Question about Ryobi RHT2660DA Petrol Hedgetrimmer - 26cc Quick Fire Engine

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I have a Ryobi RHT 2660DA Hedge trimmer that will not start. I have tried the following things; 1. Replacing the spark plug. There is a good spark on both the old and new plug. 2. Adjusted the carburetor as suggested. 3. Put a teaspoon of fuel into the spark plug hole directly. Does not even try. 4. Tried easy start in the spark plug hole directly and into carburetor. No joy. 5. Took off carburetor and cleaned a suggested. No joy. 6. Replaced the available diaphragms (4 in all). No joy. 7. Replace carburetor with a new one. Same result. 8. Checked compression which was only about 50 per square inch. 9. Checked tightness of crankcase screws. All tight. 10. Replace crankcase gasket. Still same compression result. Again no joy. 11. This machine is about 5 years old but only used about 5 or 6 times so should not be a wear problem. 12. Replace mixture (did this early on in the sequence) 13. Took off exhaust which was full of fluid. Cleaned and dried, but to no avail. 14. Stripped unit down as I started to believe this was a timing or compression problems, but I cannot get the bottom clutch unit off (do not know how to remove it as it looks like an interference fit on the shaft. As a result I cannot get to the flywheel to see whether the key way or key has sheared or the timing has somehow moved. I am now at a lost of a way forward. I would appreciate any help or suggestions. At the moment I am left with what is an expensive piece of junk.

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Posted on Jan 02, 2017

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SOURCE: Poulan Gas Hedge Trimmer GHT220 shuts off after 10 min.

your ing. coil is breaking down as it heats up needs to be replaced

Posted on Sep 06, 2009

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SOURCE: Ryobi 700r string trimmer issue. Unit will not

Hi have you checked the carb for dirt?,does the primer bulb work?does the plug get wet?also have you tried to change diaphram/kit there is a company on ebay called smallplantsalesuk where you can get the parts,rgds

Posted on Sep 25, 2010

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