Small Engines (Lawn Mowers, etc.): Honda HRM21-AN lawnmower eng. speed, carburetor body, adjustment screws

Question
Mower starts fine runs good at slow speed and can creep up on low-med speed ok.  Dies at high speed anytime or med speed when cutting grass.  Changed pulg, no joy.  Last use - the rpm slowed while cutting w/slow speed and when I pushed it higher it ran at high speed just fine. This time it's back to the slow rpm only mode.  Also does ethanol mixed gas cause any problems as that's all that's available here now?

Answer
Hello George:

Send me the Model Numbers Off the Engine, Please. With these I can Locate the Proper Manual and Better Assist you. You can View a Breakdown/IPL of the Mower at this Site Addy, http://hayward.arinet.com/scripts/EmpartISAPI.dll?MF&app=ASP&lang=EN&TF=Mainfram... and Select the Catalog American Honda. The Ethanol Should Not Cause Any Problems. I Use it All the Time. Check the Throttle Cable and Ensure it is Moving the Throttle Control on the Engine Properly. When was the Carburetor Cleaned Last? If it has Been a Few Years, then the Carburetor May Require Cleaning.  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 Accidental Spillage. Then Blow Out the Passages with Compressed Air. Install New Parts if Required. Hope this Helps. I am Here if You Require More Assistance. Let me Know What Happens, Please. Thanks.

Good Luck

Respectfully

John

PS: I am Allowed to Answer 10 Questions a Day. If you See I am Maxxed Out, then Try Submitting your Question at or Just After 9pm EST (US). My New Day Starts then. Thanks.

Respectfully

John