Tecumseh Surges

Aforce · 06-06-2009, 05:23 PM

I have a Tecumseh model # LV148EA for a 21" walk-behind Yard Machine lawnmower. I have looked at lots of troubleshooting guides and forum threads on many sites regarding surging but none describe my exact problem. The engine runs great when cold or mildly warm but after 2-3 minutes the throttle plate / governor link just starts wildly moving back and forth. All the way one direction and then fully the other. If I let it cool down it works great again, all maintaining status quo, until the engine gets back up to full operating temperature. No other articles seem to mention this warm-up/cool down period. Fresh gas, good plug, did full disassemble and cleaning of carb.

**octaneman** · 06-07-2009, 10:17 AM

Hi Aforce

Did you make the necessary carburetor adjustment after you cleaned the carburetor? Have you checked the fuel vent cap for obstruction? The surging problem could be caused by the governor not properly set, bad RPM adjustment, the carburetor shafts, linkages, shutters are sticking or binding, it may have an intermittent spark and the ignition needs to be checked.

wtgolem · 06-14-2009, 11:06 PM

I have same problem with a 3.5 HP model H35-45674W. I have not figured what the problem is. But if I hold the throtle linkages in an open position it will continue to run. I think there is something wrong with the governor.
Walt

06-06-2009, 05:23 PM	#1 (permalink)
Aforce Registered User Join Date: Jun 2009 Posts: 1 OS: xp	Tecumseh Surges I have a Tecumseh model # LV148EA for a 21" walk-behind Yard Machine lawnmower. I have looked at lots of troubleshooting guides and forum threads on many sites regarding surging but none describe my exact problem. The engine runs great when cold or mildly warm but after 2-3 minutes the throttle plate / governor link just starts wildly moving back and forth. All the way one direction and then fully the other. If I let it cool down it works great again, all maintaining status quo, until the engine gets back up to full operating temperature. No other articles seem to mention this warm-up/cool down period. Fresh gas, good plug, did full disassemble and cleaning of carb.

06-07-2009, 10:17 AM	#2 (permalink)
octaneman Mentor Home Support, Gearhead Automotive Center Join Date: May 2009 Posts: 543 OS: WINXP	Re: Tecumseh Surges Hi Aforce Did you make the necessary carburetor adjustment after you cleaned the carburetor? Have you checked the fuel vent cap for obstruction? The surging problem could be caused by the governor not properly set, bad RPM adjustment, the carburetor shafts, linkages, shutters are sticking or binding, it may have an intermittent spark and the ignition needs to be checked.

06-14-2009, 11:06 PM	#3 (permalink)
wtgolem Registered User Join Date: Jun 2009 Posts: 1 OS: Xp	Re: Tecumseh Surges I have same problem with a 3.5 HP model H35-45674W. I have not figured what the problem is. But if I hold the throtle linkages in an open position it will continue to run. I think there is something wrong with the governor. Walt