2 Cycle Engine Problem


Old 04-19-02, 01:47 AM
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Problem with 2 Stroke hedge trimmer

Why does my 2 stroke hedge trimmer pop when i pull the trigger hard. It seems like it might be a ignition problem. Would a new plug likely solve the problem or is it something more major like a tuning problem. It is a Sears Craftsman model if that matters.

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Old 04-19-02, 06:47 PM
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Carb Cleaning or Rebuilding

Hello and Welcome Striker27 to our Small Engine forum.

The problem is not likely to be an ignition problem. The condition is more likely to be a lean fuel mixture. This condition is caused by a slightly gummed up carb or a restricted fuel flow into the carb.

Once the condition occurs in a carb, about the only successful correction is to disassemble the carb and clean it out. All fuel passages and fuel ports must be cleaned and cleared.

Diaphram carbs usually require a new diaphram. Successful carb cleaning for all types of carbs oftens requires replacement of the needle and seat as well.

Stale fuel left in fuel storage cans will turn stale and if used will also gum up carbs. The trick for 2 cycle fuels is never to pre mix more fuel then can be used in a month or store regular fuel for more then a month.

Without knowing the exact carb your referring to specifically, if your going to remove the carb and clean it out, first turn any fuel or air screw inwards while counting the turns it takes to lightly bottom the screw in.

Then remove the screw. When reinstalling the screw, turn it in all the way until it lightly bottoms. Then unscrew it outwards the same number of turns it took to bottom it out.

Doing this will insure returning the screw to as close to it's orginal setting as possible. A minor adjustment to the screw or screws may be needed after reinstalling the carb and running the engine.

Read the RECENT postings & ARCHIVES, within this forum, for other postings on this topic of carbs and the replies offered.

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Old 04-20-02, 01:03 AM
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Does the engine idle ok or does it run fast? Later Butch

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