Please help with Tecumseh Motor

msias · 05-17-2009, 08:20 AM

Hi and thanks for any help you may offer.
I have two gokarts for my kids. They are both identical with the same tecumseh motor (OHH60). I am having a very hard time trying to figure out what is wrong with one of the motors. I got both of these used and neither one of them were running. The first gokart all that I did was take of the carb, clean it out real good and it started right up. I tried the same thing with the second gokart. I can get it started now but only by pushing the primer bulb and holding it in. I took off the gas tank, cleaned it out and inspected the fuel line. I have even exchanged carbs with the gokart that runs fine and have the same problem so I don't think it is a carb problem. I have also installed a new spark plug. Thanks for any suggestions.
Mike

**octaneman** · 05-17-2009, 09:12 AM

Hi Msias

Adjust the float level on the carb it's running too lean, also increase the idle and it should run OK.

msias · 05-17-2009, 09:23 AM

Why then will the same carb work perfectly on the other gokart?

k2skier · 05-17-2009, 04:46 PM

Quote:

Originally Posted by msias

Why then will the same carb work perfectly on the other gokart?

Are you saying you swapped the carbs between the 2 engines?

The are 2 small holes in the bowl nut, main jet, that are easily over looked.

Check the valve clearance.

msias · 05-18-2009, 06:22 AM

Yes I swapped the carbs and put the one that was on the running gokart onto the one that was not running. That is why I am saying that it cannot be the carb.

k2skier · 05-18-2009, 10:13 AM

Valves not seating (seat and faces), valve clearance, head gasket, leaky intake manifold, check these out first.

**octaneman** · 05-18-2009, 10:19 AM

When carburetors get fouled up, adjustments are made to compensate for the discrepancies. The engine begins to run with the new settings and they vary from engine to engine, but it doesn't mean they are correct. During the cleaning process, fine adjustments are easily overlooked and when they are reinstalled the engine will not run at all or it will make the problem worse. You mentioned that you swaped the carbs from one engine to another and it worked. I'm trying to understand, did you swap the working carburator to the engine that didn't run or vice versa?

Texas rose · 05-23-2009, 01:21 PM

Check that the flywheel key hasn't sheared off and allowed the flywheel to move, thus putting the timing out.

05-17-2009, 08:20 AM	#1 (permalink)
msias Registered User Join Date: May 2009 Posts: 3 OS: xp	Please help with Tecumseh Motor Hi and thanks for any help you may offer. I have two gokarts for my kids. They are both identical with the same tecumseh motor (OHH60). I am having a very hard time trying to figure out what is wrong with one of the motors. I got both of these used and neither one of them were running. The first gokart all that I did was take of the carb, clean it out real good and it started right up. I tried the same thing with the second gokart. I can get it started now but only by pushing the primer bulb and holding it in. I took off the gas tank, cleaned it out and inspected the fuel line. I have even exchanged carbs with the gokart that runs fine and have the same problem so I don't think it is a carb problem. I have also installed a new spark plug. Thanks for any suggestions. Mike

05-17-2009, 09:12 AM	#2 (permalink)
octaneman Mentor Home Support, Gearhead Automotive Center Join Date: May 2009 Posts: 545 OS: WINXP	Re: Please help with Tecumseh Motor Hi Msias Adjust the float level on the carb it's running too lean, also increase the idle and it should run OK.

05-17-2009, 09:23 AM	#3 (permalink)
msias Registered User Join Date: May 2009 Posts: 3 OS: xp	Re: Please help with Tecumseh Motor Why then will the same carb work perfectly on the other gokart?

05-18-2009, 06:22 AM	#5 (permalink)
msias Registered User Join Date: May 2009 Posts: 3 OS: xp	Re: Please help with Tecumseh Motor Yes I swapped the carbs and put the one that was on the running gokart onto the one that was not running. That is why I am saying that it cannot be the carb.

05-18-2009, 10:13 AM	#6 (permalink)
k2skier Registered User Join Date: Sep 2008 Location: Oregon Posts: 313 OS: XP Home-SP3 My System	Re: Please help with Tecumseh Motor Valves not seating (seat and faces), valve clearance, head gasket, leaky intake manifold, check these out first.

05-18-2009, 10:19 AM	#7 (permalink)
octaneman Mentor Home Support, Gearhead Automotive Center Join Date: May 2009 Posts: 545 OS: WINXP	Re: Please help with Tecumseh Motor When carburetors get fouled up, adjustments are made to compensate for the discrepancies. The engine begins to run with the new settings and they vary from engine to engine, but it doesn't mean they are correct. During the cleaning process, fine adjustments are easily overlooked and when they are reinstalled the engine will not run at all or it will make the problem worse. You mentioned that you swaped the carbs from one engine to another and it worked. I'm trying to understand, did you swap the working carburator to the engine that didn't run or vice versa? Last edited by octaneman; 05-18-2009 at 10:29 AM.

05-23-2009, 01:21 PM	#8 (permalink)
Texas rose Registered User Join Date: Nov 2008 Posts: 80 OS: Vista	Re: Please help with Tecumseh Motor Check that the flywheel key hasn't sheared off and allowed the flywheel to move, thus putting the timing out. Last edited by Texas rose; 05-23-2009 at 01:23 PM.