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How to Identify and Fix Common Gardening Problems ?

We provide a variety of viewpoints on how to identify and fix common gardening problems. Our sources include academic articles, blog posts, and personal essays from experienced gardeners :

A plume of white smoke is generally most noticeable at diesel startup, particularly when it`s cold. This is due to the fact that colder air, which is more dense than warm air, lowers temperatures in engine cylinders at the end of the compression stroke.
The white smoke is the engine burning off all the excess oil. The fix – drain the excessive oil, and idle the engine until the smoke clears. This may take 5 minutes or so. Too much oil will cause other problems, smoke, poor running, no running, leaks, engine damage.
White smoke always means unburned fuel. The compression doesn`t get the fuel hot enough to burn completely when the engine is cold. However, this should not happen at operating temperature.
It is usually a sign of inadequate and unfinished incomplete combustion of the diesel fuel. There are many potential causes for this, including dirty or worn fuel injectors, a faulty turbocharger, worn or sticking piston rings, a dirty air filter or the engine could be operating at a below average temperature.
As a general rule, some smoke upon initial startup for a few moments is common, Urso notes. “Black smoke is traditionally associated with a rich combustion process or an overload (abnormal mechanical resistance),” he continues. “White smoke (contingent on its odor) signifies insufficient temperature.
White or Gray Smoke from Exhaust – Just like if you see white smoke from under the hood, persistent white smoke usually indicates a coolant leak. If there`s only a little bit, it`s probably condensation. Blue Smoke from Exhaust – If you see blue or dark gray smoke, that`s an indication of burning oil.
A perforation to your gasket or a blown head gasket usually occurs as a result of an overheated engine. When coolant flows into the combustion chamber from a blown head gasket it burns/evaporates into white smoke.
Overfilled oil reservoir: Too much oil in the reservoir can also cause a lawn mower to smoke. The lubrication systems in most mowers are not well sealed, and usually there`s an overflow oil reservoir with a relief outlet where excess oil can leak.
Spark Plug Issues

Examining the spark plug regularly is essential because a dirty one can cause various problems, and smoking is one of them. If the spark plug is dirty or too old, or if the plug`s gap is too large, it won`t start the mower and will sputter black smoke.

But white smoke usually is caused by vaporized coolant, which often is the result of a blown head gasket. At the middle of the engine, you have the cylinders, which combust gasoline and air. All around those cylinders are passages for coolant, to keep the cylinders from overheating.
Most common causes of black smoke are faulty injectors, a faulty injector pump, a bad air filter (causing not enough oxygen to be supplied), a bad EGR valve (causing the valves to clog) or even a bad turbocharger.
Blowing white smoke is a red flag for your diesel engine, yet we see this happen all the time to our customers. In many cases, white smoke emanating from the tailpipe (often at idle once the engine reached operating temperature) typically means a worn out injector.
Smoke After Warm Up

Oil can enter the combustion chamber past the valve stem seals or pistons rings, so if this symptom persists then one of these components may be compromised. White smoke exiting the exhaust pipe after the engine has warmed is a sign that coolant is burning in the combustion chamber.

White smoke usually means coolant is getting into the combustion chambers of your vehicle. This generally happens because of a cracked or leaking head gasket, which allows coolant to seep into your cylinders. In extreme cases, you will need to replace your head gasket.

Discover Relevant Questions and Answers for Your Specific Issue

the most relevant questions and answers related to your specific issue

My 23 hp Kawasaki engine runs until it get warm, it will then stall and is hard to start after that. It seems to me as if something is cutting the fuel off, What could it be?
ANSWER : When it begins to stall, loosen the gas cap. If performance improves, clear the gas cap vent holes.

Gary

Is detergent oil or non detergent oil better for kawasaki pa5401a motor
ANSWER : Use a good quality 10w40 oil

The oil pressure light comes on when i idle down the engine and one time it shut down and would not start back i let it sit for several hours and it started back and is running fine but the oil light still comes on when i idle it down
ANSWER : So, tell me have you checked your oil level? that would be the first thing to do then check your oil pressure switch and /connections

Not getting fuel
ANSWER : Take it apart and clean the jets

Engine spins but no fire to spark plugs – kawasaki Fh641v 21hp 21 Hp Riding Lawn Mower Engine ()
ANSWER : What is this engine mounted on? If it’s on a riding mower, you could have a problem in the interlock wiring that is “killing” the ignition. You can narrow down your search by disconnecting the ground wire that hooks to the ignition coil(s) and see if you have spark after that. If you have spark, then plug the wire back up and see if you lose it again. If you do lose it then you need to start troubleshooting the interlock circuit on the equipment. If you do not have fire with the ignition ground wire disconnected you then need to start looking at the engine ignition system. Hope this gets you in the right direction.

Blue smoke on startup
ANSWER : Just left over fuel in cyl. Its ok.

Won’t start While using the blower last week it stopped. Afterwards would not start. The unit did not smoke during operation or when it was stopping the last time. Replaced spark plug, took off carb, cleaned and put back together. Still no start… Tried a little starting fluid. Sputtered a little, like 2 sec and then stopped..
ANSWER : This engine may well have seized, remove the muffler and check the condition of the piston skirt through the open exhaust port, any signs of scuffing and the machine will have to come apart to assess the damage.

How do i adj the valves on a 23hp kawasaki ? – kawasaki Fh680vgs24 23hp 23 Hp Lawn Mower Engine Motor ()
ANSWER : You need to remove the rocker arm cover. Then most engines have a set screw and a locking nut that hold the valve rocker arm on. Loosen the locking nut and with a feeler gage make whatever adjustment you need (tighten or loosen) then holding the adjusting screw from turning, tighten the lock nut. It is not very hard to do and remember that they are all metric fasteners.