ok....

So if the return outlet is on top and the engine won't start (after a
day of sitting still) unless I crank it for 30 secs or so.. then what
could the problem ? To me it seems that it is acting like there's no fuel.

Mike Romain wrote:

> The carb doesn't matter unless it won't run at the CJ carb's pressure
> which is a different problem. It is just physics with the gas lines.
> If the return is up top, gas won't syphon.
>
> There was a thread back a while ago about the pressure that filter is
> set for. Some place around 5 psi I think. It is set by the hole size
> in the return line outlet. Lower pressure could be had by drilling out
> the blocking plate.
>
> Mike
>
> Ron Croonenberg wrote:
>
>>I just checked the CJ the off center outlet is on top
>>I don't have the original carb anymore I have that weber one
>>
>>Mike Romain wrote:
>>
>>
>>>The parts stores around here all carry the CJ gas filter. The YJ up to
>>>91 uses the same one. Once it is in place it won't rotate unless
>>>bumped, but it 'is' easy to rotate if you are mucking about with the
>>>carb.
>>>
>>>I find the Haynes CJ manual to be a very good one. It covers pretty
>>>much everything accurately.
>>>
>>>The owners manual even mentions the right way to install the fuel
>>>filter.
>>>
>>>Mike
>>>
>>>Ron Croonenberg wrote:
>>>
>>>
>>>>Ok, let me check that.
>>>>
>>>>It always had that problem, also when I replaced the fuel pump.
>>>>I can check to see if the filter is upside down or not.
>>>>
>>>>If it is the fuelfilter doing that, are there any better ones ? How do I
>>>>know I have the correct one ? (Is there a pic of one somewhere ?
>>>>
>>>>Is there a "everything you wanted to ask about your CJ's fuel lines but
>>>>were afraid to ask" page somewhere ?
>>>>
>>>>
>>>>
>>>>>That usually happens because the gas filter is in upside down. The
>>>>>filter has two outlets, the center outlet leads to the carb and the
>>>>>'top' one leads to the return line. If the return line isn't at the
>>>>>top, gas will syphon back to the tank air locking the line and they are
>>>>>real buggers to start up.
>>>>>
>>>>>There also is a valve on the fuel pump likely to stop backflow. You
>>>>>could first make sure the filter is right, then take the line off the
>>>>>pump intake to see if the gas all comes out.
>>>>>
>>>>>Mike
>>>>>86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
>>>>>88 Cherokee 235 BFG AT's
>>>>>Canadian Off Road Trips Photos: Non members can still view!
>>>>>Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
>>>>>(More Off Road album links at bottom of the view page)
>>>>>
>>>>>
>>>>>Ron Croonenberg wrote:
>>>>>
>>>>>
>>>>>
>>>>>>Hi all,
>>>>>>
>>>>>>it seems that if my '79 CJ5 is sitting for a while that the gas
>>>>>>runs through the line back to the tank.
>>>>>>
>>>>>>That means that after it has been sitting for a while. I have to crank
>>>>>>it for a while before it starts. (if it sits for a day or so.. I have
>>>>>>to crank it quite a bit. If it sits there for an hour or 2 there's no
>>>>>>problem
>>>>>>
>>>>>>I replaced all the hoses.
>>>>>>
>>>>>>How does the gascap work ? is it supposed to seal the gastank,
>>>>>>or doesn't it matter ? The gascap I have is probably the original.
>>>>>>
>>>>>>thanks,
>>>>>>
>>>>>>Ron