3Horses 10 #1 Posted September 6, 2018 Looking for help why my 520h keeps idling up and down up and down up and down. It runs great but won't stop idling up and down..?????? Any feedback would be very appreciative. Share this post Link to post Share on other sites
Ed Kennell 35,616 #2 Posted September 6, 2018 32 minutes ago, 3Horses said: my 520h keeps idling up and down up and down up and down. Clean the carb, clean the carb, clean the carb. It actually took three carb cleanings to stop the surging on my 520. 6 Share this post Link to post Share on other sites
520hC-120 136 #3 Posted September 6, 2018 Clean the carb very thoroughly and get a rebuild kit for it. The thing should run great after that. 1 Share this post Link to post Share on other sites
The Tuul Crib 7,332 #4 Posted September 6, 2018 I've heard there has also been governor issuses with these motors speeding and taking off. Share this post Link to post Share on other sites
3Horses 10 #5 Posted September 6, 2018 I will clean the CARB. Thank you very much for the help. I will have done by tomorrow evening. Thanks guys. 1 Share this post Link to post Share on other sites
peter lena 8,037 #6 Posted September 6, 2018 in addition to cleaning carb, add sea foam gas treatment, or similar, along with a fresh gas filter , pete 1 Share this post Link to post Share on other sites
3Horses 10 #7 Posted September 22, 2018 I cleaned the carb and she fired right up and runs like a champ. Thanks for the advice 1 1 1 Share this post Link to post Share on other sites
Ed Kennell 35,616 #8 Posted September 22, 2018 Thanks for letting us know. Share this post Link to post Share on other sites
