Three substitution things tin happen: a bad fuel mix, lack of compression or lack of spark. Beyond that, thousands of child things tin create problems, but these are the "big three." Based on the unproblematic engine nosotros cause got been discussing, hither is a quick rundown on how these problems deport on your engine:
Bad fuel mix - Influenza A virus subtype H5N1 bad fuel mix tin occur inward several ways:
· The air intake powerfulness endure clogged, in addition to hence at that spot is fuel but non plenty air.
· The fuel organization powerfulness endure supplying besides much or besides piffling fuel to the mix, pregnant that combustion does non occur properly.
· There powerfulness endure an impurity inward the fuel (like H2O inward your gas tank) that makes the fuel non burn.
Lack of compression - If the accuse of air in addition to fuel cannot endure compressed properly, the combustion procedure volition non function similar it should. Lack of compression powerfulness occur for these reasons:
· Your piston rings are worn (allowing air/fuel to leak by the piston during compression).
· The intake or exhaust valves are non sealing properly, over again allowing a leak during compression.
· There is a hole inward the cylinder.
The close mutual "hole" inward a cylinder occurs where the exceed of the cylinder (holding the valves in addition to spark plug in addition to also known as the cylinder head) attaches to the cylinder itself. Generally, the cylinder in addition to the cylinder caput bolt together amongst a thin gasket pressed betwixt them to ensure a practiced seal. If the gasket breaks down, pocket-size holes railroad train betwixt the cylinder in addition to the cylinder head, in addition to these holes crusade leaks.
Lack of spark - The spark powerfulness endure nonexistent or weak for a pose out of reasons:
· If your spark plug or the wire leading to it is worn out, the spark volition endure weak.
· If the wire is cutting or missing, or if the organization that sends a spark downwards the wire is non working properly, at that spot volition endure no spark.
· If the spark occurs either besides early on or besides slowly inward the bike (i.e. if the ignition timing is off), the fuel volition non ignite at the correct time, in addition to this tin crusade all sorts of problems.
Many other things tin become wrong. For example:
· If the bearings that let the crankshaft to plough freely are worn out, the crankshaft cannot plough in addition to hence the engine cannot run.
· If the valves do non opened upwardly in addition to closed at the correct fourth dimension or at all, air cannot become far in addition to exhaust cannot larn out, in addition to hence the engine cannot run.
· If mortal sticks a murphy upwardly your tailpipe, exhaust cannot snuff it the cylinder in addition to hence the engine volition non run.
· If you lot run out of oil, the piston cannot motion upwardly in addition to downwards freely inward the cylinder, in addition to the engine volition seize.
In a properly running engine, all of these factors are inside tolerance.