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Kawasaki mower engine

The engine is getting too much fuel and running too rick,how do I reduce the fuel mixture? It has a macuni carb.with no screws to adjust mixture

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Likely first step, check that air filter is clean.

Posted on Sep 03, 2008

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New engine Kawasaki 25 hp mower engine has fuel starter engages won't start. I pour gas in carb it starts and run for few seconds what up.

Carb is not feeding gas to motor. Rebuild or replacement is mandated.

If there is a switch on the gas line to the carb it has to be turned on.

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Lawnboy Commercial Mower - idle speed adjustment

did you have the governor arm off of the motor

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I have a Quantum XTE 60 Briggs & Stratton on my lawn mower. It is running too rich as the spark plug is getting very carbonised and the engine is going very slow. How do I adjust the fuel input?

Hi and welcome to FixYa, I am Kelly.
There are 7 different versions of this engine. I need to know which one you have by model number. Model number examples are listed below:




Without that information it is difficult to help you. What I will say is usually a dirty air cleaner makes an engine runs rich. (Too much gas)

However.. speaking in generic terms on must Briggs and Stratton engines there is a single fuel air mixture jet screw on the side of the carburetor body. To reduce the amount of fuel being used you turn the screw clockwise. (screw in) You should not have to turn the screw more than 1/8 turn to get the correct fuel mixture. If you have to turn it more than 1/8 turn first suspect the air filter and last would be a problem with the float level or float needle. I can provide manuals for float needle and float level repairs if you respond with an engine model number.

Thanks for choosing FixYa,

May 19, 2011 | Briggs & Stratton Garden

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Problem model 13an608g129 Starts fine, but once it gets warm or hot the engine dies. Took it in and explained my problem to the repair shop and suggest a carb problem. They replaced the fuel line...

May be the carb needs a rebuild kit....or may be a stuck float or something of that nature...if the mower runs with the filter off then that could indicate a fuel mixture setting is set too rich...with the filter on..the engine would have more suction causing more fuel to be consumed ...thereby choking the engine out...if you know where the fuel mixture screw is, then try this...first turn the screw in all the way until it stops(be gentle, as the needle will be damaged if too much force is used). then turn the screw out 1 & 1/2 turns...this will be a good starting point for setting the carb...while the engine is running(with the filter on) slowly turn the screw ccw until the engine starts to die then turn it cw in till it starts to die...find the "happy medium" and this should solve the problem(assuming the carb does not have to be rebuilt

Apr 25, 2011 | Yard Machines 155 Torque Briggs Stratton...

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My Honda 13.5hp engine has started surging. It seemed to occur after the air filter fell off during mowing for a few seconds. I have tried cleaning the carburator but it still surges. Anything else I can...

Hi sndlys,
When the engine surges (we call it hunting) like that it usually means, the carburetor or the governor need adjustment. You have cleaned the carb. but did you clean or replace the air filter, and did you try to adjust the carb? Since it was running good before I doubt it is the governor. Try to adjust the high speed mixture screw by 1/8 turn at a time and waiting a few seconds to let that adjustment work it's way in the carb. Start by turning the screw out (counterclockwise) a few times. If nothing happens or gets worse turn the screw in (clockwise) a few times, but do not go less than 1 turn out from a lightly seated position. (turned clockwise until lightly seated so no damage is done to the seat or the needle screw) to prevent running in too lean a mixture to prevent overheating and possible engine damage. You could try the low (idle) speed mixture screw adjust a bit, but make sure you remember the position you started from whenever you any adjustment at all. I think if the carburetor is clean and the air filter is clean, also that there is a good fuel flow to the carb. you should be OK. I hope this helps out a bit.Get back to me if you need help. All the best and good luck. Denis.

Mar 02, 2011 | Honda Garden

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Mower running to rich,need to adjust down fuel mixture,when mower is running out of fuel it runs better

Is this on idle, fast speed or both? From what I read adjust the high speed screw clockwise in small increments and see if that is better, what this does is lean the mixture. You don't want too lean a mixture as this could eventually damage the engine, so adjust the needle back and fourth until you get the engine running good. Once it is running just right turn it back 1/8 to 1/4 turn to make sure it is not too lean. If the engine stumbles when going to high speed adjust the low speed needle until the motor goes to high speed without missing, or hesitating. Hope this helps.

Nov 22, 2010 | Briggs & Stratton Garden

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Engine speed surges

Surging engines in lawn mowers are usually related to a lean fuel/air mixture. With today's environmental concerns, the carburetors on these engines are set with a very lean mixture (to reduce air pollution). Furthermore, they usually put limiter caps on the carburetors where you cannot easily adjust the mix to get the engine to run better.

If there are adjustment screws on the carburetor, try turning the high speed adjustment screw a bit counter-clockwise (if the limiter cap will allow it). This will enrich the fuel/air mix a bit and might help the engine run a bit better.

Oct 11, 2009 | Garden

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4.5hp Brigss & Stratton engine.Engine runs rough.

Ok, check the air filter, it could be clogged. A clogged air filter won't allow a proper air-gas mixture. Then check the carb. make sure that it is clean, or if anything doesn't look right. You might have to get another carb. After that check the intake it could be clogged but this time a clogged intake means that there isn't enough fuel getting to the combustion chamer.

Aug 10, 2009 | Garden

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