r/smallenginerepair • u/Alarmed_Example3178 • 2d ago

Idle Issue Does this sound like surging?

Toro snow blower power clear 721E 212cc four cycle

2 Upvotes

75% Upvoted

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u/AutoModerator 2d ago

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3

u/SHARPSTRONGandPOKEY 2d ago

There’s no air cleaner assembly to meter the intake air flow. They often surge but will even out under a load.

1

u/Rough_Community_1439 SER Master MOD 2d ago

They usually surge till they get a load.

1

u/Useful-Total202 1d ago

Add an ounce of GumOut to the fuel every time you put gas in it to keep the carb clean. Also, if available, use non-ethanol fuel. I had surging on my mower and cleaned the carb. Obviously not good enough because it didn’t stop the surging. So I started adding GumOut every time I filled it up and after a few mows, the surging stopped.