wondering what the compression on a 11hp b&s is suppose to be?
It is a john deere riding mower but doesn't have much power when you
run the mower.

thanks

"whitt" wrote in message
oups.com...
wondering what the compression on a 11hp b&s is suppose to be?
It is a john deere riding mower but doesn't have much power when you
run the mower.

thanks


I'm not sure about the bigger ones but on the small engines (3-5 HP) they
don't give a specific compression--if the compression is enough to blow your
thumb out of the spark plug hole then it's enough to run the engine. Pretty
sophicated huh?

60-80lbs one will run. 100-125 is very good.

whitt wrote:

wondering what the compression on a 11hp b&s is suppose to be?
It is a john deere riding mower but doesn't have much power when you
run the mower.

thanks

In general you can figure a compression ratio of from 7 to 9 for a
gasoline engine which is roughly 100 - 135 psi. For small engines the
lower end is more typical. As someone else I think noted, they'll run
down to about 60-80 psi, obviously losing power as there's lower
compression.