Chuck Jurgens wrote:
I have replaced the rings in a 15.5 hp B&S engine - model
28N707. When I disassembled the engine, I failed to notice
which pusher rod was the exhaust and which was the intake.
One rod has a red band painted on it and is slightly longer
than the other. It also has "rounder" ends than the other
one.

Can someone tell me which is which?

In addition, are the tappets identical or is one for intake
and one for exhaust? If they are different, how do I tell the
difference?

TIA

Chuck

I have a seven year old 14.5HP B&S that makes a knocking sound at
startup, shutdown and everytime the rpm's change. I guess it is getting
ready to explode. The B&S website is pretty nice in providing PDF files
of the exploded parts lists. Now I just need to get brave enough to
tear into this engine.

I don't like the dipsticks on the recent engines. I think it makes it
more difficult to fill an accurate oil level. This may have contributed
to my trouble.

Try checking the mounting bolts for the engine - you might find out
they are loose and the knocking sound is the engine trying to rotate
around the crank as it's running.
Ken.