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Kohler XT-7 (pressure washing) dying at sustained load/throttle #5449981 06/09/20 07:14 PM
Joined: Mar 2004
Posts: 2,168
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92saturnsl2 Offline OP
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I have a 8-9 year old pressure washer with a Kohler XT-7 (173cc IIRC) engine that is having trouble running at sustained load. It just started doing this last time I used it, but the problem is consistent.

It will run fine at its normal RPM (no load), but when you hold down the trigger on the wand for more than 7-8 seconds or so, the engine starts stumbling and will quickly die if you keep it held down. If you let the trigger go for a few seconds, you can continue for several seconds and it will run fine until you hold it down too long. If I reduce the RPM the pressure washer will run fine under load for long periods, so I presume this is a fuel starvation issue.

No fuel filter on this unit. Is there anything in the carb worth tinkering with that could cause this issue? Or is it cheaper/easier to just replace the carb and hope for the best?


96 Grand Prix SE 150k Chevron Delo 5w-40 Synthetic
04 Odyssey EX 205k Shell Rotella T5 10w-30
96 Maxima GLE 275k Mobil Super HM 5w-30
07 Chrysler Pacifica Limited 4.0L 151k Rotella T5 10w-30
Re: Kohler XT-7 (pressure washing) dying at sustained load/throttle [Re: 92saturnsl2] #5450139 06/09/20 10:27 PM
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tomcat27 Offline
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Gas tank vent?


2019 Cherokee, 2018 Jetta, 2014 Sentra, 2001 Camry, 1995 Escort, 1970 Cougar, 2013 XT250, 2010 Vstar, 2014 CTX1300
Re: Kohler XT-7 (pressure washing) dying at sustained load/throttle [Re: 92saturnsl2] #5450286 06/10/20 07:21 AM
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Driz Offline
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Loosen that cap and see. Otherwise it’s the infamous never ceasing plugged up carb venture. That tiny little plastic or brass tube an inch long above the fuel inlet seat has many microscopic holes across its sides that love to plug. Not sure Kohler has that design though but be aware for it. New carbs usually are cheap on Fleabay -$20 too.
To avoid most of the headaches get a pack of Fleabay 1/4” shut offs and Mount it in your fuel line, 5 are under $7. Shut it off with that if it’s going to sit. At the least run it dry at seasons end, layup ect.
Here’s what gas did to an under year old Toro bowl left with gas in it over the winter🤣 [Linked Image]
check out Project Farm on Youtube. He has an experiment on leaving gas in carbs on layup. Note none of the fuel storage additives really did much good !

Re: Kohler XT-7 (pressure washing) dying at sustained load/throttle [Re: 92saturnsl2] #5450290 06/10/20 07:29 AM
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Donald Offline
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Check the spark plug just because its easy. I have seen a gas filter screen inside a gas line. Governor?


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