Question about Cub Cadet Garden
Engine start and run up to 1/2 speed thin spit or backfire thro carburetor from 1/2 to full speed , just did a valve job , set valves , clean carburetor , clean out gas tank and line new filter, check key in flywheel , didn't help,stell spit and backfires out of carburetor , what to check nex???
Only thing left is valve seat is loose and poping loose at a certain rpm causing backfire threw carb has to be intake valve
Posted on Jun 07, 2014
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Posted on Jan 02, 2017
Hi, Check that you have the correct spark plug fitted or fit a new one as it sounds like your plug is getting hot then shorting out.
Sometimes the magnito can do this as well. but I would start with the plug.
Posted on Nov 29, 2008
I always replace the air filter if its a paper element, and even if its a foam element I replace it rather than clean it. That said, engine stumbling is rarely and air flow problem - but it could be, so having a new filter assures no air restrictions.
I would drop the carbuerator bowl. On the bottom of the carb, near where the fuel line comes into the engine, should be a nut. Removing this nut allows the bowl to drop off the carb. Some engines the bowl screws off, you will have to look at the bowl. Often the bowl has sediment or sludge buildup inside. Cleaning the bottom of the bowl can prevent that sludge/sediment from plugging the intake tube. Even on newer mower models this is a common problem, the gas line tubing interior breaks down and the inside of the tubing can start degrading - ending up in the bowl as sludge.
After cleaning the bowl, I would add one ounce of fuel line cleaner to a full tank of fuel and run the entire tank of fuel. This will clean any deposits or "varnish" from the interior carb parts. Doing this and the first step will assure your carb is clean and functioning.
If that doesn't help, then I would look at the spacing between the magneto and coil assembly. If you want to do that I'd like you to write down all the model numbers and serial numbers on the engine nameplate, that way I can give you specific directions.
Hope this helps,
Posted on Mar 29, 2009
Hi Dave, it sounds crazy, but try this. Check your gas cap. It could be clogged, causing a vacuum to occur in the tank, and therefore not allowing the carb. to take on gas. It usually take 10-15 min. for this to occur. The next time you run the mower and it starts to stall out, loosen the gas cap and see if it begins to run again. If it does, then you know that the gas cap is clogged.
Posted on Jun 05, 2009
It looks like that your valves need to be maintenanced. This can be done by small engine repair shops. They should have the proper tools.
Also the "timing" of the spark and the fuel injection could be a problem. I hope this helped you.
Posted on Sep 30, 2009
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