This season the Sears weed whacker (strimmer) now fails to run. (It started OK when taken from storage and ran OK for less than an hour's initial use.) I changed the diaphragm which was indeed stiff (3 years old) but now cannot start the motor. Is there a web site with useful trouble-shooting check lists?
oil mixture is wrong or spark plug fouled pull plug clean and sea if spark when cranked over good luck!
Thanks for advice. I put in a new spark plug last week (and changed the carb diaphragm yesterday.) That is why I asked for a steer to subtler troube-shooting.
Try this...bottom each needle valve moving 1/4 turn at-a-time, and note the number of turns for each. Use this as a reference for re- adjusting later. Remove both valves and spray WD-40 with a tube into each. This should clean the venturis. If you mess-up the valve adjustments, bottom them (lightly) and back them out 1 1/4 turns each. It should run from this point, but may need fine tuning. This is known as "a Polish Tune-up".
Make that 1 to 1 1/8 turns on that back-out. (It's been awhile since I did it, and I am advanced in age, so beware! ; )
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