5hp Briggs and Stratton Compression?

[ShafferNY]

What is the typical compression for a B&S 5hp engine? Mine is barely 50psi. I think that's aweful low. <br /><br />The engine runs fine, but once you put it under load it slowly dies. I've cleaned the tank and carb and it still didn't help. <br /><br />Thanks

 

[ShafferNY]

Re: 5hp Briggs and Stratton Compression?

I put a little bit of oil in the cylinder and it jumped right up to 120psi! I think it's safe to say the rings are shot.<br /><br />Thanks for answering my own questoin.

 

[Grant S]

Re: 5hp Briggs and Stratton Compression?

A valve grind can help too, though it sounds like you are right about the rings.

 

[walleyehed]

Re: 5hp Briggs and Stratton Compression?

Most have a compression relief that keeps the exhaust valve open slightly until rpm is gained after start.<br />Comp test is of no use on a Briggs....leak-down test is the only way to tell, and you have to place the piston in the proper position for that to work.