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Puchased a rover quick start 6 months ago. No revs

Mowing dusty dry area. black smoke from air filter. Could the dust be clogging the carby???Using unleaded as specified

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  • afinchum May 24, 2009

    straton engine. It starts up fine but it seems to barely run above idle. When the gas tank is about empty then the engine seems to run better.

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Black smoke should not be coming from your air filter. If however, the smoke is coming from your exhaust this could be the result of dirt clogging your air filter and starving the engine of air, hence causing the motor to run on a rich fuel/air mix. If this is the case clean or replace the air filter element, and keep it clean. Another reason for black smoke blowing out is dirty oil in the crank case, if the oil is very dark brown to black in color or smells burnt then it needs replacing.

Posted on Nov 13, 2008

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Look for a crankcase ventilation tube or such, It may be covered with grass dust and stuff, is probably a sponge to keep dust out of the motor. Rinse it out, and make sure the airway is clear.

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Tip

Save your self some starting trouble.


Aside from changing the oil in your lawn mower, to prevent hard starts and possible complications in the future, regularly check the air filter.

Its an often over looked wearable part that can cause a bit of aggravation when starting, and possible rough running.

You want to make sure that it is not clogged with debris and not extremely dirty. You can have a fairly new filter or machine, but if its dusty, or dry where you mow, it can clog up fast.

When your air filter becomes clogged, it inadvertently chokes the engine causing it to pull too much gas into the engine which leads to flooding of the engine, and the engine not running as well or as efficiently.

In most cases the dirt can be cleaned out if the filter is not really old, and not intensely soiled.

So if your mower seems to be harder to start and it is recent, check the filter. You may be surprised.

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