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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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Posted on Jan 02, 2017

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02 Kawasaki prairie fires but wont stay running. Please help.


You've got spark to get it to fire, but not enough air or fuel to keep it running. When you are starting the engine, your carburetor makes the fuel mixture richer, by reducing the amount of air in comparison to the amount of fuel it's sending to the engine (that's the "choke"). Then, when it's running the motor's vacuum rebalances the mixture to normal and that's when you conk out. Chances are it's a fuel delivery issue, without that choke the mixture goes too lean (not enough fuel).

You've probably been running standard gas with 10% ethanol. I have found that on older ATV's (like my 98 Honda), especially if the ATV sits for a month or two unused, ports in the carb clog with the residue from ethanol and it needs to be cleaned.

Unfortunately, you can't just spray something in the intake of the carb, you have to remove it and spray the cleaner into numerous ports in the carb and preferably blow them out with compressed air. If you're mechanically inclined, it's pretty easy, and costs almost nothing. However, ethanol also attacks rubber parts used in earlier carbs, possibly like yours, and that can mean replacing a couple parts, but rarely anything expensive.

Jan 10, 2017 | ATVs

1 Answer

Fuels rich , how do I adjust this problem


go on line and find service info on your carb you will need to find out the setting for fuel air mixture screw it should turn in to reduce fuel to air mixture but find out the setting for your make of carb as they all vary

Mar 17, 2015 | Motorcycles

1 Answer

I need to know the proper tuning of ucal mikuni carburetor with mixture adjusting screw on bottom of cabr (beneath float bowl), an idle adjust screw and pilot screw (hopefully pilot fuel screw since s


Why did you need to clean the carb? Routine servicing of the aircleaner would keep the carb clean for life. The pilot screw should be 1.5 turns out approx. with a small adjustment either way. Idle speed is set to a smooth low idle.If this doesn't fix it have you got something in the carb not replaced correctly? The float needle/float assy? How did you clean it? Have you introduced fluff/dirt into the carb and did you blow it clean with an airline?

Oct 09, 2014 | Motorcycles

1 Answer

Won't start


Check the fuel level in the float chambers of the carbs, it could be too low! Readjust the float to obtain correct level. Blow out the primary and main jets with compressed air.
Hope you adjusted the air screw mixture at the right temperature of the engine i.e. you need to warm it up and than adjust also check the valve clearance of the engine.
Hope this helps

Aug 06, 2014 | Suzuki GSX 750 F (Katana Motorcycles

1 Answer

1987 Kawasaki GPZ 500 S air/fuel mixture setting


Hi, Anonymous it should be noted that the "AIR FUEL" mixture screw adjustment "ONLY" manages your idle and has no effect on any other circuit also any intake leaks must be repaired before the A/F adjustment procedure can be performed otherwise you will never obtain a proper idle and you will waste a lot of time chasing the impossible. The A/F mixture screw's purpose is to fine tune the fuel charge entering the combustion chamber. The following applies to both 2 and 4 stroke engines:
1. The mixture screw may be sealed at the factory with a Welch Plug please review the following video for removal.
https://www.youtube.com/watch?v=wAXcksgvDkM
2. The mixture screw manages a range of 3 complete 360-degree counterclockwise turns from the bottom/closed position.
3. The mixture screw should have a spring and o-ring for tension and sealing integrity.
4. Turn the mixture screw clockwise until it gently bottoms out, this makes the fuel charge very lean and the engine should not idle if it does then the pilot/idle jet is too big and needs to be replaced with the next size smaller.
5. Turn the mixture screw 1 and 1/2 turns counterclockwise to establish a baseline for starting the engine.
6. To fine-tune the idle circuit, adjust the mixture screw 1/4 turn in or out to achieve maximum idle RPM, wait 15 seconds between each adjustment for the idle to settle.
7. Never go past 3 full turns out this will make the fuel charge rich, foul plugs, and produce black smoke out of the exhaust, if the engine RPM keeps increasing past 3 turns the pilot/idle jet is too small and needs to be replaced with the next size larger.
8. After achieving maximum idle back out the mixture screw another 1/8 of a turn then adjust the throttle cable idle stop screw to 950-1050 RPM.
9. This procedure works great on 99% of all engines, for the 1% that demand a more robust throttle response on aftermarket monster fuel delivery systems additional tweaking outside the box may be necessary.
For more information about your issue and valuable "FREE" downloads that you will need for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
Carburetor Maintenance
Idle Mixture Screw Factory Setting Ex 500 com The home of the Kawasaki...
Kawasaki EX500 Service Manual
OEM Parts for Kawasaki
http://mybikemanuals.com/kawasaki

