Datsun Roadster Forum-311s.org

So if my tank is empty and the gauge is reading 1/8 to 1/4 what do I adjust on the gauge?

Thanks

Here is a link that goes into more detail about adjusting the early fuel gauge. The thread topic is about the gauge voltage regulator, but then goes on to describe various methods to adjust the fuel gauge. Maybe this might be of some help :

viewtopic.php?f=3&t=24789&p=222850=back ... th#p222850

Mike

rwmann wrote: Wed Jul 21, 2021 1:56 pm The slots are on the back side of the combination gauge, at about the 8-o'clock and 7-o'clock positions looking at the gauge from the rear.

Enjoy crawling underneath the dash to access them!

download/file.php?id=57770&mode=view

Thanks, I was more referring to this post in this thread.

Slot at 8 o'clock adjusts the "Full" reading, slot at 7 o'clock adjusts the "Empty" reading. Similarly for the Temperature gauge adjustment slots.

That said, I can't recall what direction on the gauge a clockwise tweak produced (and vice versa), but do recall it took a couple of SWAGs to get it close to what I considered 'correct', and who knows whether it really is. The gauge was never really known for precision.

Precision gas gauge…when the car sputters you have 2 gallons left!

theunz wrote: Mon Aug 02, 2021 4:25 pm 84EB190F-5FF0-4733-8D22-DAFFD82CDFFC.jpegPrecision gas gauge…when the car sputters you have 2 gallons left!

So, is that a spare, reserve tank? I have my EFI fuel pump in a similar tank, only mounted under the car.
Pics of my spare 67.5 combo gauge... I see slots, but they don't turn, at least with the force I was willing to apply at this point... are these what you're talking about?

Yes Greg, it’s a reserve tank. The picture was taken before I ran the feed line. It has a manual valve on the side that drains into the filler neck vent hose. Each time before I fill up I open the valve to drain the fuel into the main tank and then refill with fresh. Eliminate’s the fear of an inaccurate fuel gauge and extends your range a little.

Alright, time to dig deeper. I received a new voltage regulator and replaced the one on the steering column. Also replaced the sending float/unit. Now the gauge reads full although the tank is not full, not even close. I guess I'll remove the sending unit once again and reattach the wires as suggested and see what happens. One curiosity, part number on the regulator I received from Dean did not match the regulator part number I took out.

I don't know how those things are calibrated, but it sounds like that's the issue...

Hello all. Thanks for all the advice. The gauge is working. Not perfectly yet. Fine adjusting is necessary but it is useable. Now in my 70th year, I have reduced my expectations during COVID and just in general. The kid in the auto parts store could not find a listing for an oil filter for a 1970 Datsun SRL 311. I understand his being unfamiliar with old cars, but really, did I have to tell him five times the year, make, and model number? Yepper. Now I need to point out an exception to all this incompetency. Dean at Datsunparts.com spent an hour on the phone with me yesterday working through my issues. Um, not all my issues, only the car issues. I think it is fair to say that without all the Forum folks and Dean, I'd be in jail for arson and the car would be a charred heap in the driveway. Now it is time to write the sign for the rear of the car that says 'Watkins Glen or bust'. Or is that tempting fate? Thank you Dean et al.
George Davis

Nissan still sells the oil filters and they are really good. I have about 8 or more for stock. You can even order online but I don't.

less frustrated wrote: Sat Aug 21, 2021 10:02 am Hello all. Thanks for all the advice. The gauge is working. Not perfectly yet. Fine adjusting is necessary but it is useable. Now in my 70th year, I have reduced my expectations during COVID and just in general. The kid in the auto parts store could not find a listing for an oil filter for a 1970 Datsun SRL 311. I understand his being unfamiliar with old cars, but really, did I have to tell him five times the year, make, and model number? Yepper. Now I need to point out an exception to all this incompetency. Dean at Datsunparts.com spent an hour on the phone with me yesterday working through my issues. Um, not all my issues, only the car issues. I think it is fair to say that without all the Forum folks and Dean, I'd be in jail for arson and the car would be a charred heap in the driveway. Now it is time to write the sign for the rear of the car that says 'Watkins Glen or bust'. Or is that tempting fate? Thank you Dean et al.
George Davis

Here is an old Fram cross reference part number list based on the Fram Roadster P/N PH3639 (Thanks to Biker Mike 2012) The Fram and Wix P/N WIX 51512 are still good P/N's All of these Rockauto listings at the link should be good as well.

https://www.rockauto.com/en/catalog/nis ... ilter,5340

AC-DELCO PF1026
ATLAS M-47
AUTOPAR FE129
AWARD AOF-42
BALDWIN B295
BECK/ARNLEY 041-0704
BIG A 92512
BOSCH 72108
BOSCH 72124
CARCARE IOF3639
CARQUEST 85512
CENEX CO287
CHAMP PH2822
CHAMPION OF13
DEUTSCH D600
FACET 2825
FIAAM FT4904
FILTERS INCORPORATED OF3639
FLAG C-2825
FLAG C-2850
FLEETGUARD LF16221
FLEETGUARD LF3334
FLEETGUARD LF781
FLEETRITE LFR-83334
FORD 140516060
GENERAL MOTORS 25011623
GENERAL MOTORS 6437982
GOODYEAR L2825
GRAND PRIX PH2822
GROUP 7 L30042
HASTINGS LF387
IAPCO A-0220-006
IAPCO A-0290-001
IAPCO OF120
IAPCO OF125
IAPCO OF80
INTERNATIONAL PARTS SERVICES 4-1079
INTERNATIONAL PARTS SERVICES 4-1080
INTERNATIONAL PARTS SERVICES 4-1101
ITM 11-10000
ITM 111-0000
ITM 11-10505
ITM 111-0505
JIFFY LUBE JL42
KRALINATOR L57
LAZORLITE L11-1023
LAZORLITE L11-1066
LAZORLITE L11-1112
LAZORLITE L11-1210
LEE LF-2825HP
LUCAS GIRLING F6510
LUCAS GIRLING F6567
LUGGER 24-02202
MARATHON PH2822
MARATHON-LETOURNEAU PH2822
MASTER PARTS PH-2822
MOBIL L30042
MPA 2414
MPA 2613
NAPA 1512
NISSAN 15208-13201
NISSAN 15208-13210
NISSAN 15208-13211
NISSAN 15208-13212
NISSAN 15208-13213
NISSAN 15208-Y7502
NISSAN 15209-Y7502
OE+ OF-1140
OE+ OF-1460
PENNZOIL PZ-8
PRECISION TUNE OF-133
PRO/GAUGE PGO-42
PROMATCH 972705
PUROLATOR L30042
QUAKER STATE QS2825
SHELL L30042
STP S2870A
TARGET SF227K
TRUST PH2825
VALVOLINE VO7
VERA 10-00983
VERA 10-01006
WARNER PH2822
WIX 51321
WIX 51512

I found that the wix and fram have less internals in them. Nissan one was much heavier.

Curtis wrote: Sat Aug 21, 2021 2:59 pm I found that the wix and fram have less internals in them. Nissan one was much heavier.

I'm sticking with Nissan myself when the time comes, $5.99 ea.

Nissan oil filter number 15208-h8920