Having problems with your Vacuums ?

The tecumseh engine on my snowblower runs for 5 minutes max. then shuts down.how can i fix this?


Answers :

Hi and welcome to FixYa, I am Kelly. I have been working on small engines for over 40 years and this sounds like possibly a fuel starvation problem. Since you did not include an engine model or engine number & size, ths response is quite generic. Remove the float bowl and clean the bowl nut holes. Also with the bowl removed the fuel flow should fill a spary paint can lid 2/3 rds full in about 8 seconds. If you do not have this king of fuel flow then the problems can be:
\015\0121. A clogged fuel filter (If installed)
\015\0122. A glass fuel bowl on the bottom of the fuel tank or in line with the main fuel supply that is full of sediment.
\015\0123. An obstruction in the fuel tank outlet port (rust / debris, grass et al)
\015\012
\015\012While the feul bowl is off remove the main fuel supply hose from the carb and check fuel flow. After you are sure you have a good fuel supply re-install the main fuel hose to the carb AFTER shooting carb cleaner into the fuel manifold connection. Also use carb cleaner and spray into the threaded area where the bowl nut screws into the bast of the carb. This is where the main fuel jet is located. You can use a small nail or tooth pick to clear any obstructions in the jet orifice above the threads of the bowl nut. Also spray carb cleaner into the brass tube in the bottom of throat of the carb (goes to jet orifice)
\015\012
\015\012If you are having ignition failure that is heat or vibration related you will have to find out where the ignition kill wire is chaffing on the engine. If can be anywhere from the throttle control to under the flywheel. You just have to follow the wire from the kill switch point all the way to the ignition coil searching for a bare spot. An tidy electrical tape repair of a chaffed wire is ok. On some snow blowers I have had to cut the wire.. install a piece of shrink tubing, solder the 2 wires together and then skrink the tubing over the repair due to water intrusion from snow.
\015\012
\015\012Sometimes... it is possible for a spark plug to fail as it gets hot. A new plug sould solve this problem. Also check where the spark plug wire passes through the air shroud for any signs of insulation break down.
\015\012
\015\012If you need more help or have any comments just repsond here and I will gladly help you.
\015\012
\015\012Thanks for choosing FixYa,
\015\012Kelly
Have you tried changing the spark plug, replacing the fuel filter, or mabey cleaning the carb wouldn't be a bad idea either.
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The tecumseh engine on my snowblower runs for 5 minutes max. then shuts down.how can i fix this?


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