BSA Owners' Club Forum

The BSA Workshop => Singles => Topic started by: TIGERJ on 05 August, 2017, 06:22:04

Title: Fuel tap problem
Post by: TIGERJ on 05 August, 2017, 06:22:04
As some of you will remember I am in the process of finishing my SS80.
Fuel has been in the tank some time now and petrol leaking from the tap only at the moment when
Tap is off.
I am guessing that the unused brass tap which came with the parts is not ethanol resistant ?
Can anyone confirm the thread sizes.
Thanks
          Tim
Title: Re: Fuel tap problem
Post by: DEAN SOUTHALL on 05 August, 2017, 08:09:19
You could replace the tap with a Bap tap. They are leak free and easy to use and don't look too out of place
eg
https://www.draganfly.co.uk/index.php/a65anda50/category/776-petrol-taps-pipes

scroll down fpr description
Title: Re: Fuel tap problem
Post by: JulianS on 05 August, 2017, 09:33:19
If your tap is plunger type with cork seal you can replace the plunger and cork for a new one though from my experience they will start to seep after a while, I dont think cork and ethanol are entirely compatible. Some will suggest you can boil or soak the cork to restore its seal but I am not convinced that either is a long term cure.

I changed to lever types on my A10, an English made one on one side which still seeps a bit and a cheap Wassell one on the other side, made in the far east, which has proved leak free over the past 12 months.
Title: Re: Fuel tap problem
Post by: TIGERJ on 05 August, 2017, 19:54:30
I guess tank thread is BSP ANY IDEA WHAT SIZE.
Title: Re: Fuel tap problem
Post by: JulianS on 05 August, 2017, 20:13:10
Usually 3/8 x 19 tpi BSP.

Some replacement taps are 1/4 x 19 tpi BSP but there are adaptors available for tank to tap in that case. Had to use such on my A10 when I abandoned the original taps.
Title: Re: Fuel tap problem
Post by: TIGERJ on 08 August, 2017, 18:21:14
3/8 BSP is correct for my tank.
Got an adapter as you said.
Also purchased BAP type tap (no idea what BAP means)
Hopefully soon road ready
Thanks
           Tim
Title: Re: Fuel tap problem
Post by: TIGERJ on 10 August, 2017, 20:20:47
Just about to fit the replacement fuel tap and feed.
Is PTFE TAPE ok for use on the threads ??
Tim
Title: Re: Fuel tap problem
Post by: Bess on 10 August, 2017, 20:27:20
Hi TIGERJ,
                  PTFE and petrol is okay:

https://www.calpaclab.com/teflon-ptfe-compatibility/

Chart says A2-Excellent

Best wishes...
Title: Re: Fuel tap problem
Post by: TIGERJ on 10 August, 2017, 20:38:50
Bess
What a mine of information you are.
Many thanks for such a quick reply.
Regards
           Tim
Title: Re: Fuel tap problem
Post by: Bess on 10 August, 2017, 20:59:23
You're welcome :)