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Curtis B.
Curtis B., Technician
Category: Small Engine
Satisfied Customers: 13581
Experience:  have worked on and around most engine models for 35 yrs./Polaris ATV expert
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I'm having the same issue. Remove the spark plug, it pulls.

Customer Question

I'm having the same issue. Remove the spark plug, it pulls. Put the plug back in, the pull cord doesn't move. Kept the spark plug in and removed the muffler, still doesn't pull.
Submitted: 1 year ago.
Category: Small Engine
Expert:  Briggs-Fan replied 1 year ago.
Hi my name is ***** ***** welcome to Just Answer
Customer: replied 1 year ago.
I'm new to this forum. Where do I find your answer?
Customer: replied 1 year ago.
Hello??
Expert:  Briggs-Fan replied 1 year ago.
I'm here , it sounds like the compression is to high
Expert:  Briggs-Fan replied 1 year ago.
By removing the spark plug you are eliminating any compression build up .
Expert:  Briggs-Fan replied 1 year ago.
What type of equipment do you have , if it has a ohv engine then most likely the valves need adjusted .
Expert:  Briggs-Fan replied 1 year ago.
Let me pull a diagram
Expert:  Briggs-Fan replied 1 year ago.
Ok seeing this is a ryobi , it has a cam I believe . Here is the diagram , I'm trying to find a better one , but if that cam broke the timing is off http://www.ereplacementparts.com/ryobi-ry34440-gas-string-trimmer-parts-c-7931_15633_129989.html?page=2
Customer: replied 1 year ago.
Thanks. Here are 2 photos, one with plug wire on and one without so you can see better. Thought it might help to confirm you have right diagram
Expert:  Briggs-Fan replied 1 year ago.
Here is a great diagram . Part 52 is the timing belt
Expert:  Briggs-Fan replied 1 year ago.
http://www.ereplacementparts.com/ryobi-ry34440-gas-string-trimmer-parts-c-7931_15633_129989.html?page=2
Expert:  Briggs-Fan replied 1 year ago.
Did the belt come off etc. ?