Kawasaki H 721V surging at idle

MStanfield said:

I have a 2005 Ferris 1500 with Kawasaki FH 721 V with about 425 hours.

The govenor is "loping/hunting" at idle; runs fine under load at operating RPM. To date I have:
Replaced fuel filter. Good fuel flow at discharge side of fuel pump
Adjusted valves
Removed fuel cap with no results to check for vaccum lock
New coils (corrected a low power issue) and plugs
Removed air filter to check for flow....no change
Took carb apart; ran fishing line thru passages. All seemed clear when carb cleaner was used
Sometimes unit smells rich
Is somewhat corrected if choke is applied...leads me to believe fuel problem
I haven't tried to adjust governor yet....not sure how on the Kawasaki

What am I missing?

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bertsmobile1 said:

Surging is usually lack of fuel.
Surging at low idle is usually a blocked idle circuit in the carb.
Take the carb apart and give it a good clean ( carb cleaner soaker overnight ultrasound )
Before you do that check for leaks by spraying around the carb and in particular the manifold with WD 40 or similar FROM A TRIGGER PACK.
Any change in the engine running will indicate a fuel leak.
Badly worn valve can also create a similar problem at low speed but vanishes at higher speeds.

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MStanfield said:

Thanks Berts Mobile. I've looked and looked but can't find a schematic or details that would show "which" passage is the idle circuit? Is there a jet to remove? I'll also try the WD 40 to check for leak

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