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Mend Mountfield Mower Adjust Adjustment

Mountfield mower is running to rich - how do you adjust it?

Hi- I have a mountfield mower, which runs on unleaded and seems to require no adjustment. It's 2 yrs old but now coughs out black smoke and does rev consistently - any suggestions?

Simon
May 2007
MountfieldGarden Tools, Lawn MowersMower Adjust Adjustment
ive got a mountfield sp470.i had the same problem as you,it was running very poor with black smoke.if you take the air filter off then undo the carb fixing screws and the 13mm bolt that holds the fuel tank on.remove the carb and blow all the holes out and the holes in the fuel tank where the carb sits.i used a drinking straw for this.the job is not as hard as you may think.my mower now runs great again.

rich
June 2007
Check the air filter, that's the most likely problem - and don't forgrt to clean your spark plug, it will be black with carbon.

Christian Clarke
May 2007

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Mountfield Mower Running Rich - Fix & Adjust