Stupid fuel filter question

Post by **Hellfish** » Mon Oct 05, 2009 9:34 pm

The Haynes manual I have shows the fuel filter being behind the banjo bolt fuel inlet, and another one being inside the fuel pump inlet. OK, but the carb I have doesn't look like the one in the manual and neither does the pump.

My SU has a smooth inlet nipple leading into the float bowl, but no filter that I could see. The fuel pump mounts vertically, instead of horizontally like the one in the manual and the inlets/outlets are different. None of the pictures of pumps I saw online look like this one, but it's clearly very old.

Is the fuel filter(s) intended to be external in this configuration?

I'll get some pictures tonight.

Post by **bmcecosse** » Mon Oct 05, 2009 10:33 pm

Only early carbs had a filter in the float chamber inlet - and it sounds like you have a non-standard fuel pump.

Post by **Hellfish** » Tue Oct 06, 2009 5:22 am

Hmmm... The Haynes manual covers Minors from 56-71, but that's the only type of carb discussed! I'll a place a filter inline then.

Here's the pics. The carb is actually from a 2 carb set up, but a similar carb is on the engine.

Post by **bmcecosse** » Tue Oct 06, 2009 7:21 am

Yep - another HS2 carb - the piston is stuck UP! No filter in that carb.
PM sent.

Post by **Hellfish** » Tue Oct 06, 2009 4:03 pm

Yeah, those carbs are just on the shelf and will eventually get installed. There's oil in the pot, and the pistons move freely, but are a little bit stiff. The pistsons in both carbs clearly need some lubrication. The one currently in the car is fine.

Luckily, I still have my syncrometer from when I had a '67 Volvo 122s with dual SUs. My memory for tuning them isn't so great, but I'll read up on that when we're ready to install the dual intake.

Post by **katy** » Wed Oct 07, 2009 4:31 pm

IIRC those Bendix pumps have a filter in the bottom. Right on the bottom is a small hexagon piece for a wrench, about 5/8", maybe 11/16", turn it counter-clockwise and the bottom comes off the pump.
I haven't seen one of them pumps for about 40 or 50 years, we used to use the 6 volt ones on the flathead fords.

Post by **bmcecosse** » Wed Oct 07, 2009 9:40 pm

Don't use ANY form of abrasive on the carb pistons or bells! Just clean thoroughly - and very lightly lubricate with the thinnest oil you can find.