Flooding out at Idle - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 5 (permalink) Old 06-04-2009, 09:24 PM Thread Starter
Job
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Flooding out at Idle

Hey guys,

My 1985 VN 750 (86 engine) is flooding out at idle. It is blowing black smoke but runs fine at 5k rpm. It leaked a big pile of gas all over the garage and the fuel is not shutting off when the engine is off.

Any thoughts?
JOB
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post #2 of 5 (permalink) Old 06-04-2009, 10:18 PM
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Sound like stuck float valve, is your petcock set to PRI or On?


85 VN700 "Old Yella"

REBUILT ENGINE
CUSTOM PAINT
VANCE & HINES CRUZERS
EAR SHAVED AND RE-JETTED W/K&N'S
DUNLOP ELITE K591 FRONT & REAR
VOLTMETER
SYNTHETIC BRAKE FLUID
SYNTHETIC OIL & GEAR LUBE
PLEXISTAR 2 WINDSHIELD
SPLINES LUBED
ACCT'S GREASED W/TOC SPRINGS
COASTERD
LEATHER SADDLE BAGS
LEATHER TOOL AND ROLL BAG
PICKUP COILS GAPPED AT .018"
NGK CAP, WIRES, IRIDUMS
BARNETT FRICTION PLATES & SPRINGS
CUSTOM GRIPS, MIRRORS, LEVERS
ORIGINAL STATOR & R/R 14.5v
DEKA MF AGM ETX15L

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Last edited by lance328; 06-05-2009 at 05:29 AM.
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post #3 of 5 (permalink) Old 06-05-2009, 05:35 AM
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Petcock Seal
Could it be that his petcock seal and oring is old, worn, and shot.
I had this problem, changed them and it fixed the leakage,
found a 18 dollar kit for the two o-rings and seal from a canadian company,
if you think that this might help, let me know, and i'll go threw my visa bill to find the company's name and website.
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post #4 of 5 (permalink) Old 06-05-2009, 05:51 AM
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It could be the petcock, but if he has the petcock set on "PRI" it bypasses the shutoff. If he has a stuck float valve it will drain the tank down to the reserve level.

If the petcock o-ring has gone bad and a piece made it to the float valve the result would be the same.


85 VN700 "Old Yella"

REBUILT ENGINE
CUSTOM PAINT
VANCE & HINES CRUZERS
EAR SHAVED AND RE-JETTED W/K&N'S
DUNLOP ELITE K591 FRONT & REAR
VOLTMETER
SYNTHETIC BRAKE FLUID
SYNTHETIC OIL & GEAR LUBE
PLEXISTAR 2 WINDSHIELD
SPLINES LUBED
ACCT'S GREASED W/TOC SPRINGS
COASTERD
LEATHER SADDLE BAGS
LEATHER TOOL AND ROLL BAG
PICKUP COILS GAPPED AT .018"
NGK CAP, WIRES, IRIDUMS
BARNETT FRICTION PLATES & SPRINGS
CUSTOM GRIPS, MIRRORS, LEVERS
ORIGINAL STATOR & R/R 14.5v
DEKA MF AGM ETX15L

Best Auto/Moto Insurance | Motorcycle Protection Today | FREE Trade-In Quote
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post #5 of 5 (permalink) Old 06-05-2009, 10:29 PM Thread Starter
Job
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The petcock is in the on position. So it is a stuck float, any thoughts on how to unstick it and keep it that way?
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