i need help on 12 hp briggs synchro balance engine - HobbyTalk
 
LinkBack Thread Tools Search this Thread
post #1 of 7 (permalink) Old 12-10-2008, 09:50 PM Thread Starter
Member
 
Join Date: Aug 2008
Posts: 38
i need help on 12 hp briggs synchro balance engine

hi guys . i have a 12 hp synchro balanced model 281707 type 0411 briggs . engine starts right up but the whole engine vibrates like crazy , i unbolted the engine off the riding mower frame and took the pan off . i could see the side of the outer counterweight was rubbing on the side of the crankshaft gear . counter weight has a lot of movement toward the flywheel and the bottom pulleys, there is a miniature conn. rod look alike holding the weights and at the end of the rod there is nothing holding it thats where the weight movement is coming from , is there suppose to be a bolt there? at the other end of the rod there is a long bolt that thru from the outer - rod-and inner weight. but no bolt at the other end of the weight rod. i went to the part list on www.briggs & stratton and it does not show a bolt there.
CHUY68 is offline  
Sponsored Links
Advertisement
 
post #2 of 7 (permalink) Old 12-11-2008, 07:34 PM
Elder Statesman
 
paulr44's Avatar
 
Join Date: Oct 2008
Location: NewJersey
Posts: 1,205
I couldn't find an exact pic of your model & type engine, but perhaps this will help:
http://www.tpub.com/content/recovery...01-14P_264.htm
paulr44 is offline  
post #3 of 7 (permalink) Old 12-11-2008, 08:58 PM Thread Starter
Member
 
Join Date: Aug 2008
Posts: 38
thanks paulr44 , on the illustrations you sent me they dont show a bolt holding the other end of the counterweight link. i probably just need the whole counterweight assembly since they are showing some wear where the weight rubs on crankshaft. where is a good place to buy this parts? anybody out here got a counterweight assembly for sale???
thanks for your time
CHUY68 is offline  
post #4 of 7 (permalink) Old 12-13-2008, 09:34 AM
Top Dog
 
30yearTech's Avatar
 
Join Date: Sep 2006
Location: Central Texas
Posts: 6,085
If there is wear on the counter weights, there probably is also wear on the crankshaft bearings that operate the weights. This may not be a cost effective repair for your engine.

You can order parts from many sources on line, just do a search for Briggs and Stratton parts.

You can look at an illustrated parts list for your engine here:
http://www.briggsandstratton.com/mai...nav3&subMenu=3

Just use your model number and the first 4 digits of your type number to locate your engine.
30yearTech is offline  
post #5 of 7 (permalink) Old 12-13-2008, 05:35 PM Thread Starter
Member
 
Join Date: Aug 2008
Posts: 38
Hi Guys , Thank You For Your Time On Answering My Question , Im Wondering If I Take The Whole Counterweight Assembly Completely Off The Engine, And Run It Without It. What Do You Think? There Is Wear To Where The Counterweghts Hangs On The Cranckshaft, (maybe The Bearings U R Talking About 30yeartech.)
CHUY68 is offline  
post #6 of 7 (permalink) Old 12-13-2008, 11:26 PM
Top Dog
 
30yearTech's Avatar
 
Join Date: Sep 2006
Location: Central Texas
Posts: 6,085
I have never run a syncro balanced engine without the counter weights. I suspect it will vibrate about as bad as with the weights in their current condition. You will however not have to worry about the weights slinging loose and blowing the bottom of your engine out!
30yearTech is offline  
post #7 of 7 (permalink) Old 12-14-2008, 05:43 PM
Elder Statesman
 
paulr44's Avatar
 
Join Date: Oct 2008
Location: NewJersey
Posts: 1,205
I've seen Kohler M16's run without the balance gears - not terrible but noticeable. Never ran a briggs without it..
Paul
paulr44 is offline  
Reply

Bookmarks

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the HobbyTalk forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Show Printable Version Show Printable Version
Email this Page Email this Page
Search this Thread:

Advanced Search



Posting Rules  
You may post new threads
You may 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
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome