What is the spark plug gap on a craftman weed wackier17"/25cc gas line trimmer

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What is the correct spark plug gap?
The spark plug gap on all products is .025-inch.

What type of spark plug does the unit take?
The size of the plug varies from unit to unit. On trimmers, blowers and hedge trimmers is RCJ-8Y or RCJ-6Y. Follow the spark plug recommendation and replacement procedures in the operator's manual if you are doing the work yourself.

try running on full choke until it warms up.

Remove the spark plug, install a spark tester into the plug cap ( these are a simple device normallt a dummy spark plug with a large gap ) earth the body of the spark tester well against the cylinder wall, make sure it is away from the open plug hole ,switch the ignition on, and crank the engine, you should see a spark at the tester, tester are readly available from dealers or on e bay.

Standard plug gap is 0.5mm

If you have spark problems, remove the wire and then remove the plug, reattach the wire and ground the plug to the engine and pull the string, you should see arc and hear it pop, if not, take the plug to another piece of equipment and remove that equipment's plug wire and attach it to the plug from the weed ******* and then ground it and test it. If still no spark, then plug bad, if plug then the weed ******* has a problem with the spark plug wire or the ignition coil.

If you have spark at first test, then the problem with the weed ******* is somewhere else.

Spark plug gap or fuel mix either or and when you try to start ,start it with trigger fully engaged and alternate between full choke and half chke and no choke till you get a response.

how do you fix it when the pull rope breaks ? how do you take it a part to puted a new rope on ?

did you set the gap on the new spark plug this you can google or check for last plug then use clean fuel/mix

see manual
http://www.managemyhome.com/mmh/lis_pdf/OWNM/L9060260.pdf

the gap should be 0.030