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Old 05-18-2007, 03:19 AM   #1
Darik OP
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Joined: May 2007
Oddometer: 2
Fuel flooding thru drainage tube, BMW F650 Funduro (1995)

Hi folks,

A friend of mine suggested I seek advice here regarding a strange problem with my F650 (non GS, 1995).

The below occured the other day. Haven't had time to look further into it, but will do so this weekend. Dont know if it matters, but bike has been in winter hibernation, took it out a few weeks ago, at which point it did run without any problems. Fuel valve has been shut off (and carburator run empty) during winter. Engine regularly run during hibernation. Before below problem, fuel valve was left on "on", as I normally do during riding season, since it's an "automatic" fuel valve.

Symptom
Large amounts of fuel running out of the drainage tube close to the stand. I guess this tube drains the airfilter house. Engine not starting.

As I came to the bike, there was already some signs of fuel on the ground. When moving the bike, it was literally flowing out.


Amateur analysis
Something wrong with the fuel valve :-P

Fuel valve is now turned off, I will do a trial this weekend and turn it on to see if problem persists, but would be good to have some ideas on how to fix it if it indeed does.
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Old 05-18-2007, 04:33 AM   #2
Doghouse_Riley
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My guess: float stuck open. Unless it's FI, then I don't know.
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Old 05-18-2007, 05:38 AM   #3
SScratch
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Go to F650.com and look in the FAQ section. Do a search on "Puking Petrol". It should clear everything up for you.
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Old 05-18-2007, 05:57 AM   #4
Darik OP
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Quote:
Originally Posted by SScratch
Go to F650.com and look in the FAQ section. Do a search on "Puking Petrol". It should clear everything up for you.
Quite a well describing title :-)

Guess it's not the fuel valve, but the carb float, sigh.... Tad easier to work with the fuel valve than the carburators - time to get the guide book out!


Thanks Doghouse_R and SScratch
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Old 05-18-2007, 06:02 AM   #5
Mtncrzr
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Laugh Easy trick to try

Run some gas cleaner through the tank and bang on the carbs with a rubber mallet. YMMV
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Old 06-13-2007, 04:00 AM   #6
OldBarKeep
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Location: Thornton, New Hampshire
Oddometer: 195
chech t "O" Rings

Before ordering new floats, Check the o-rings that hold the valve in place for the needle valve. Mine were loose and fuel was passing by them causing a stuck float seeming situation. The not needed floats were $76, the o-rings $.50.
Good Luck
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