Register free!
Search
 
     

The Green Industry's Resource Center


Click for Weather
Reply
 
Thread Tools Display Modes
  #1  
Old 10-27-2011, 09:22 PM
Central Island Lawn Central Island Lawn is offline
LawnSite Member
 
Join Date: Jan 2009
Location: Nanaimo, BC, Canada
Posts: 50
Briggs motor woes

Hi all
I picked up a very inexpensive Snapper Rider. It's small, 25" cutting deck, but it's a really fun machine and the smaller size is easy to get in to smaller spaces and it turns on a dime. It's an older unit and the 6 HP Tecumseh was a POS, and I can't get parts for it anymore, so I picked up a used 12 HP Briggs motor for about $200. I have this problem where the engine will start great when cold, run for about 30 to 60 seconds. Then the governor will take over and start adjusting the throttle, engine RPMs will drop and eventually the motor will cut out. The carburetor that was on there would leak fuel, even with a new carb kit, so I replaced the carb. I've also replaced the ignition coil, spark plug, and re-wired the starter. What I have not done is hook up the alternator to the battery, which shouldn't make a difference other than recharging the battery. I also have not replaced the air filter, which seems a little too obvious. I'm going to replace the air filter tomorrow, but I wonder if there is something else that I should consider. The engine does get hot fairly quickly and that is when it shuts off.

Thanks

PS. The mower cost me $200, $200 for the engine, and $200 for a new carb.
Reply With Quote
  #2  
Old 10-27-2011, 09:55 PM
Restrorob's Avatar
Restrorob Restrorob is offline
LawnSite Fanatic
 
Join Date: Apr 2005
Location: Show'n my truck off !
Posts: 10,574
$200 for a carb ? Dayum !

Can you post the engine model and type numbers ?
__________________
Quote:
Originally Posted by piston slapper View Post
You never learn anything until you admit you don't know it all...

"Why go out preserved when you can go out beat up, worn out, sliding in sideways screaming, Holy Sh!t What A Ride" !!!
Reply With Quote
  #3  
Old 10-28-2011, 01:19 AM
Central Island Lawn Central Island Lawn is offline
LawnSite Member
 
Join Date: Jan 2009
Location: Nanaimo, BC, Canada
Posts: 50
The engine model and type is:
281707-0412-01
Reply With Quote
  #4  
Old 10-28-2011, 09:09 AM
dutch1's Avatar
dutch1 dutch1 is online now
LawnSite Silver Member
 
Join Date: Dec 2004
Location: Jayhawk
Posts: 2,168
What the code number--the last of the three engine numbers. The first two digits of the code will indicate the year of manufacture. Judging from the carb on that engine, it's likely an early to mid 90's engine or possibly earlier.

A used engine is most always a gamble unless you know it's history, observed it run or have done some elementary testing.

Unfortunately, the train has already left the station and you've got $400 wrapped up in an engine that isn't doing the job.

Where to start?

Check the compression, cold and hot. Low compression could mean several things--valve problems, cylinder/ring wear, head gasket leak

Adjust the governor properly.

Check for any possible intake leaks.

Don't spend any more money on it until you know it can be made satisfactory within the limit you can afford to invest. Internal engine work can get pricey unless you can perform the work yourself.

Just a few random and elementary thoughts. Rob/others will likely come back with some additional suggestions as well.

Good luck.
Reply With Quote
  #5  
Old 10-28-2011, 03:08 PM
Central Island Lawn Central Island Lawn is offline
LawnSite Member
 
Join Date: Jan 2009
Location: Nanaimo, BC, Canada
Posts: 50
Something I would like to add:
I just ran it. It started great, first crank all the time without any choke on low throttle. I left it to run at idle, once it warmed up it was a little rough but kept running. It didn't die until I added throttle and let it run at full throttle for a few seconds. Running at lower throttle seems to be okay though.
What are the chances that it's the air filter?
Reply With Quote
  #6  
Old 10-28-2011, 08:23 PM
piston slapper's Avatar
piston slapper piston slapper is offline
LawnSite Platinum Member
 
Join Date: Mar 2010
Location: Tampa Fl
Posts: 4,008
What does the sparkplug look like?
Clean or oily or black and sooty?
Posted via Mobile Device
Reply With Quote
  #7  
Old 12-03-2011, 10:38 PM
jdunk jdunk is offline
LawnSite Member
 
Join Date: Apr 2011
Location: pontiac mich
Posts: 20
carb issue out of ajustment starts with out choaking running rich idel circuit?
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump





Powered by vBulletin® Version 3.8.6
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Copyright ©1998 - 2012, LawnSite.comô - Moose River Media
All times are GMT -4. The time now is 05:58 PM.

Page generated in 0.06879 seconds with 7 queries