Welcome to the DoItYourself Forums!

To post questions, help other DIYers and reduce advertising (like the one on your left), join our DIY community. It's free!

Engine Knocking

boman's Avatar

Join Date: May 2001
Posts: 487

03-27-03, 04:17 AM   #1  
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?


Sponsored Links
rogerh's Avatar

Join Date: Nov 2002
Posts: 233

03-27-03, 07:47 AM   #2  
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.

Oil Doc's Avatar
Visiting Guest

Posts: n/a

03-27-03, 09:39 AM   #3  
Oil Doc
And don't forget to check engine mounting bolts

cheese's Avatar
Forum Topic Moderator

Join Date: Jul 2001
Posts: 16,571

03-27-03, 08:15 PM   #4  
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.

"Who is John Galt?" - Ayn Rand (Atlas Shrugged)

God bless!

Search this Thread