If you own a lawnmower, you might occasionally run into engine issues, especially if you’ve been using it for a while. One of the most frequent problems is when the engine repeatedly revs up and down, which makes mowing the lawn challenging. A number of things, such as a clogged air filter, a broken carburetor, or an improperly set governor, might contribute to this issue.
The governor is a mechanical device used to regulate engine speed. The engine can oscillate when it isn’t working properly, giving the operator a bumpy ride. Open the engine cover and look for the governor arm to access the governor on a Briggs and Stratton engine. Then, until the engine runs smoothly, unscrew the nut holding the arm in place and move it in either direction. To hold the arm in place, tighten the nut one last time.
It can be difficult to start a cold engine, especially if it hasn’t been used for a while. Checking the fuel level and adding additional petrol as needed is the first step. The spark plug should then be examined and replaced if it is unclean or damaged. To start the engine, pull the starter cord multiple times.
Use starting fluid if necessary if the engine still won’t turn over. However, it’s crucial to remember that starting fluid should only be used as a last resort because if used excessively, it can harm the engine. Remove the air filter cover and spray a tiny amount of starting fluid directly into the carburetor to use it. After that, try starting the car again.
You might need to take your lawnmower to a professional for repairs if none of these fixes work. A small engine mechanic can identify the issue and carry out any required fixes to get your lawnmower back up and running.
In conclusion, various things, such as a dirty air filter, a broken carburetor, or an improperly calibrated governor, might cause a lawnmower engine to rev up and down. A Briggs & Stratton engine’s governor can be adjusted by loosening the nut holding the governor arm in place and moving it in either direction until the engine runs smoothly. It takes numerous pulls of the starter cord and inspection of the spark plug and gasoline level to start a cold engine. Starting fluid can be applied as a final option if necessary. It might be time to take your lawnmower to a professional for repairs if none of these fixes work.
Flooding a tiny engine causes the spark plug to become moist with extra fuel, which makes it challenging to start the engine. This may result in the engine sputtering, stalling, or not starting at all. Additionally, too much fuel can wash away the oil coating the cylinder walls, accelerating engine wear and increasing the need for expensive repairs.