Go Back  Offshoreonly.com > Technical > General Q & A
Sending units >

Sending units

Like Tree6Likes

Sending units

Reply

Old 10-21-2019, 12:41 AM
  #1
bck
Charter Member#568
Charter Member
Thread Starter
 
bck's Avatar
 
Join Date: Dec 2000
Location: Western N.Y.
Posts: 2,134
Default Sending units

Not sure of the year of the gauges and of course with the confusion of two Gaffrig companies I dont know which I have or which to call for assistance. I'd really like to just pick one up locally without having to call and wait/ pay for shipping on such a cheap part. So how do I get the correct sender for a Gaffrig water temp gauge? I only want one to eliminate an incorrect sender being a problem with a possible cooling issue I'm trying to resolve.
__________________
Straight bottoms and flat decks
bck is offline  
Reply With Quote
Old 10-21-2019, 09:12 AM
  #2
Were doomed!
Charter Member
iTrader: (1)
 
Wally's Avatar
 
Join Date: Oct 2000
Location: Chicago, IL
My Boat: Chris Craft Stinger 222
Posts: 5,707
Default


look around the outside edge of the gauges face...you would have to look under the rim of the gauge to see it...but the livorsi stuff will be labeled as such. or the older ones may even be labeled as autometer....should be able to narrow it down from there.
__________________
-Wally

Money can't buy happiness, but it can buy horsepower. And I've never seen a sad person hauling a$$!
Wally is offline  
Reply With Quote
Old 10-21-2019, 10:08 AM
  #3
bck
Charter Member#568
Charter Member
Thread Starter
 
bck's Avatar
 
Join Date: Dec 2000
Location: Western N.Y.
Posts: 2,134
Default

Even if I determine which gauge it is I still need to know what sender. Hoping to just pick one up locally. The issue I'm having is temperature extremes. When the engine is just warm I don't get a reading. When the engine is hot the gauge rapidly gets to 200. There's no in between. Trying to figure out if I possibly have the wrong senders. I don't really want to call the company and try to get them to tell me the specifics of the sender so I can get it locally. I also dont want to pay for a sender and for shipping and wait a week to just do a simple test on a cheap part. I have an ohm meter to test my current senders but not sure what reading I should get for these gauges to work. Figured buying what I know to be the correct sender would be easier than messing with an ohm meter at various temps. My guess is the gauges are from the 90's and since they are still good probably from the original Gaffrig when they were a known good product? I'll check the face later today.
__________________
Straight bottoms and flat decks

Last edited by bck; 10-21-2019 at 10:16 AM.
bck is offline  
Reply With Quote
Old 10-21-2019, 11:20 AM
  #4
Platinum Member
Platinum Member
iTrader: (6)
 
F-2 Speedy's Avatar
 
Join Date: May 2012
Location: Midwest & T-Rock
My Boat: F2 Speed racer
Posts: 6,463
Default

are there no numbers on the sender ?
F-2 Speedy is offline  
Reply With Quote
Old 10-21-2019, 11:27 AM
  #5
bck
Charter Member#568
Charter Member
Thread Starter
 
bck's Avatar
 
Join Date: Dec 2000
Location: Western N.Y.
Posts: 2,134
Default

I will look at it closer in a couple hrs. If there are numbers it would tell me what I don't want to buy, not sure how many options that leaves.
__________________
Straight bottoms and flat decks
bck is offline  
Reply With Quote
Old 10-21-2019, 01:26 PM
  #6
Registered
 
Join Date: Aug 2013
Location: Kemah, Tx
My Boat: Fino 30
Posts: 212
Default

I’m dealing with the same thing, but Faria gauges.

I thought I found the right sender, but like you it takes forever to show on the gauge and then it races all the way to overheating. I am going to get a variable resistor and determine what resistance is the gauge is looking for at various temperatures, and then find a sender (which have published resistance to temperature curves) and hope that works. Major PITA
sailtexas186548 is offline  
Reply With Quote
Old 10-21-2019, 04:21 PM
  #7
Registered
 
Join Date: Oct 2005
Location: Waldorf, Md
Posts: 636
Default

bc,
I would go down to the local parts store and buy a cheap mechanical gauge for $20 Run it out through the engine cover and have somebody watch it for you while you run the boat. That way you will eliminate the wiring and power source as a possible issue too.
BillK is offline  
Reply With Quote
Old 10-21-2019, 04:47 PM
  #8
Registered
 
Join Date: Aug 2012
Location: Collierville, TN and Pickwick Lake
My Boat: Cigarette Tiger, Formula, Raysoncraft, Tahiti, Angler
Posts: 1,895
Default

Sounds like you have it hooked up to a temp “switch” instead of a temp sender.
In other words, the switch is normally open then closes at a predetermined temperature.
ICDEDPPL and zz28zz like this.
payuppsucker is offline  
Reply With Quote
Old 10-21-2019, 05:04 PM
  #9
Charter Member # 55
Charter Member
 
Griff's Avatar
 
Join Date: Oct 2000
Location: Omaha
My Boat: .......32............. ............Active Thunder....
Posts: 17,102
Default

Post a pic of the gauge. I had a similar issue with one of my Gaffrig/Livorsi water temp gauges. It was a bad gauge.

Gaffrig Precision Instruments is now Livorsi
Gaffrig Performance is the current Gaffrig.
Griff is offline  
Reply With Quote
Old 10-21-2019, 05:20 PM
  #10
Registered
iTrader: (1)
 
Join Date: Jun 2009
Location: Chicago
My Boat: 38 Flatdeck
Posts: 6,186
Default

GSOT1/8

https://www.cpperformance.com/p-1307...si-gauges.aspx

that would be my guess. maybe you can find what the ohms are somewhere

Payupchump might be right thou. Maybe it`s a warning sender
payuppsucker likes this.
ICDEDPPL is offline  
Reply With Quote

OSO Sponsor
OSO Advertiser
OSO Advertiser
OSO Advertiser