The fuel tube can scrape against the air cleaner housing and develop holes, posing a fire hazard.
The vehicles are model year 2012 Kawasaki four-wheeled, off-highway utility vehicles with side-by-side seating for two people and automobile style controls.
Each model has a bench seat, a rollover protection structure and a cargo bed.
The vehicles are available in the colors green, red, black and camouflage.
This recall involves the Mule 600, 610 4x4, and the Mule 610 4x4 XC.
They were sold at Kawasaki dealers nationwide from June 2011 to February 2012 for between $6,700 and $8,200.
Consumers should immediately stop using these vehicles and contact their Kawasaki dealer to schedule a free inspection and repair.
For more information, contact Kawasaki between 8 a.m. and 5 p.m. PT Monday through Friday toll-free at (866) 802-9381 or visit the firm's website at www.kawasaki.com