Some lawn mowers use liquid engine coolant to keep the engine from overheating, much in the same way as a car. For these mowers, check the engine coolant before each use and refill as necessary. Engines also require lubrication from oil to prevent overheating.
How do lawn mower engines stay cool?
To keep cool air around the cooling fins, the flywheel has fins that act as a radial fan. When the lawn mower engine is running, these fans bring air in from the shroud and push it around the engine to remove heat.
Why does my lawn mower overheat and shut down?
Low engine oil can cause some real damage to a lawn mower as it runs. … Blocked cooling fins may be one of the more common causes of overheating in mowers specifically, since all the grass and debris from lawns or fields can easily end up in the cooling fins, keeping air from circulating and cooling the engine down.
Why does my lawnmower not overheat?
In plenty of cases, lawn mowers will start overheating as a result of blocked cooling fins. If the cooling fins are blocked, air circulation is going to be blocked. … In that case, making sure that lawn mowers have enough coolant and engine oil can start to make things better, preventing these problems with overheating.
What causes a lawn mower coil to go bad?
The leading cause of premature failure of an ignition coil is due to a worn or bad spark plug ignition cable. A bad spark plug ignition cable will have a much higher than normal resistance. This high resistance causes a very high amount of voltage to be generated from your ignition coil’s secondary winding.
What could cause a lawn mower not to start?
Your Mower Won’t Start:
Other possible causes include: Loose, Dirty or Disconnected Spark Plug in Your Lawn Mower: Check it out, clean off debris, re-connect and tighten. Dirty Air Filter: Clean or replace. Fuel Not Reaching the Engine: Tap the side of the carburetor to help the flow of gas.
Why does my lawnmower run for 10 minutes then dies?
Most lawnmowers have a vented gas cap. The vent is a check valve that allows air into the fuel tank but keeps gas fumes inside. … After about 10 or 15 minutes, the vacuum will become strong enough that fuel will stop flowing to the carburetor and the lawnmower will die.
Why does my lawn mower shut off while mowing?
Being Overworked. One of the most common reasons that a lawn mower might stall while it is cutting grass is that it is being overworked. This is a mechanism that is intentionally incorporated into the mower to prevent the motor from being blown.
How do I know if my lawn mower engine is blown?
Blown Engine Symptoms & How to Tell if Your Engine is Blown
White Exhaust. Rattling or Knocking in the Engine. Coolant in the Engine Oil. Engine Won’t Start.
Why is my muffler glowing red hot?
The reason the muffler is glowing red is because the exhaust temperature is off the chart. This (highly likely) means that the ignition timing is out, or the fuel mixture is too lean.
What oil is best for small engines?
SAE 30– Warmer temperatures, most common oil for small engines. SAE 10W-30- Varying temperature range, this grade of oil improves cold-weather starting, but may increase oil consumption. Synthetic SAE 5W-30- Best protection at all temperatures as well as improved starting with less oil consumption.