What is the adjustment procedure and what tools will I need?

I found a nice pic here: Briggs & Stratton Intek Plus OHV engine question. - MyTractorForum.com - The Friendliest Tractor Forum & Discussion Board and Best Place for Tractor Information on the web!!! (http://www.mytractorforum.com/showthread.php?t=77279)

From the looks of it, you'll need a wrench, torx bits and a feeler gauge set.

Based on car experience, the nut is a lock and the torx screw adjusts the clearance.

You generally make sure the size that you need justs slips under the rocker arm. Also check the larger size and see if it does not.

Te problem is many engines are set 1/4" ATDC. In other words, both valves are set when the piston is at 1/4" AFTER Top Dead Center on the compression stroke.

(Corrected to After TDC per crigby)

A 4-cycle engine has 4 strokes. Intake, compression, power and exhaust, so you know what the valve position is supposed to be in each stroke and the direction that the piston is traveling.

If you use a dial indicator in the spark plug hole, esentially measuring the distance to the top of the piston, you can determine the piston location.

This is a video using the standard way of adjusting valves where they are adjusted when they are the loosest.

YouTube - Lawn Mower Repair Valve Adjustment V-Twin (http://www.youtube.com/watch?v=hGkn0jR9RJM&NR=1)

There may be specification info on the above referenced website.

Hi,
A correction here. That should be with the piston down 1/4" after top dead center and the locking set screw in the center of the adjuster nut is a T20 torx.
Peace,
Clarke

Thanks crigby. Corrected. And that makes perfect sense. BTC woukd still be in the compression stroke.

Do you have the valve clearance values?

Hi,
Sorry for not saying, 0.004" on each.
Peace,
Clarke

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As much as 1/2 price. Some don't give an idea of what the measuring range is.

Magnetic mounting bases may be separate.