Recent content by Toroboro

It's not the blade. I recently sharpened and retorqued the blade to the recommended 60 ft. lbs.

Oil used is Penzoil SAE 30. If I remember correctly, there is no stipulation in Toro manual regarding deterent or non-detergent. The knock is audible only under load and gets louder under heavy load. Otherwise its a good running lawn mower. I keep the blade sharpended and it does a great job...

I know that it's not valve noise because it's a knock, not a tap. I am using 20 ounces of SAE 30 oil as per the Toro instruction manual.

I have a Toro 20330 22" rotary mower with a B&S engine. It really runs nice except that under certain load conditions, I hear what sounds like a rod knock. It's been going on for a while and wonder if substituting SAE 40 oil for the 30 thats in there will quiet things down.