Cold start: gasoline comin' out of exhaust pipe
Thread Starter
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Intermediate
Joined: May 2019
Posts: 43
Likes: 8
From: Montreal
Cold start: gasoline comin' out of exhaust pipe
Hi buddies,
I drove my motorcycle all day yesterday without any problem. Las nigjt I parked the bike in the street for the first time. ( don't worry I have two disc locks).
This morning when I tried to start tje bike, gasoline was comin out of the pipes. Never happened before. Just like if gasoline had been flooding the cylinders during the night. I changed the oil and filter, heavily contaminated by fuel and took a ride in the neighbourhood. Checked the oil: fine. No black smoke, everything fine. Has somebody flooded the carb by turning again and again the throttle or is there a mechanical problem I can't figure out ?
Last year I have adjusted the float and replaced the needle. This year I replaced the carb vacuum hose to the petcock. It is very strange that such a problem occurs suddenly and disappears magically !
What do you think ?
I drove my motorcycle all day yesterday without any problem. Las nigjt I parked the bike in the street for the first time. ( don't worry I have two disc locks).
This morning when I tried to start tje bike, gasoline was comin out of the pipes. Never happened before. Just like if gasoline had been flooding the cylinders during the night. I changed the oil and filter, heavily contaminated by fuel and took a ride in the neighbourhood. Checked the oil: fine. No black smoke, everything fine. Has somebody flooded the carb by turning again and again the throttle or is there a mechanical problem I can't figure out ?
Last year I have adjusted the float and replaced the needle. This year I replaced the carb vacuum hose to the petcock. It is very strange that such a problem occurs suddenly and disappears magically !
What do you think ?
Road Warrior
Joined: Mar 2014
Posts: 1,623
Likes: 698
From: nowhere
Float probably got stuck or had a speck of dirt in the seat. Change your fuel filter, replace the petcock with a manual one (Pingle) and plug the vacuum line. Remember to turn it off when you park it. Vacuum petcocks are problematic by nature and prone to failure. **** can it and your problem will go away.
Seasoned HDF Member
Joined: Aug 2011
Posts: 11,814
Likes: 5,120
From: SW Ohio
Joe40x is right on target with what I'd say regarding the source of the problem. I'll add this, if it was indeed the problem, I'd repair it and change the oil asap without running it further.
Thread Starter
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Intermediate
Joined: May 2019
Posts: 43
Likes: 8
From: Montreal
Manual petcock
My ride is a carbed 2002 Dyna sper glide FXD.
Are manual petcocks available from HD dealers or only at aftermarket dealers like JP cycle ?
Where do you guys buy your aftermarket parts ?
Sorry for asking that many questions, I'm learning to know and fix my motorcycle properly. It is my first HD. Always drove Triumph and jap before, thnx.
Jack
Are manual petcocks available from HD dealers or only at aftermarket dealers like JP cycle ?
Where do you guys buy your aftermarket parts ?
Sorry for asking that many questions, I'm learning to know and fix my motorcycle properly. It is my first HD. Always drove Triumph and jap before, thnx.
Jack
Supporter
Joined: Jan 2007
Posts: 15,787
Likes: 5,615
From: along the shore of Mishigami
The accelerator pump squirts fuel into the throat of the carb and that extra fuel will eventually dribble down into the cylinders. If you have the stock petcock on the bike they are opened by vacuum from the carb. Must have had curious hands revving the engine for you during the night. This won't happen on fuel injection bikes.
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Thread Starter
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Intermediate
Joined: May 2019
Posts: 43
Likes: 8
From: Montreal
New petcock
Found a brand new petcock (no vacuum) for 29$ can. Already installed. The old one had its threads damaged and prob the diaphragm as well. I gotta change oil and filter for the second time cause contaminated once again. B4 re starting the bike I ll open up the carb looking for debris and making sure the needle operates properly. That will be tomorrow.
Thnx for assistance.
Jack
Thnx for assistance.
Jack
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Thread Starter
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Intermediate
Joined: May 2019
Posts: 43
Likes: 8
From: Montreal
Love my new pet.......****
Hi folks,
Replaced old petcock, , plugged the vacuum on carb,
Opened carb bottom end and inspected float and needle, gave a shot of carb cleaner to the jets, installed a fuel line Fram universal filter at the outlet pf the new petcock, chamged oil and filter.
Test ok. Runs great.
Waiting for new issue !
Thnx.
Jack
Replaced old petcock, , plugged the vacuum on carb,
Opened carb bottom end and inspected float and needle, gave a shot of carb cleaner to the jets, installed a fuel line Fram universal filter at the outlet pf the new petcock, chamged oil and filter.
Test ok. Runs great.
Waiting for new issue !
Thnx.
Jack
Road Master
Joined: Aug 2008
Posts: 1,246
Likes: 251
From: Belle River Ontario
Your from Montreal you should know that even with 2 disc locks your bike will disappear if you leave it out in plain sight for to long...
lots of places in in that area for Harley’s....seems like QC is a bike mecha so you should not have any problems finding help if you need it....lots of places to buy from as well, lots of independent shops. Start here...buy this mag and look at the adds...all from your province....
http://www.revolutionmotorcyclemag.com/
lots of places in in that area for Harley’s....seems like QC is a bike mecha so you should not have any problems finding help if you need it....lots of places to buy from as well, lots of independent shops. Start here...buy this mag and look at the adds...all from your province....
http://www.revolutionmotorcyclemag.com/