Author Topic: How to remove the fuel sending unit from the gas tank?  (Read 1328 times)

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Offline DeathMammoth

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How to remove the fuel sending unit from the gas tank?
« on: March 09, 2022, 08:23:24 AM »
Hello Everyone,

This is my first post on this forum, and I was wondering if someone on here can help me out or point me in the right direction!

I have a 1976 Honda CB750A Hondamatic and I want to remove the fuel sending unit from the tank, so that I can treat the tank with the POR-15 Fuel Tank Repair Kit since the inside of the tank is a little crusty and rusty.

I see the rubber cover for the unit, but I don't know if I can just peel that off or does that stay on and I twist the whole thing off etc.? Any help would be much appreciated, or even better if someone could provide a step by step that would be super helpful!

Thank you so much everyone in advance and happy to join this forum!
« Last Edit: March 09, 2022, 08:26:05 AM by DeathMammoth »

Offline Don R

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Re: How to remove the fuel sending unit from the gas tank?
« Reply #1 on: March 09, 2022, 10:11:11 AM »
 The auto tank has a sending unit.
https://www.partzilla.com/catalog/honda/motorcycle/1976/cb750a-a-750-hondamatic/fuel-tank

  Honda throws out that 750a thing a lot, must have happened before they called the auto bike an A
« Last Edit: March 09, 2022, 10:17:44 AM by Don R »
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Offline Don R

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Re: How to remove the fuel sending unit from the gas tank?
« Reply #2 on: March 09, 2022, 11:17:46 AM »
 I think the rubber stretches over the sender lip and then the sender turns so the tabs line up with gaps.
 Oh, welcome to the SOHC4 forum.
« Last Edit: March 10, 2022, 10:35:15 AM by Don R »
No matter how many times you paint over a shadow, it's still there.
 CEO at the no kill motorcycle shop.
 You don't need a weatherman to know which way the wind blows.

Offline Don R

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Re: How to remove the fuel sending unit from the gas tank?
« Reply #3 on: March 29, 2022, 08:46:48 AM »
 Did you have any luck with the sender and POR15?
No matter how many times you paint over a shadow, it's still there.
 CEO at the no kill motorcycle shop.
 You don't need a weatherman to know which way the wind blows.

Offline desertrefugee

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Re: How to remove the fuel sending unit from the gas tank?
« Reply #4 on: March 29, 2022, 09:25:32 AM »
Did you have any luck with the sender and POR15?

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'86 Vmax, '83 ZN1300, '78 GL1000, '75 CB750 K5, '78 F4

Offline Don R

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Re: How to remove the fuel sending unit from the gas tank?
« Reply #5 on: March 29, 2022, 10:52:19 AM »
 The OP got some bad info that's been deleted. OP might have gotten PO'ed.
No matter how many times you paint over a shadow, it's still there.
 CEO at the no kill motorcycle shop.
 You don't need a weatherman to know which way the wind blows.

Offline desertrefugee

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Re: How to remove the fuel sending unit from the gas tank?
« Reply #6 on: March 29, 2022, 02:49:26 PM »
Oops.  Missed that.
'86 Vmax, '83 ZN1300, '78 GL1000, '75 CB750 K5, '78 F4

Offline DeathMammoth

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Re: How to remove the fuel sending unit from the gas tank?
« Reply #7 on: April 05, 2022, 11:16:38 AM »
Did you have any luck with the sender and POR15?

Hey Don! Sorry I haven't been back on the forums till now! My motorcycle was in storage, and I just brought it out a little while ago (Gotta love living in Canada). After looking at the schematics you posted, I was able to pop the rubber cover off and pull the wiring through the hole. Than I was able to turn the fuel sending unit cap off by using an Allen wrench between two of the little "prongs" and turning it counter-clockwise. After that the fuel sending unit came out flawlessly!

When I removed the petcock, I didn't realize there was a screen associated with it, but I was able to use a LONG screw driver to tap the top of the screen just enough so I could use a pair of pliers to pull it out. This would have been bad if I would have treated the tank with that inside! Haha!

As for the POR-15 treatment, I was a little worried at first after reading some of the bad reviews. However, I followed the instructions to a T, and the final results were fantastic! I think the issue people are having with the product, is that they rush through and don't take their time with the treatments/steps. Not only did I leave a heat gun for a few hours after the metal prep was done (Step 2), but I let the tank dry out for a whole day before using the sealer (Step 3).

So, thank you so much for your help Don!! I was able to successfully remove all the gas tank hardware, and successfully seal the inside of the gas tank. After reviewing the end results, I think this tank will be good for the life of the motorcycle! :)
« Last Edit: April 05, 2022, 11:19:04 AM by DeathMammoth »

Offline Don R

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Re: How to remove the fuel sending unit from the gas tank?
« Reply #8 on: April 05, 2022, 01:27:49 PM »
 That's awesome. I'm glad to be of assistance.
No matter how many times you paint over a shadow, it's still there.
 CEO at the no kill motorcycle shop.
 You don't need a weatherman to know which way the wind blows.