I have tried everything listed in troble shootin manual Plus ground Valve and readjusted to spec. Carb, Cleaned and gapped coil, spark plug, Has strong ignition. Apparentley no adjustment for timming.Contacted Cummins about it with no sucess. Need Help'
SOURCE: starts runs min. or two then stops....
Go to toro.com then click customer care, then click manuals and parts. Type in model no. and download the owners manual. This should get you the spark and flywheel gap. Probably still something in the carb. Some orifices are very hard to find and to clean but they must be clean. Also check for dirt dopper nest in the muffler.
SOURCE: i Have a 1978 Honda
Your plug is telling you the answer here. Look at this chart.
http://www.hioutput.com/tech/plug.html
i have seen engine produce the dry, black soot deposit on plugs when the timing is just a little off. Run some Seafoam thru your fuel system and it will clean the carb, the carbon, the valves...everything.
SOURCE: Engine runs great for 10 minutes and then stalls.
Believe
it or not, your gas cap is clogged up with dirt and debris. When a
carburetor is unable to get a constant flow of air from outside,
pressure builds up on the fuel tank. The fastest way to determine
whether or not this is the problem is as follows.
As you are
using your Mower, at that point when it begins to stall out, loosen
the gas cap so that you release the pressure that is built up in the gas
tank. If the engine begins to regain power, then you know it is a
clogged gas cap. (Simply get a small wire and clear the breathe holes in
the cap.) If the engine dies even after loosening the gas cap, then you
may want to check to make sure the air breather is clean. ( A dirty air
breather can cause the engine to over heat and stall out.)
If none of this seems to help, then it is probably a bad Ignition Coil.
Good Luck!
Jim
When you say it will not rev up to full speed, that sounds to me like a blockage either in the spak arrester in the muffler outlet, or the exhaust port is blocked, or the muffler itself is blocked.
advise doing a compression test with gauge.
could be valve not seating or low compression
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Is it back firing thru the carburetor(Intake) or the Exhaust? Have you checked for a partially sheared flywheel key? Out the exhaust it be burning either too lean or too rich on fuel.
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