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Engine backfiring

#1

B

Blacktrain11

Greetings;
I have a Tecumseh (ohsk120 222019e) mounted on a wood spliter. The engine will run perfect for about 1 hour and 10 minutes. Then it will start to miss and sputter and it will start to back fire until it quits. If you let it sit for a half an hour you can start it up again and it will run perfect again for about 1 hour and 10 minutes and it will start to miss and sputter and start backfiring again until it quits. You can repeat this all day long and it does this over and over. Any help would be greatly appreciated. Thanks!!!


#2

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Pumper54

How is fuel feed to the engine, any chance the fuel line is getting hot and "vapor locking" on you? What kind of cooling does the engine have, air cooled engines like lots of air blowing over them when they are running.
Tom


#3

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bertsmobile1

That is the signature failure mode of an ignition module going bador condenser failing if this a points engine.
Confirm this with an in line spark tester.
If the tester lights up while the engine is dieing then you have a fuel / cam problem
If it flashed iratically in harmony with the engine missing then you have an ignition failure.


#4

0

0352

Blacktrain11 said:
Greetings;
I have a Tecumseh (ohsk120 222019e) mounted on a wood spliter. The engine will run perfect for about 1 hour and 10 minutes. Then it will start to miss and sputter and it will start to back fire until it quits. If you let it sit for a half an hour you can start it up again and it will run perfect again for about 1 hour and 10 minutes and it will start to miss and sputter and start backfiring again until it quits. You can repeat this all day long and it does this over and over. Any help would be greatly appreciated. Thanks!!!
Click to expand...

It might be that once the ignition coil or condenser heats up it causes a misfire.


#5

0

0352

bertsmobile1 said:
That is the signature failure mode of an ignition module going bador condenser failing if this a points engine.
Confirm this with an in line spark tester.
If the tester lights up while the engine is dieing then you have a fuel / cam problem
If it flashed iratically in harmony with the engine missing then you have an ignition failure.
Click to expand...

Hey thanks, it doesn't cost very much to replace both. That's what I'll do.?


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