backfire

O

olderngrumpier

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• Nov 25, 2018 / backfire

• #1

18 hp b&s lawn tractor wont start seems to be backfiring thru exhaust.

 

Boudreaux In Eunice La.

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• Nov 25, 2018 / backfire

• #2

That's common on those engines ..... How about giving us the Model and type numbers.... If you have the overhead vlalves then they are on the valve cover........

Let us know mon Ami ~!~!

 

O

olderngrumpier

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• Nov 26, 2018 / backfire

• #3

Boudreaux In Eunice La. said:

That's common on those engines ..... How about giving us the Model and type numbers.... If you have the overhead vlalves then they are on the valve cover........

Let us know mon Ami ~!~!

Click to expand...

model 31p777 type 0299e1 replaced sheared flywheel key, it's sheared again, checked valve clearance reset to .005.
looking forward to your reply. thanks

 

Russ2251

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• Nov 26, 2018 / backfire

• #4

Was/is flywheel nut torqued to factory spec?

 

Boudreaux In Eunice La.

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• Nov 26, 2018 / backfire

• #5

I agree with Russ the flywheel needs to be torqued or very tight.... If not it will keep shearing keys everytime....

Put a strap or something around the flywheel then go gorilla on the nut.......

Let us know Mon Ami ~!~!