Jun 01, 2014 | 1987 kawasaki GPZ 500 S - GPX 500 R

1 Answer

1999 Road King Carb Adjustment


Hi Anonymous, on the right hand side of the carburator there is an idle adjusting screw with a spring behind it, turn screw clockwise to increase idle counter clockwise to decrease idle. There is also an air/fuel mixture screw inside a carb body lug that may or may not be plugged with an aluminum cap that's about 3/16" thick. This cap can be drilled out to acess the air/fuel mixture screw. Turning screw clockwise will lean out mixture and lower idle, turning screw counter clockwise will richen mixture and raise idle. You need to balance the two adjusting screws to obtain an idle of 950-1000 RPM then back out air/fuel mixture screw 1/4 turn, snap throttle to confirm responce, you may continue to back out air/fuel mixture screw untill desired throttle responce is achieved, if you see black smoke coming out of exhaust you have gone to far and need to turn screw back in 1/8 turn at a time, final adjustment should be made with the engine at normal operating temperature. Good luck and hace nice day.

Apr 27, 2012 | Harley Davidson FLHR-FLHRI Road king...

1 Answer

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...

1 Answer

I have a john deere 70 1974 with a 7 horse power tecumseh how many times to i turn the either jets on the carb


The bottom screw on the carburetor is the main fuel mixture screw, turn this "in" slowly until is "seats" and then back it out two turns. The idle mixture screw is located on the side (do not confuse with the idle speed screw), turn this in slowly until it seats and then back it out one turn. This will get you in the ballpark but it will have to be fine tuned from their. The proper adjustment is between a "lean" running condition (engine will try to cut off) and a "rich" running condition (engine will load up). The main fuel mixture is adjusted at full throttle position and the idle mixture screw is adjusted at idle speed. Once this is done, you can adjust the idle speed screw in the low throttle position. Hope this helps.

Feb 23, 2011 | John Deere Garden

2 Answers

I have a huskey chinesaw model 50 trying to adjust carb but haveing no luck what is the proper adjustment please help


Hi, Gerald I will try to help. The high speed mixture screw basic setting is about 1 1/4 turns out from lightly seated position and the idle or low speed mixture screw is about 1 turn out from lightly seated position. To get the manufacturers basic or start out setting, remember the position of the screws before you start any adjustments. Both are done the same way. Turn adjust screw in or clockwise until lightly seated (so the soft metal is not damaged when seating the screw) then turn out or counterclockwise, high 1 1/4 turns and low 1 turn out. Do any adjustments in 1/8 turn increments until you get running. Do not turn the high speed mixture screw so there is less than 3/4 of a turn from seated position, The reason is not to run the engine too lean so engine does not overheat. When turning the screw in, there is less gas in the mixture, therefore when turning out you allow more gas in the fuel to air mixture.
The problem might not be adjustment, it could be many other things causing it not to run properly. Make sure the air filter is clean, the fuel filter in the tank is not plugged up. Spark plug might be fouling up, the fuel lines might have dirt or starting to go. The fuel tank is usually vented by the tank cap and might be plugging up not allowing enough air in. Check the bolts screws and gaskets of the carb so there is no air leaking in.
The carb might need an overhaul, cleaning and maybe a carb kit.
These are suggestions to help diagnose the problem. I might have forgotten other things to check out. I hope this helps you out a bit. All the best and good luck.

Feb 06, 2011 | Husqvarna "Chain Saw - 16" Bar, 3 Hp

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