and you vary the tilt of the tank
and the reading.Plus the pickup is never on the bottom, so your tank capacity is "useable fuel " not how many gallons.
 
Jimmy Buoy said:
I got SSI's a few years ago and they work great! No moving parts.

http://www.cdiweb.com/datasheets/ssi/SSIFluidTrac2Wire.pdf
Click to expand...

Jim - these sensors look awesome! Are they really that easy to install? It looks like you just unbolt the old swing arm sensors and pop this right over the hole in the tank - is that correct? How difficult is the wiring after installation?

I've been having trouble with my sensors and these look like a great replacement. What do they cost???
 
Sea Ray began trying to use ultrasonic sending units a few years ago but the results were not good. Every one on new boats sold by our dealer has been replaced. The tanks and senders on the boats built in Florida come from Florida Marine Tanks, Inc. so they will be your best source of information on what they are selling now.

I recently replaced my senders with the puck type sender and they are far more accurate and dependable than the swinging arm ones.
 
Yes, they are that easy. On mine, there were two wires attached to the old sender. Just disconnect them and re-connect them to the two wires on the SSI unit. The only issue I had was that the original bolts that came out were too short for the new sender so I just got the next longer size. These senders were just right around $100 each.
 
Frank, what do you mean by "results were not good?" Are the fluctuations too great? Unless I'm reading the info sheet wrong, it sounds like these SSIs kinda "average out" the level in a delayed manner to provide a more stable and accurate reading. Just curious what the drawbacks would be with ultrasonic sensors.
 
fwebster said:
Sea Ray began trying to use ultrasonic sending units a few years ago but the results were not good. Every one on new boats sold by our dealer has been replaced. The tanks and senders on the boats built in Florida come from Florida Marine Tanks, Inc. so they will be your best source of information on what they are selling now.

I recently replaced my senders with the puck type sender and they are far more accurate and dependable than the swinging arm ones.
Click to expand...

Frank,

I did hear that Sea Ray was having problems with senders on their newer boats, but I don't think they were a simple resistor type two wire setup like the ones used in the 90's or early 2000's. I have yet to have any issues with my SSI senders. That being said, a fellow boater with an older 37' express tried them on his, but the pickup tubes were too close to the senders, causing false readings. My tanks do not have this issue. The ultrasonic beam becomes wider as it goes deeper into the tank, so if must have enough clearance to avoid this issue. The OP should have the same fuel tank setup as my boat (or so one would assume).
 
Jim - here's a look at my fuel tanks setup. Do you have a similar setup? Think the senders and pickups are too close together on this for the SSIs?

SRFuel_zpscc44824a.jpg
 
radiojon said:
Frank, what do you mean by "results were not good?" Are the fluctuations too great? Unless I'm reading the info sheet wrong, it sounds like these SSIs kinda "average out" the level in a delayed manner to provide a more stable and accurate reading. Just curious what the drawbacks would be with ultrasonic sensors.
Click to expand...



"Sea Ray began trying to use ultrasonic sending units a few years ago but the results were not good. Every one on new boats sold by our dealer has been replaced."

"Not good" means the marina changed out 100% of the OEM ultrasonic senders.....I have no idea whose senders SR was using, but 100% failure rate made me choose the puck type, particularly on diesel boats where there is a return stream running back in the tanks all the time.
 
radiojon said:
Jim - here's a look at my fuel tanks setup. Do you have a similar setup? Think the senders and pickups are too close together on this for the SSIs?

SRFuel_zpscc44824a.jpg
Click to expand...

From the look of this diagram it appears that the pickup tubes are near the end of both tanks while the sending units are closer to the middle of the tanks. Should be ok. Check to see the supplier's return policy. My buddy didn't have any issues returning his.
 
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