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Curtis B.
Curtis B., Technician
Category: Small Engine
Satisfied Customers: 13581
Experience:  have worked on and around most engine models for 35 yrs./Polaris ATV expert
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Have a 2015 Z435 with 25hp /S. Bought it 2 weeks ago and now

Customer Question

Have a 2015 Z435 with 25hp B/S. Bought it 2 weeks ago and now the carb seems as though it's sticking. Runs but it idles up and down while running. Any ideas?
Submitted: 1 year ago.
Category: Small Engine
Expert:  Curtis B. replied 1 year ago.
With the Briggs twin, I would run a cylinder balance test. Loosen the spark plug wires,and with engine idling, remove one wire at a time, if engine dies when either spark plug wire is removed, the opposite cylinder is not firing. If one cylinder is not firing, the engine will not run steady speed.