Welcome to the DoItYourself Forums!

To post questions, help other DIYers and reduce advertising (like the one on your left), join our DIY community. It's free!

Adjusting Valves on OHV Briggs?


amanevents's Avatar
Visiting Guest

Posts: n/a

04-11-03, 05:50 PM   #1  
amanevents
Adjusting Valves on OHV Briggs?

I have a 17.5 HP Briggs on a Sears Craftsman Mower that was smoking bad.
I've been reading the posts for smoking Briggs engines. Most answers pointed to a blown head gasket. I took of the head and that was my problem!

Now I have another problem. I replaced all the parts,gaskets,etc...then bolted everything back.
Tried to crank it and it would "stop" on the compression stroke.
Now I can't seem to get the exhaust valve to get tight on the gauge.

I guess this is from bad valve adjustment? I adjusted them on "top dead center". What is the proper way to adjust the valves?

Got my valve specs from the Briggs web site. (.003-.005 intake, .005-.007 exhaust)

Model 311707
Type 0132
Code 9801282e

Thanks for any help,
Ray

 
Sponsored Links
rogerh's Avatar
Member

Join Date: Nov 2002
Posts: 233

04-12-03, 08:43 AM   #2  
Sounds like the exhaust puchrod is not seated in the lifter.
The way I adjust the valves is to turn it over by hand and when the intake puchrod is up compressing the intake valve spring I adjust the exhaust valve. Then do the same for the intake valve.

 
cheese's Avatar
Forum Topic Moderator

Join Date: Jul 2001
Posts: 16,567
GA

04-13-03, 10:00 PM   #3  
Make sure you didn't lose the cap that fits over the top of the valve stem...they fall off easily when working on the valve train. These engines have a compression release mechanism on the camshaft. I reccomend setting the exhaust valve at .002" with engine at TDC to compensate and avoid this problem. The compression release on some of the earlier models of this engine has a tendency to wear and become ineffective.


"Who is John Galt?" - Ayn Rand (Atlas Shrugged)

God bless!

 
Search this Thread