QuestionQUESTION: Hello,
I have two problems with my Tecumseh engine.
Problem one: The carburetor has been rebuilt with a repair kit but still leaks gas inside the throttle opening. I don’t know which orifice inside is leaking but it leaked before the rebuild. I thought that would cure it.
What is causing the leak and what have I missed in trying to remedy this problem?
(This carb is the one without the float bowl underneath).
Problem two: The engine is being used on a vintage mini-bike that has been restored but, since the engine originally was for a tiller (according to the seller) it does not rev enough to engage the clutch fully. The engine runs ok and responds to the throttle well but, it will not go.
How do I run the engine without the governor controlling the rpm? Does the engine need to be disassembled to disable the governor? I don’t have a problem breaking the case open if it is required. (I have all the manuals on this engine.)
Thank you for your assistance.
ANSWER: Hello Gary:
1- The Carburetor Needle Valve that is Operated by the Carburetor Float is Not Seating Properly. Send me the Model and Type Numbers Off the Engine, Please. With these I can Locate the Proper Manual and Better Assist you. However, Some Carburetor have a Needle and Seat (a Flat O-Ring Inserted into the Needle Valve Recess) for the Needle Valve to Seat Against. Some have a Needle with a Black Rubber Tip. This Needle is Longer than the 2 pc Needle and Seat and Does Not Require the O-Ring Seat. Check the Needle Valve and Float. The Float Should be Level with the Bowl Mating Surface when the Carburetor is Turned so the Float is on Top. 2- The Engine Speed can be Increased by Shortening the Governor Spring or Depending on the Model, Bend the Governor Spring Tab to Stretch the Spring. The More the Governor Spring Pulls the Governor Arm the More the Engine RPMs. Here is a Brief Explanation of How the Governor and Governor Spring Works. **The Throttle Cable Attaches to the Throttle Control Bracket. The Cable Moves a Slide that Moves a Pivot. The Pivot has the Spring Attached to it and to the Governor Arm. The Solid Link Connects to the Governor Arm and goes to the Throttle Shaft on the Carburetor. When the Throttle Cable is Moved it Moves the Pivot and the Pivot Pulls the Spring. The Spring Pulls the Governor Arm and the Governor Arm Moves the Throttle Shaft. Usually the Spring is in the Lower Hole in the Governor Arm and the Solid Link is in the Top Hole of the Governor Arm.** 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
---------- FOLLOW-UP ----------
QUESTION: Sorry I forgot to include the numbers:
Tecumseh H30-35362R (Craftsman no. 143.751032) ser 6119B
Carb pn: 632208
I can take the carb apart again and check the needle and seat to try and fix the leak.
Can I bypass the govenor linkage and attach my control cable directly to the throttle plate and operate the engine that way?
AnswerHello Again Gary:
As for the Throttle Hook Up. I Do Not Suggest you Bypass the Governor. Shorten the Governor Spring or Bent the Tab to Tighten the Spring and the Engine RPMs will Increase. You want to Keep the RPMs Below 3400. Since this is a Tecumseh Engine, I have a PDF Site Addy that May Assist you Also. http://www.tecumsehpower.com/CustomerService/BSI.pdf. Hope this Helps. I am Here if You Require More Assistance. Let me Know What Happens, Please. Thanks.
Good Luck
Respectfully
John
