Table of Contents
How do you adjust a Nikki carburetor?
- Remove the housing covering the air filter.
- Turn the idle mixture screw clockwise one and a half turns with a Flathead screwdriver.
- Turn the main jet adjustment screw counterclockwise one and one half turns with a Flathead screwdriver.
- Insert the air filter cartridge in the location from which is was removed.
What causes a carburetor to surge?
A dirty or gummed up carburetor causes an engine to surge. If you feel comfortable working on carburetors, unbolt the bowl and clean it thoroughly. Check whether the float moves up and down without sticking, and clean the tiny ports on the bowl hold-down bolt.
Why is my mower revving up and down?
If the air that the engine requires to run is blocked, especially sporadically, it can cause the engine to slow down. When the blockage moves or clears, the engine may suddenly rev up in response. To fix this type of problem, check the air filter to ensure that it’s not clogged with dirt and debris.
Who makes Nikki carburetor?
Established Changzhou Guangri Precision Machinery Co., Ltd. in China. Changed the name of the company to Nikki Co., Ltd. Obtained ISO 14001 certification.
What causes idling to go up and down?
If an engine is not getting enough fuel (this is called “running lean”), due to fuel pressure (regulated by the fuel pump and regulator), restricted fuel injectors, a vacuum leak or really anything that throws off the fuel mixture going in to the engine, this can cause the surge.
Why does my RPM jump when idle?
Worn out or fouled spark plugs can cause rpm fluctuations. Check the engine vacuum and make sure there are no leaks. Leaks in the engine vacuum can cause rpm fluctuations. Replace the fuel filter if it is clogged or dirty.
What is the best fuel to air ratio?
If the ratio is too rich or too lean, the engine will not burn optimally burn the air-fuel mixture which can cause performance issues or use up too much fuel. The ideal air-fuel ratio that burns all fuel without excess air is 14.7:1. This is referred to as the “stoichiometric” mixture.