Carburetor and Fuel System
Title: Linkert
leaking
Post by PanPal on Aug 31, 2004, 1:01pm
You may find some information on this section. The thread is titled Linkert Question.
Post by shaker on Aug 31, 2004, 3:42pm
you may have one of the old cork floats, they swell and get heavy when they get old, i had the same problem with my 49 , i put one of cottens lights floats in my 74-b . set it like palmers book says to set brass floats , have not had any problems , dont forget to check for manifold leaks when you put things back together.
Post by Cotten on Aug 31, 2004, 10:18pm
It would seem that both your petcock and your floatvalve are letting you down. (Never does only one thing go wrong at a time.)
Floatvalves need only hold back for a few minutes in service, but petcocks must be absolute.
Linkerts also have a peculiar ability to siphon through the vent holes on M74B's.
I clearly remember working in my open garage one morning as a warm spring thunderstorm blew in. I heard a faint gurgle. Soon I smelled gas.
Two of my own, and a customer's machine all with M74B's, .... all with decent petcocks, ... suddenly had purged their bowls simultaneously.
(insert twilight zone theme)
Post by Jack Hester on Sept 1, 2004, 2:35pm
PH Jim -
Glad to hear that you are keeping the Linkert. One fine carb. Probably the finest thing that can go on a Panhead. They don't even come close to making one of this quality, nowadays.
Jack
Post by Jim on Sept 1, 2004, 2:42pm
Cotten, Thanks, me thinks you hit the nail on the head... Your remark about the bowls purging themselves, seems to be exactly what my baby is doing. Do I just replace the thru the tank shut-off, the float needle, or both? What did you do to fix problem? Also, Why do you think that both my Pan tanks are fitted with the short ramp gas bungs??? Both tanks require vented caps... My shovelhead only has short ramp bung on the rightside tank. The left side has a long ramp bung and uses a ventless cap. Thanks for your insight...
Post by Jim on Sept 1, 2004, 2:48pm
Andrew, I agree with you about the Linkert... Have a buddy who runs a S&S on his Pan... Not happening here... Jim
Post by Cotten on Sept 1, 2004, 8:58pm
Jim!
The petcock is your immediate concern. Unfortunately just throwing new parts at it might not do much good.
Try to observe if there is some misalignment of the petcock seat by viewing through it at the top fitting hole. Perhaps you can persuade it straighter.
Inspect for any gouges or problems with the rods' bevel, and grind it in a valve grinder if necessary. Grunt it in tight once or twice with a pair of pliers, and see if it helped.
Beware of soft-tipped petcocks.
All of my Pans and Knucks have interchangeing gas caps. Even my 65's, as they have 3.5 tanks.
Good luck,
Post by Jim on Sept 1, 2004, 11:29pm
Cotten, Been out twice today on the pan... Each time, I shut gas off before shutting engine down... Let bike run, with gas turned off, until she started to run out her fuel supply... This approach seemed to help... Atleast, 'til I can further investigate your advice... Thanks again! On the gas cap issue, I guess I will be making a ventless cap from a vented cap to use on the left tank... Using a vented cap on the left side tank and bike being put to rest on the kickstand with a full supply of fuel, allows gas to escape tank and run all over her left side... Do not need any more gas leakage !!!
Post by 57FLH on Sept 2, 2004, 9:10pm
...I too have experienced the same with my M74B & Thanks Cotten!...you have solved my problem as well.
I rebuilt my linkert but it's been flooding & leaking out if it sits for awhile even if the petcocks shut. I assumed that it was a float adjustment error (residual gas in the bowl after shut down), but now that I've read your posts it hits home & now I'll start looking at the petcock instead of pulling the carb...........
Post by 65panrydr on Oct 5, 2004, 5:42pm
My dad rode a 32 flat and a 65 chop he always run bike after shuttin petcock just was easier to him I guess.
