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Garden Tractors Discussion Forum

Re: Tecumseh HH100

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Author  [Modern View]

01-13-2013 20:26:50

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Yep, I've had my carb bowl off three times too. The first time it NEEDED it.. full of rust flakes and the float was set incorrectly. Now the bowl leaks too, so back to the parts store for gaskets and a O-ring. I turned the gas tank off and on so many times now it leaking too. Sediment bowl gasket, I think. Hoo boy!
As for the condenser, how does it work without one? Just enough residual current in the coil?

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joe csuti

01-14-2013 13:31:58

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 Re: Tecumseh HH100 in reply to IrvIA, 01-13-2013 20:26:50  
With an electrical circuit that has an inductive load(coil)when the sw contacts or points open a back emf or spike voltage is generated up to 3X the supply voltage for a fraction of a second as the magnetic field in coil is collapsing

The function of the condenser is to absorb/quench this spike voltage to reduce voltage to as near 0V as possible before next close/open operation of points,this now gives max voltage buildup in coil primary & giving max hv to plug,without condenser or if condenser open/shorted voltage in primary of coil stays high & gives the same effect as points not opening,the condenser also prevents arching/burning of point contacts.

I've had the same experience as anon with several briggs eng with a bad/weak condenser,eng would be hard starting & only run rough at idle/slightly above & when you goosed throttle eng would die.

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01-17-2013 13:24:00

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 Re: Tecumseh HH100 in reply to joe csuti, 01-14-2013 13:31:58  
Thanks for the lesson on just how that all works. Kinda remember that from reading a Motors Manual forty years ago, but sorta lost the details.


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01-17-2013 13:13:47

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 Re: Tecumseh HH100 in reply to joe csuti, 01-14-2013 13:31:58  
I've also had that when the condenser was bad, but mine wouldn't run at all, like you said, beause it was open/shorted. I was just confounded by the fact that it would run without one. Irv

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01-13-2013 20:41:31

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 Re: Tecumseh HH100 in reply to IrvIA, 01-13-2013 20:26:50  
Last year that happened to me o a HH100 the coil that came with the engine had a capacitor mounted on the coil well I couldn't find the coil so I just grabbed another one an no spark figured it was a bad coil tried another same results finally the light came on and I found the other coil with cap istalled it had spark and the engine started up and ran good. No haven't seen one that would fire without a cap.

GB in MN

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01-14-2013 08:12:53

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 Re: Tecumseh HH100 in reply to MNGB, 01-13-2013 20:41:31  
Is seems like my light is off more than it is on these days.

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