Just general information not specific to any brand...
Have you changed the plug? Do it just to say you did, fought the same problem on a Kawasaki lawn mower. $200 worth of parts and much frustration later ended when I replaced a perfectly good looking plug!
Exhaust backfire is usually a sign of weak or intermittent ignition.
Intake sneezing is usually lean mixture or retarded ignition timing.
When adjusting mixture be sure the air cleaner is in place, any baffling or cleaner box is in place and completely assembled. Learned that one the hard way too!
New carbs are often adjusted too lean. If it is a slide carb, try raising the needle. If fixed jet, compare the original carb jet size.
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Today's Featured Article - Tractor Hydraulics - The Basics - by Curtis Von Fange. Hydraulics was one of the greatest inventions for helping man compound the work he can do. It’s amazing how a little floor jack can lift tons and tons of weight with just the flick of a handle. What’s even more amazing is that all the principals of hydraulic theory can be wrapped up in such a small package. This same package applies to any hydraulic system from the largest bulldozer to the oldest and smallest tractor. This short series will take a look at the basic layout of a simple hydraul
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