HRX2174HYA Surges While Under No Load

Jenebo

Forum Newbie
My mower will run fine while the blades are engaged, but when the bail is released and the blades stop, the engine will sit there and surge. I have used fresh gas and used a little seafoam, but since the engine runs fine when the blade is engaged, it just seems to me that this is not a fuel issue. Also this only does it when the engine is warm. For example, when the engine is first started, it runs fine. Once I mow a little bit and stop to empty the first bag, it will surge.
 
and used a little seafoam
So that is not working for you.

I would dump and clean out the fuel tank. Install new fuel lines and filter. Boil clean the carb.

As Bert said, idle circuit clogged (y) . So low load surges, blade on, high load is fine. Blade on, the engine is on the main jet.
 
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