Adjusting Valves on OHV Briggs?


  #1  
Old 04-11-03, 05:50 PM
amanevents
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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
 
  #2  
Old 04-12-03, 08:43 AM
rogerh's Avatar
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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.
 
  #3  
Old 04-13-03, 10:00 PM
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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.
 
 

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