Engine Knocking

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  #1  
Old 03-27-03, 04:17 AM
boman's Avatar
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Briggs knock

I hope this is a general enough guestion to not need a model number. Five hp Briggs push mower. Runs fine, but seems to have slight knocking when in heavier grass. I'm not talking about bush-hogging, just high grass. Like it gets a knock when a heavy work load is placed on it. Any comments?

Thanks.
 
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Old 03-27-03, 07:47 AM
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Boman:
Have you checked the blade. If a blade becomes loose it will sound like a engine knock. There can also be a carbon build up on the piston that will give you a knock. Then the obvious is check the oil.
 
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Old 03-27-03, 09:39 AM
Oil Doc
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And don't forget to check engine mounting bolts
 
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Old 03-27-03, 08:15 PM
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And if the previous suggestions don't lead you to the problem, if this is a newer engine (quantum)...well, that's pretty common. I see a lot of these things with a rod knock, but they run surprisingly long like that.
 
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