Question about Garden
Need to know how to adjust valves on a 12 horsepower overhead valve engine
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Posted on Jan 02, 2017
Hi 1st remove the rocker cover and spark plug
hold a long skinny screwdriver down the plug hole and wind the engine by hand until you get top dead centre (NOTE WATCH ROCKERS) first the intake valve will open then close when it closes the piston should be coming up to top dead centre and both valves should be closed and the rocker loose setting should be 0.004 thou you need to undo the locking screw down the centre of the adjusting nut then you can adjust to setting, (DONT FORGET TO DO THE LOCKING SCREWS BACK UP) reassemble
Posted on Jul 27, 2009
If it has a float type carb, open it 1.5 turns. If it has a diaphram open it one turn. If it has a Walbro carb, there is no adjustment. Once you get the engine started you may adjust the carb to fine tune. Open until it begins to lose RPM's then close until it starts to lose RPM's. Return to a point between the two. Good luck...Lee
Posted on Sep 05, 2009
adjustment with 4000 feeler gauge
adjust top valve when the bottom valve is fully compressed and than with the top valve fully compressed adjust the bottom valve the same way.
very easy But remember to losen the center tork screw before adjusting the rocker arm nut
Posted on Apr 02, 2010
I believe this does have comression release. Make sure you're rotating the motor in the correct direction, as I think the compression release only works in one direction. Adjust the valve to .004 with the piston at TDC make sure it's on the power stroke. Turn the motor till intake opens, then when you continue to rotate crank, unitl valve closes and piston gets back to TDC. Adjust both valves to .004. Then do the other cylinder the same way.
Posted on Jul 21, 2010
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