Tech Support banner

Status
Not open for further replies.
1 - 8 of 8 Posts

·
Registered
Joined
·
18 Posts
Discussion Starter #1
I just had a prof. tune up done now I am losing power after the
motor get warm Have only been mowing leaves not very thick
so I am sure its not the load on it
Also when I start it a pretty good puff of white or a light grey
smoke come out muffler.
any ideas? Have been told that I may need a engine rebuild.
I dont know I like to do things myslef but I am more a computer
man myslef.

Thanx inadvance for any help
 

·
TSF Team Emeritus
Joined
·
5,580 Posts
honestly, it almost sounds like you have worn piston rings.

is this motor quite old?

also, there isn't alot of parts on a briggs to have rebuilt, chances are, you could stick it in the shop for a ring replacement job for alot less than you might expect.

one way to tell, would be to run a compression test on it.
 

·
Registered
Joined
·
18 Posts
Discussion Starter #5
In replacing the rings would it need orignial rings or .010
larger rings?
Also if I need the .010 over rings will the cylinder need to be bored
as well?

mower was made in 1994
18hp twincylinder

thanx dkmorgen
 

·
Registered
Joined
·
2,290 Posts
You really need to have the bore honed and checked to determine the piston ring requirement.

At the end of the day, .010" over rings could work, but what really needs to happen is the ring end gap needs to be measured and verified. If someone has a ring gap grinder, you can custom fit the rings for the best end gap as needed, but I would not leave this to a novice. What you do not want to happen is the rings to expand and butt together while the engine warms up and is under load as this can cause the rings to break and possibly damage the cylinder walls.

JamesO
 

·
Registered
Joined
·
14,581 Posts
Closing this old post

BG
 
1 - 8 of 8 Posts
Status
Not open for further replies.
Top