What does a breather tube do on small engine?
The breather tube includes a reed that collects oil that lubricates the piston, and the breather tube directs the collected oil back to the crankcase. The breather tube usually has fibers that filter and cool air, preventing the engine from overheating and improving its performance.
What does a crankcase breather tube do?
A crankcase ventilation system removes unwanted gases from the crankcase of an internal combustion engine. The system usually consists of a tube, a one-way valve and a vacuum source (such as the intake manifold).
How does the breather tube work on a lawn mower?
Engine Operation. In those that do, the breather tube directs exhaust gases out of the combustion chamber and into a positive crankcase ventilation valve. From there, the gases blow into the air. The breather tube includes a reed that collects oil that lubricates the piston, and the breather tube directs the collected oil back to the crankcase.
How does a small engine crankcase breather work?
It works by allowing high pressure to escape the engine crankcase, but close when crankcase pressure is lower than the outside ambient air pressure. This has the overall effect of a crankcase pressure that is lower than the outside air pressure.
Where can I find parts for my Honda lawn mower?
Honda’s online Parts Catalog makes it easy to find parts for Honda Generators, Lawn Mowers, Tillers, Trimmers, Pumps, and Snow Blowers. You can print a wish list or even email it to your local Honda dealer. We recommend confirming your parts with your Honda Power Equipment dealer before placing an order.
Why does my lawn mower have black smoke coming out of the breather tube?
Symptoms of Problems. Leaking oil is a sign of a cracked breather tube, but the tube simply may be dirty. If the tube is dirty, the lawnmower engine usually spews bluish smoke from its exhaust pipe. The bluish smoke can be confused with the thick, black smoke emitted by an engine that actually burns oil in its crankcase,…