Join Date: Oct 2006
Posts: 17
11-05-08, 02:51 PM
#1
Briggs And Stratton INTEK 190 6hp surging
This engine is on an Excel 2525 pressure washer.
Starts easily runs OK but surges up and down without developing full power. Cleaned carb twice with carb cleaner and air. Has no adjustments. Only fixed orifices. Used SS fishing leader to carefully probe the jets. Cleaner flows readily. Have not touched the gov. Do not believe it to be the problem. Springs are in good shape and still set to the #4 hole from the factory. Testing with fuel tank removed on long , new fuel line. I feel it has to be running lean but can't see why. Idles OK. Tries to respond to full throttle. Small amount of choke improves, not cures, the problem.
Any ideas?
Thanks
Starts easily runs OK but surges up and down without developing full power. Cleaned carb twice with carb cleaner and air. Has no adjustments. Only fixed orifices. Used SS fishing leader to carefully probe the jets. Cleaner flows readily. Have not touched the gov. Do not believe it to be the problem. Springs are in good shape and still set to the #4 hole from the factory. Testing with fuel tank removed on long , new fuel line. I feel it has to be running lean but can't see why. Idles OK. Tries to respond to full throttle. Small amount of choke improves, not cures, the problem.
Any ideas?
Thanks

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Join Date: Jun 2006
Posts: 2,333
MO
11-05-08, 07:43 PM
#4
I am not sure if your carb has metering holes at the base, however check the bowl nut, the holes if any should be at the base. Also sounds like an air leak, so while it it surging spray carb cleaner along the mating surfaces behind the carb and intake, if the engine changes tempo you have found the leak and can take the proper action. Have a good one. Geo
Join Date: Oct 2006
Posts: 17
11-06-08, 02:27 PM
#5
Briggs Stratton surging
Thanks geogrubb. I did as you suggested and you are right on target. There is an air leak but seems to be around the throttle shaft not intake. Does that make sense? Know more when I have time to take it apart again. This engine couldn't have more than 30 hours on it. Of course the carb looks like a gutless wonder so not surprised. B&S upper management must be really proud of this one.
Thanks again, appreciate your help, hefe
Thanks again, appreciate your help, hefe