QuestionI just bought a Honda HS55 Snowblower in like new condition. Started up great but the engine sounded like it was running way too fast. Put a tach on it and found that at idle it was 3700 rpm and wide open throttle it was running at 4700 rpm (no load). I took off the air filter and found the linkages to be free and nothing appeared to be wrong with the way the governor was hooked up.
I tried to adjust the throttle adjustment screw for wide open throttle and it was bottomed out (can't reduce rpms with this - no adjustment left). I moved the governor spring from the hole it was mounted in (furthest from the governor shaft) and put it in the hole closest to the shaft). The engine now runs wide open throttle at approximately 3900 rpm and will idle around 3000 rpm.
Problem is that when I use the blower and the motor is under load, the rpms will not stay around 3600 to 3800 rpm. They drop to around 3100 rpm and will not increase until load is removed.
I found an on line spec for for the Honda GX140 engine that is on this machine: 2200 rpm idle and 3800 rpm max. Am I missing something in the setup?
AnswerHello Vic:
Did you Adjust the Throttle Stop Screw? You can View a Breakdown/IPL of the Mower/Engine at this Site Addy, http://hayward.arinet.com/scripts/EmpartISAPI.dll?MF&app=ASP&lang=EN&TF=Mainfram... and Select the Catalog American Honda. Now Select the Engine File and Scroll to your Engine and Select it. Then Select the Carburetor File. I Used the GX140 HX Model Engine for a Reference. 1- The Throttle Stop Screw is Turned Counter Clockwise to Lower the Idle RPMs. Reverse Whatever you Did to Lower the RPMs. Now Adjust the Throttle Stop Screw. If you Completely Remove this Screw, the Engine should Die when the Throttle is Placed in the Idle Position. 2- If Moving the Throttle Stop Screw (#11 in the Carburetor Breakdown) has No Effect on the Engines Idle, then Remove the Throttle Stop Screw and Try Moving the Throttle by Hand. Also, on Some Models the Throttle Control Valve Inside the Carburetor Throat sometimes will Loosen and Cause this Problem. Remove the Carburetor and Check the Throttle Control Valve (this is the Valve/Plate that the Throttle Linkage from the Governor Arm Moves when it Moves the Throttle Thru Shaft Plate to Increase/Decrease the Engine RPMs. Look Into the Carburetor Throat and Move the Throttle Shaft. You can See the Throttle Valve Moving when you Move the Throttle Thru Shaft Plate. You are Correct on the Suggested RPMs for this Engine. Usually 2000-2200 RPMs Idle Speed and 3600-4000 RPMs Full Throttle is a Good Range for these Engines to Operate at. 3- Set the Governor. The Following is an Instruction File I Made for Making this Adjustment. Any Input is Appreciated. If you Removed/Loosened the Governor Arm from the Governor Shaft or Put the Linkage in a Bind when the Carburetor was Removed, then Reset the Governor. **To Reset the Governor; Loosen the Governor Arm Bolt and Turn the Governor Shaft Clockwise Until it Stops. Using the Governor Arm Hold the Carburetor to Full Throttle. Now with the Shaft Full Clockwise and the Governor Arm and Carburetor Held at Full Throttle, Tighten the Governor Arm Bolt. If the Engine Still Runs Full Throttle, then Reverse the Rotation of the Governor Shaft, but Still Hold the Carburetor at Full Throttle with the Governor Arm. If it Still Runs at Full Throttle, then Check the Internal Governor.** If you Hit a Snag or this Does Not Correct the Problem, I am Here if You Require More Assistance. Hope this Helps. Let me Know What Happens, Please. Have a Happy Holiday Season and May the All Mighty Bless You and Yours. Be Safe and Happy. 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 8pm EST (US). My New Day Starts then. Comments and Ratings are Greatly Appreciated. Thanks.
Respectfully
John
