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25 cc leaf blower . I have installed new plug new ignition coil and fly wheel with .010 gap . And I still have no spark . What's left to do ?

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  • Michael Blandford Dec 21, 2016

    And checked switch with meter and is ok !



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How are you checking for spark. Best is to use inlne spark tester. If laying plug on plastic housing will never get spark because it is not grounded. Rere to have to replace coil and almost never need to replace flywheel. Unplug wire Going to stop switch from coil. If wire is grounded out or switch is bad not spark.

Posted on Dec 28, 2016

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  • Garden Master
  • 48,298 Answers

Check the wires to the stop switch
if they are grounded anywhere that will be the problem

Posted on Dec 21, 2016


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SOURCE: Spark Plug Gap

craftsman 25cc blower vac model 358.797 replacing fuel lines, cannot remember small goes to

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SOURCE: what's the gap setting for the CD ignition

.005 to.008

Posted on Jul 12, 2009

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SOURCE: Need to know specifications of spark plug for Ryobi Leaf Blower

You can download the manual at I have the Ryobi 720r and the sparkplug is a champion RDJ7Y.
Good luck!

Posted on Jul 13, 2009

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SOURCE: I have an 28 cc McCullogh leaf blower which will

Check for spark in the new spark plug, if you have spark clean the carb fully and try again. make sure you have correct mix of gas to oil and it is not old use fresh gas oil mixture. Good luck pal.

Posted on Jan 24, 2010

  • 5568 Answers

SOURCE: craftsman leaf blower wont start

The air gap for the ignition coil core to flywheel is adjustable on some engines and the gap does vary.
On a Stihl, I used a matchbook cover first, then doubled it and got the engine to start. That amounts to 8-10/1000ths (0.008-0.010") as measured with a digital caliper after-the-fact.
I'm troubleshooting another engine currently from a McCulloch Airstream IV that only has ~12 hours and no spark but the coil measures roughly as it should; around 1K Ohms. Was surprised to find the company went bankrupt in '99. Another one killed by Asians and fairly poor design.

Posted on Oct 22, 2010

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