Kawasaki FH430v-AS26-R surging engine issue

tunedude1959

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Jun 5, 2020
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I have an FH430v-AS26-R engine on a Lesco 48" walk behind. Initially I had an issue with flooding engine thinking a stuck float. I attempted to remove the main jet but was old and not coming out. I replaced carb, air filter, fuel pump and filter to no avail. I now have trouble starting and when started it surges up and down and is not coming up to full RPM. I tried to attach a video of it but was restricted.
Any help is appreciated.
Thank you
 

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gregjo1948

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Nov 28, 2012
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Is the carb replacement new? Surging, I've found to be a lean fuel mixture. Engine runs a little too low on fuel so, it opens the governor to compensate and then it gets a bit too much fuel causing the rpms to rise. Then the governor backs off causing a drop in rpms. This rise and fall in rpms is the "surging" or "galloping ". You could try applying the choke slightly to see if it will smooth out.
 
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bjones

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May 19, 2018
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My 345 surged and guy cleaned carb and still no fix and he touched the gov. spring and it quit so he replaced the spring and it fixed it.
 
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