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Tecumseh Timing With Nova Ignition Module


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#1 Dee OFFLINE  

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Posted October 15, 2012 - 10:59 PM

From this page, http://gardentractor...om/ignition.htm, I see the NOVA II Electronic Transistorized Solid State Ignition Module is recommended for the Tecumseh engines.

I have a Tecumseh HM80 8hp engine which I cannot get started and I
believe it is because of a timing issue. I would like to switch to the
NOVA II module to help resolve my problem but I am uncertain of how to
position the stator with this type of ignition module.

I know the stator has a range of movement for positioning the coil to
get the correct timing of .090" BTDC. This is normally done with points
and the ohm meter. Right now I can't get the engine timed to that
position because the range of stator movement is not sufficient. I
suspect the problem to be worn points lobe.

Can anyone tell me how to correctly position the stator if the NOVA II
module replaces the points and condenser ?

Edited by Dee, October 15, 2012 - 11:01 PM.


#2 Amigatec OFFLINE  

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Posted October 16, 2012 - 02:55 AM

By stator do you mean the magneto coil?

On mine I got it as close to the flywheel as possible without it touching. The Nova module was already installed.

#3 Dee OFFLINE  

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Posted October 16, 2012 - 03:09 AM

By stator do you mean the magneto coil?

On mine I got it as close to the flywheel as possible without it touching. The Nova module was already installed.


I think you are referring to the air gap. On the Tecumseh the air gap is pre-set and not adjustable. The stator is on an adjustable bracket that has the coil on it as well as the old points and condenser. The bracket is bolted to the block and has slotted holes which allow for some movement to adjust the timing. The final timing position is normally set with the points and an ohm meter but now I need to know how to set the final timing position without points.

Edited by Dee, October 16, 2012 - 03:53 AM.


#4 Dee OFFLINE  

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Posted October 17, 2012 - 02:09 PM

Am I the very first person to try this on a Tecumseh ?

#5 pursual OFFLINE  

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Posted September 04, 2015 - 08:27 PM

I have tried the nova mod on my H60 with no success. No spark. There was spark with the mechanical points. 

 

Should the Nova be install negative ground, or positive? 

 

The paperwork says it might not work with flywheels with multiple magnets. Mine has two (with internal coil under flywheel). Anyone had success with this? 






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