FLH gas cap
Thread Starter
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Stellar HDF Member
Joined: Apr 2009
Posts: 3,039
Likes: 11
From: Northern Ontario
leaking carb
Yesterday I swapped out the float needle with the one from my old carb ( old carb had a fresh rebuild kit in it ) and left fuel on overnite and it still leaked. Now if float is good and float needle is good this pretty much leaves us with the float needle seat correct? Can I dress up the seat hole any with a cone shaped diegrinder stone, I can do this by hand rather than use a die grinder or dremel if necessary ? would this help?
Thread Starter
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Stellar HDF Member
Joined: Apr 2009
Posts: 3,039
Likes: 11
From: Northern Ontario
Ok here's where I'm at I cleaned the seat with some acetone and qutip as when as I buffed it with a materiel attachment on my dremel and didn't make a difernce so decided time to do some measureing of the float. Now I'm not sure if I measured from the right spot but I got .614 where as Dale says he normally set the float level at 0.435 , so is it me in the wrong place or what?
Now in the manual it says 1991 is 0.690- 0.730 inch where as the 1990 has a 3 sided float needle
The manual for 1992-1998 is 0.413-0.453 inch which jives with what Dale says because it is a 4 sided float needle.
The manual shows to measure my type of float from the oposite end of the float to the flange surface where as I measured from the side as shown in the pic.
Now question is am I measureing from the right place and is a bigger number going to give a higher float level or is the lower number going to give the higher float level?
Someone please verify?
Now in the manual it says 1991 is 0.690- 0.730 inch where as the 1990 has a 3 sided float needle
The manual for 1992-1998 is 0.413-0.453 inch which jives with what Dale says because it is a 4 sided float needle.
The manual shows to measure my type of float from the oposite end of the float to the flange surface where as I measured from the side as shown in the pic.
Now question is am I measureing from the right place and is a bigger number going to give a higher float level or is the lower number going to give the higher float level?
Someone please verify?
Road Master
Joined: Jun 2009
Posts: 1,062
Likes: 18
From: Beautiful SW Missouri Ozark Mountain Country
I thought you were supposed to tip the carb so the needle has no pressure from the float on it whatsoever, with the tang just barely touching it, then take your measurement.
You are, however measuring the proper spot.
A higher float level will cause the needle to seat and stop the flow of gas sooner than a lower level.
You are, however measuring the proper spot.
A higher float level will cause the needle to seat and stop the flow of gas sooner than a lower level.
Thread Starter
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Stellar HDF Member
Joined: Apr 2009
Posts: 3,039
Likes: 11
From: Northern Ontario
Yes I should have had it on its side. Question if I'm measuring the float wouldn't it make more scence to measure to where the float needle is being lightly pushed by the float ? Otherwise wouldn't there be play because of the float needle clip being slack and allowing the needle to not block off the fuel 100%?
Thread Starter
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Stellar HDF Member
Joined: Apr 2009
Posts: 3,039
Likes: 11
From: Northern Ontario
Oh so so far nothing is working, it sits for an hour and leaksout the overflow. So I'm going to try something else, I'm going to use the zinear caliper and with carb on its side measure .730 which is manual max recommendation but I'm not going to measure base to edge of float ( tried that and no good ) I'm going to measure to edge of float but with float needle pin half way compressed.
Road Master
Joined: Jun 2009
Posts: 1,062
Likes: 18
From: Beautiful SW Missouri Ozark Mountain Country
One way to test the needle and seat is to hook up the gas line and leave the bowl off. Opperate the float maunally and if the gas flow starts and stops as it shouls, the problem is somewhere else like a bad float, float level or cracked overflow tube.
Thread Starter
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Stellar HDF Member
Joined: Apr 2009
Posts: 3,039
Likes: 11
From: Northern Ontario
When I tried this last time with the zinear caliper set to 730 with float needle end pin half compressed am I actually setting it to a higher float level (more in bowl ) ?
Many articles including the manual mention nothing of setting the float level with the float needle pin compressed so I may be going at it the wrong way here.
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Thread Starter
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Stellar HDF Member
Joined: Apr 2009
Posts: 3,039
Likes: 11
From: Northern Ontario
Had another thought as you mentioned perhaps its something in the float bowl itself and in fact I got off the phone with Dale ( he just called ) and suggested taking the bowl and leaving it sit alone filled with gas. So I'm going to try that and seeing as I have my old carb I'm going to reset the float the way he just told me and put my old bowl on and see what happens.
