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- Sep 24, 2017
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GX390T2 QAPW
My gx390 on my personal pressure washer has been giving me a bit of a fit lately. i cleaned the carb several times (compressed air, soaking, and Carb spray), so i finally bought a New honda carb, and installed new intake gaskets. Thing idles beautifully now, however when i put it up to full throttle it surges. choke it almost half way and it smooths out, HOWEVER, i can manually move the governor arm through the RPM range and it will not surge. So i kinda think it's the governor making it surge, then again, i can choke it almost half way and it will smooth out. I've also checked for air leaks around the carb with WD-40, and there are no apparent leaks while running.
So i guess the Cheapest option first is i will adjust the governor, if that doesn't work then i may start on drilling out the main jet. I just wanted to be sure i am correct in my thinking that surging at high rpm will be a main jet issue and not in the idle circuit. as it idles perfectly.
any suggestions on a good micro bit set?
My gx390 on my personal pressure washer has been giving me a bit of a fit lately. i cleaned the carb several times (compressed air, soaking, and Carb spray), so i finally bought a New honda carb, and installed new intake gaskets. Thing idles beautifully now, however when i put it up to full throttle it surges. choke it almost half way and it smooths out, HOWEVER, i can manually move the governor arm through the RPM range and it will not surge. So i kinda think it's the governor making it surge, then again, i can choke it almost half way and it will smooth out. I've also checked for air leaks around the carb with WD-40, and there are no apparent leaks while running.
So i guess the Cheapest option first is i will adjust the governor, if that doesn't work then i may start on drilling out the main jet. I just wanted to be sure i am correct in my thinking that surging at high rpm will be a main jet issue and not in the idle circuit. as it idles perfectly.
any suggestions on a good micro bit set?
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