Here are some recommendations.
If this is a new unit then we would would suggest a service centre look at the unit and resolve under possible warranty.
If it is an older model it could be due to fuel issues.
Stale fuel is the number one cause of hard starting in small engines. Today’s fuels break down rapidly, decreasing their ability to ignite. The days of filling large containers of fuel and expecting them to last for several weeks (unless treated with fuel stabilizer) are long gone.
IMPORTANT: Whenever possible, avoid using fuels containing alcohol-based additives. Use of fuel that contains more than 10% ethanol, such as E15 (15% alcohol), is NOT recommended. If you choose to use fuel with an alcohol content that exceeds approved usage levels, you do so completely at your own risk.
1. Keep your fuel fresh. A variety of Sta-Bil® brand fuel additives are available from our company. Properly mixed in the correct proportion to the gasoline, these products will maintain the chemical stability of your fuel for up to 12 months.
NOTE: If you choose not to use a fuel stabilizer, drain the fuel from equipment that you do not use regularly. Small engines that will be stored for longer than 30 days should be COMPLETELY drained of fuel before storage. This includes any fuel in the fuel tank, the fuel lines and carburetion system. Products that are only used intermittently and spend a large amount of their life in storage between uses (such as snow throwers, chain saws, garden tillers, log splitters etc...) are especially prone to stale-fuel problems.
Why this is important: When the fuel ages the residue left behind is sticky and similar in composition to varnish. Left to dry, this residue can clog the fuel ports on carburetors and fuel delivery systems.
Don't forget the fuel in the float bowl: Most small engines - unlike automobiles and fuel-injected engines - don't have fuel pumps. They have gravity flow systems and fuel bowls in the carburetor to store small amounts of fuel to feed the engine if the unit happens to be tilted. It is important that the fuel in these carburetor float bowls be removed when preparing a unit for storage. ( Each engine and product is different; please contact the engine manufacturer if you need instructions on how to do this.)
Be sure to properly dispose of used oils and fuels, in accordance with your local regulations.
2. Keep your fuel clean.
Here are some easy ways to keep dirt from getting into your fuel:
• Clean debris from around the engine's fuel cap before removing it.
• Avoid leaving fuel containers and fuel tanks open, unless absolutely necessary. Leaving them open could allow airborne contaminants into the fuel, hastens the evaporation of volatile fuel components, and may even create a fire hazard.
• Don't leave fuel container lids and fuel tank caps lying in dirty areas.
• Install in-line fuel filters, where applicable, and change them regularly to help prevent any contaminants that do get inside the fuel system from reaching the carburetor. Fuel filters are available from most engine manufacturers and engine service dealers.
• Clean or change engine air filters regularly to prevent contaminants from entering the fuel system via the air intake.
Date published: 2018-08-16