Animals & Nature1 min ago
Old lawnmower Briggs and stratton
I have an old 3.5bhp Briggs and Stratton powered mower (Has model 520 on it) built in 1980 according to the B and S website -however it doesn't pick up the grass once it has been cut, it has had new blades on it but the grass doesn't reach the cutter box. The engine is fine with no problems. The blades are about 3 inches long bolted to a large round plate which is powered by the motor (10 in diameter)
Any ideas?
Answers
No best answer has yet been selected by lordyboy. Once a best answer has been selected, it will be shown here.
For more on marking an answer as the "Best Answer", please visit our FAQ.There are no gearring mechanism since the Briggs is a direct drive to the cutting blade mower. You say you've had the blade replaced. At the end of the blade (each end actually, the blade should have a sudden bend in it up to abot a 30 degree angle. This will be on the back side, not the cutting side. It will be about 4 inches long. This causes the blade to create a lifting action to eject the cut grass into the reciever. The replacement blade may not have had this feature. Additionally, if grass has been allowed to glue itself to the underside of the deck over time, it will disrupt the airflow neccessary to eject the clippings as well. There couldn't be much else to cause your problem... By the way, here's a picture of the blade I attempted to describe...
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=4366049029&category=29520#ebayphotohosting
I think I'm familiar with the type of blades you discribe lordyboy, if so they are designed to swing out with centrefugal force of the spinning plate and also swing out of the way if it comes into contact with a solid object, like a brick. If this is the case its the plate that causes the down-draft to eject the cuttings.
The blades soon become blunt after a while and may need replacing (bolts too) Always be sure to disconect the spark plug when changing the blades, I've found you can get some extra life out of them by turning them over, as most of the wear is on right-hand side of the blade as it spins clock-wise.
Personally I think the grass rake does a better job anyway, as it gets scarified too! Good Luck.
Where could I buy blades with the raised edges?
Thanks again you have all restored my faith in human nature!!
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