Small Engines (Lawn Mowers, etc.): Ryobi 790r Trimmer, ryobi 790r, carburetor body

Question
QUESTION: Hi John,

Hope you are well. You have been a great help to me in the past and am seeking your expertise once again.  I have a ryobi 790r trimmer that has worked very well for a number of years.  It worked great 2 weeks ago but I could not get it to start today.  It has fresh fuel mix and I have replaced the spark plug.  If I put a brief spray of starting fluid in the carb it will start briefly and die.  Any advice you could give would be great.  Thanks, Dan

ANSWER: Hello Dan:

1st - Remove the Muffler and Inspect the Exhaust Port for Carbon Blocking the Exhaust Port. Check the Muffler and Spark Arrestor Screen (in the muffler) for Blockage Also. If that Does Nor Correct the Problem or these are Not Blocked, then  2nd - Remove, Disassemble and Soak the Carburetor Overnight in Carburetor Cleaner (I Use Gunk). I have Found that Most People can Use a Breakdown/IPL and Disassemble the Carburetor Enough for Proper Cleaning. You Only have to Remove the Bowl, Float Pin, Float and Needle Valve and Any Adjustment Screws that Go Into the Carburetor Body. The Welch Plugs Do Not have to be Removed. Then Soak the Carburetor Body and Parts in a 1 Gallon Can of Gunk Carburetor Cleaner Overnight. The Can has a Parts Tray Inside it for the Small Parts. Once the Carburetor and Parts are in the Cleaner, you can Replace the Lid for Safety and to Prevent Accidential Spillage. Then Blow Out the Passages with Compressed Air. Install New Parts if Required. Send me the Model Numbers Off the Carburetor or the Carburetor OEM (Walbro, Nikki, ect), Please. With these I can Locate the Proper Manual and Better Assist you. Also I can Locate a Breakdown of the Carburetor for you to View Online to Assist you with the Carburetor Clean and Rebuild. Hope this Helps. I am Here if You Require More Assistance. Let me Know What Happens, Please. Thanks.

Good Luck

Respectfully

John

---------- FOLLOW-UP ----------

QUESTION: Hi John,

The carb looked really clean; however, I took some of the obvious parts off and soaked overnight.  Put it back together tonight and it worked.  You are a life-saver.  Thanks so much.

Answer
Hi Dan:

Great!!! I am Glad I Could Assist you Again. Don't be a Stranger. Stop in and Say Hello Sometime. You Don't Need a Problem to Visit. Have a Nice Holiday. Till Next Time. May All Your Mechanical Problems be SMALL ONES and May the All Mighty Bless You and Yours. Thanks Again.

Best Wishes and Good Luck

Respectfully

John