Tag: hard starting lawn mower

Lawn Mower Repair Tips

My Lawn Mower Is Hard To Start

Lawn mowers can be finicky machines. They can be easy to start one day and hard to start the next. In most cases it is a simple adjustment to make them easier to start.

This adjustment is often a valve adjustment. Over time the valve clearance become loose and will not allow the valves to open properly. If the intake valve does not open fully, a fresh charge of gasoline will not make it into the combustion chamber. If the exhaust valve does not open fully, the hot gasses will not be expelled out the exhaust pipe and it prevents fresh gas from coming into the combustion chamber as well.

An engine is basically an air pump. Air goes in and air goes out. Whenever that cycle is interrupted, it makes it hard to start the engine. Try adjusting those valves to their proper specification and see if it makes a big difference in the starting of that engine.

You should also check to make sure that the choke is working properly. An engine choke is a butterfly type valve and you close in the carburetor. When it is closed, it creates more vacuum inside the carburetor and pulls more fuel through it and into the engine. If the choke is not closing fully, then fuel will not be adequate enough for a cold start operation.

By adjusting the choke and valves, you should have an easier starting lawn mower.

Lawn Mower Repair Tips, Push and Self-Propelled Lawn Mower Repair

Troy-Bilt Self Propelled Lawn Mower Takes Many Pulls to Start

Are you pulling and pulling and then FINALLY your lawn mower decides it wants to start?

This is a pretty common problem with a Troy-Bilt lawn mower with a Briggs and Stratton Overhead valve engine. After a while the valve lash will become tight and not allow the valves to open far enough to let fuel in and exhaust out. If not enough fuel comes into the combustion chamber, then it will not ignite and burn properly.

If you are mechanical by nature, remove the valve cover and set the engine at Top Dead Center and check the valve clearance. One these small engines, the intake is set at .004 and the exhaust at .006 to have them run at their best performance.

Adjust the valves if they are not in specifications and reinstall the valve cover with some Triple Bond sealant. Let it dry for a few hours before you test run the engine to see if you have solved the problem.

If after your repair it still is hard to start, check the fuel and choke system to be sure that they are working as they should.

If you need a Troy-Bilt small engine mechanic to help with your lawn mower, visit our Locationspage to find a shop near you.

Lawn Mower Repair Tips

How to Start a Hard Starting Lawn Mower

You are struggling to start your lawn mower and you just feel like pushing it over the nearest hill…well that is, if you have a hill!

Lawn mowers can be a real pain if everything is not working properly and a hard starting one can be frustrating. So, let’s see if we can take some of that frustration out of it for you.

A hard starting lawn mower can either have a fuel issue, ignition or a mechanical one.

Fuel

You can check if the lawn mower is getting fuel by trying to start the engine and then removing the spark plug after you stop cranking. See if there is any gas on the plug. If not, it could be a fuel delivery problem such as a plugged up carburetor or fuel filter.

Ignition

You can also install a spark tester at this time to see if you have good spark.

Mechanical

A choke that will not fully close is another issue that causes hard starting. Engage the choke fully and make sure that is closes completely.

Improperly adjusted valves is another item that will cause hard starting. Check the valve clearances to ensure they are in specifications.

Low engine compression can also cause this problem.  Check for the proper PSI that your engine should have.

These are some simple things that you can check and see if you can resolve your lawn mower problem. Perform these steps and hopefully you will find the problem!