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Topic Summary

Posted by: Shark49
« on: August 04, 2022, 06:47:00 AM »

just for everyones edification, It was indeed the flapper and I ended up replacing the copper spring on outside and no vapor lock whatsoever.  Also, as others have suggested I floor the pedal when starting it after its been ran for a while and hot.


Posted by: Shark49
« on: April 10, 2022, 10:11:41 AM »

I' m in Charlotte, NC and getting bad vapor lock conditions after driving it and its in the 50-60's right now.  My carb gets hot to the touch.  Besides running fuel lines too close to the engine and exhaust, flapper malfunction is another major cause of VP from what I have been reading. 
Posted by: SteveKfl
« on: April 10, 2022, 09:11:20 AM »

I realize most of you guys live in much colder climates than me (and I don't know how you do it), and "need" warm up, and I'm certainly not questioning the expertise of the "carb master" (IMO), but since my South Florida L-head, came to me with "no flapper at all", I'm wondering how measurable are the results of either "my no flapper", or a "wired open" flapper in a warm climate condition, or like "just summer use"? 
 
That's possibly two different impacts, and I can see that my existing "square box chamber" can not have effective exhaust "flow", and also that the "square box" was "eliminated" with the F-head manifold.  Is the "lack of a flapper" worth me having to put one in at this point?  Any thoughts and or opinions on this will be appreciated. 
 
BTW... it also came with no PCV and only the "drip tube", which I've already heard has the similar impacts of the "sludge buildup".  Amazing as it seems "now with all of the information so far", the plugs and insides of the intake and head, and exhaust manifold and original exhaust system, were not all carboned up and actually quite "normal looking" for the age and 87K miles indicated on it's "working speedo".  I haven't dropped the oil pan for a peek in there tho.  Thanks for any thoughts/suggestions.
Posted by: Shark49
« on: April 09, 2022, 05:29:20 PM »

ya my spring was mounted wrong but it might be worn out or a PO bent it as it doesnt close the flap fully once heated up and bounces instead.
Posted by: scoutpilot
« on: April 09, 2022, 11:18:34 AM »

A great video by Metalshaper. If I may add to his narrative. With the valve wired open (full bypass) there will be excessive carbon buildup on the plugs, the valves, and in the oil, caused by the overly rich mixture entering the cylinders during the longer warmup. Think more frequent oil changes. Think very poor fuel mileage. Think a steeper curve to overall poorer performance. Think a motor that won't last as long as when the valve is functioning properly.
Posted by: Shark49
« on: April 09, 2022, 06:23:19 AM »

I took it for a spin yesterday and jeep ran fine.  Got home and had the air horn off and saw fuel bubbling out of the carb a little.  The carb body itself was pretty hot.  Lots of heat soak going on here.  I am thinking its the exhaust bypass flange not working properly.  When stopped it sits at about 4 oclock.  When running its kinda bouncy so I think the spring is bad or not correctly mounted.

found this great video:

https://www.youtube.com/watch?v=EiKVmaRjxlU

I have read on forums that a lot of folks just tie the flap up so its closed all of the time and don't have problems.
Posted by: Shark49
« on: April 04, 2022, 07:04:50 PM »

Thanks Russ I found that link as well.

I found a link to 356 porsche solex carbs washer but got no answer from them so I ended up buying a copper washer kit on amazon that should cover me for many things.  As soon as I get it in Ill let y'all know how it goes.

Posted by: Rus Curtis
« on: April 04, 2022, 09:32:27 AM »

I may be oversimplifying it since I've got no experience with this type of setup but, I googled, "Solex Banjo fitting," and got a lot of returns.  There was even one link to a thread on the CJ2A forum seeming to address size.

https://www.thecj2apage.com/forums/solex-carb_topic31866.html

There's plenty more links out there but I would assume nearly all banjo fittings use copper seals.  Measuring and then going to a local shop (take the banjo fitting with you), like suggested above, should get you a seal that will fit.  May be a good idea to replace both sides.
Posted by: Shark49
« on: April 03, 2022, 07:56:58 PM »

I can't find it offered anywhere can anyone point me to where to get it?
Posted by: scoutpilot
« on: April 03, 2022, 09:20:55 AM »

Yes.
Posted by: Shark49
« on: April 03, 2022, 07:08:45 AM »

is there supposed to be a gasket on the carb side of the fitting?  Mine only has it on the bolt head.
Posted by: scoutpilot
« on: April 03, 2022, 04:25:29 AM »

Yes. That banjo fitting will leak. The long arm of the connecting tube holds the unsupported weight of the filter too far out. A steel tube from the pump to the filter is required here.
Posted by: PercyUK
« on: April 03, 2022, 03:22:54 AM »

Hiya, I have a solex and they are "interesting" for want of a better word. When the engine is hot and you turn it off fuel is sucked out of the unit and pools in the manifold. Carter's don't do it because they are designed differently. When you go to restart do not put your foot on the gas or else it simply floods as there is already fuel present.
If it doesnt start after a few cranks then, and only then, try a few pumps on the pedal and you should be good. There is a lot of talk about the Solex being affected by high fuel pressure. I made a thicker spacer to put between the block and fuel pump to reduce mine and it seems to be fine.
Barring any actual blockage I think that this will be your problem.
Good luck
Posted by: Shark49
« on: April 02, 2022, 07:05:49 PM »

so after hours trying to find fittings I got it hooked up but now its spraying fuel out of the banjo fitting. wondering if the fuel line I am using is too narrow causing excessive pressure now.  Can't frigging win.
Posted by: SteveKfl
« on: April 02, 2022, 02:56:09 PM »

I'd suggest using the filter's 90 degree fitting at the pump output, instead of the filter, and use your other same parts to relocate the line away from the heat.