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#1
C
clem
checked spark plugs,have fresh gas medium grade.Was using low grade gas.
#2
L
logan01
Possibly the governor more likely the carb needs, a thorough cleaning, rebuild, or replacement.
#3
M
mechanic mark
Post all numbers from engine data plate, check oil level, gas filter, linkages & springs at carburetor , air filter, spark plugs & gap.