Small Engines (Lawn Mowers, etc.): techumsa ariens snowblower, ariens snowblower, diaphragm type

Question
I am working on a techumsa model #H30-35380R ser.#7160B      The problem I am having is that when it gets hot it will start to sputter as if it is running out of fuel, but its not."cleaned tank, new carb., new coil". The unit is hard to start and when it does start it sounds like it is "missing". I Was wondering if that unit has points & condenser or what else it can be. the carb. is diaphragm type no float bowl. i would app. any help than you can give me, thanks  

Answer
 Hello Scott:

 You can View a Breakdown/IPL at this Addy http://www.outdoordistributors.com/ and Select the T. Then Select Tecumseh. Then Select Don't have Part Numbers. Enter the Model Numbers H30-3580R and Click Go. Then Download the File for Online Viewing. Two Causes for this Problem. 1- Valves Need to be reseated and Adjusted. 2- Bad Coil(solid state ignition). Hope this Helps. I am here if you Require more Assistance. Thanks.

 Good Luck

 Respectfully

 John