[C320-list] Fuel sender Removal and Ohm readings

[Bruce Stanley]

Hi All
the fuel Sender fix, continues. Following, Jeff's instructions,
I was able to remove the fuel Sender! Thanks Jeff.

After removing the Sender the Ohm readings are as follows:
(12v Multimeter Ohm setting on 200)
The Fuel Gauge reads FULL, with the fuel Tank near empty.
Sender Float in Full Position = 31.3 OHMS
Sender Float in 80% Full position = 195.4 OHMS
Sender Float in Empty position = null

Does this mean the Sender fails after the 80% Empty Position?
Think I am chasing a new Fuel Gauge?!

all comments appreciated

Bruce Stanley
Sydney

On Sun, Jun 29, 2008 at 12:21 PM, Jeff Hare <catalina at thehares.com> wrote:
>
>> Hi Jim,
>>
>>   The starboard shelf board is very close to the top of my tank as well.
>>
>> I used a socket wrench with a Phillips screw driver socket to remove the
>> screws.
>> You don't need hardly any clearance to remove the sender.  About 2 inches
>> is
>> all that's necessary since the sender float is connected at the end of a
>> thin piece of wire so it can be slid out sideways.
>>
>> I dropped in the port side aft locker and reached in between the rudder
>> post
>> and the cabin wall.
>>
>> But with the extreme heat, it's no fun.  I wired my stern rail speakers in
>> 95 degree heat and hated every minute of the job.
>>
>> I tend to budget my fuel for 1 gal / hr of motoring.  That pretty much
>> ensures that I don't drop below 1/4 tank.  So, when I've motored for 12-18
>> hours, I start looking for a place to top off.  I also used to strap a 6
>> gallon jerry can of diesel on the transom for comfort, but only used it
>> once
>> because I didn't feel like waiting for the line at the fuel dock.  :)
>>
>> -Jeff
>>
>> PS:  Before you unscrew the Sender plate,  Mark the orientation with a
>> Black
>> magic marker and save yourself the frustration of figuring out the
>> orientation when putting the thing back in..  The screws on the sender are
>> spaced in a way that you'll only get all 5 of them back in with the plate
>> facing the same way it came out.  They're CLOSE in other orientations but
>> they won't all go in which was a real pain.
>>
>> -----Original Message-----
>> From: c320-list-bounces at lists.catalina320.com
>> [mailto:c320-list-bounces at lists.catalina320.com] On Behalf Of
>> james_delong
>> Sent: Thursday, June 26, 2008 10:17 AM
>> To: c320-list at lists.catalina320.com
>> Subject: [C320-list] Fuel sender
>>
>> I'm having the same problem...getting the floor boards off the top of the
>> fuel tank. After unscrewing them, the inboard one simply slides about 6
>> inches. Can't get it up, can't twist it, slide it further or anything.
>> Almost, but resisted, cutting the damn thing in half to get it out!
>>
>> Any advise on how to get to the sender? Someone mentioned an access hatch
>> in
>> the stern cabin. 453 doesn't have one. Just a solid wall.
>>
>> Any ideas are welcomed!
>>
>> Jim #453
>>
>>
>>
>>
>> Thx Chris
>> The fuel tank is 20 engine hours from full ... think that is something
>> like 20x1.3 litres ... therefore 26 litres off the full 72 capacity.
>> That would leave 46 litres still in there. I have tried tapping the
>> side of the tank with a screw driver handle and cannot detect a
>> different 'note' telling me what the level is.
>> Guess I will pull the sender to see what is going on down there ...
>> problem getting the locker board out of the way ;(
>>
>>
>