I have this engine that starts OK but revs up too high and no matter what adjustment I make to the governor spring it is still too high. The revs do drop a little but not enough for a nice idle. If I adjust any more the spring will be too slack. The governor arm is free from any obstruction and the spring is not caught on anything. I was wondering if there was an adjustment to the governor at the governor nut and bolt like there is on Chondas'. The procedure on those is to loosen the governor nut with the throttle wide open and turn the governor shaft fully clockwise (or anti-clockwise to slow it up). Can this same method be applied to Briggs and Stratton Quantum engines? Engine number is 12F802-1975-B1. Some photos (The governor bolt is in the middle photo):
Yes sparker, same thing as the chonda's - loosen bolt, hold the arm at full throttle and turn the governor shaft (from memory anti clockwise). You will know if its the wrong way as if you try to move the throttle butterfly back to idle, there will be so much resistance from the internal governor that it won't (don't force it)
Might want to check that fuel hose - looks like its is about to split
Thanks Tyler. All the ones I get have those cracked hoses that threaten to split at any moment. On the chonda's the movement is very, very small for big differences in RPM. I guess it will be the same here.
Worked perfectly. Just a millimetre of anticlockwise adjustment has taken all the anger out of it. Maybe even a bit slow now. I can fix that with the spring adjustment.
The procedure you are referring to is called the static governor adjustment. It is usually the same for all engines. What you wanting is zero clearance between the governor bellcrank and the governor push pin.
1. Loosen screw holding governor lever to governor bellcrank.
2. Rotate throttle plate linkage from idle position to wide open position. Note direction of rotation of the governor arm attached to the throttle linkage.
3. Place and hold the linkage in high speed position.
4. While holding the linkage in this position, use an appropriate tool to rotate the governor shaft until it stops in the direction noted in step 2.
5. Tighten screw holding governor lever to governor crank. Torque to 35 � 45 in. lbs. (3 � 5 Nm).
6. Before starting engine, manually actuate governor linkage to check for binding.
If memory serve me well and the image is correct on this Briggs you would need a 1/4" 6 point socket to do this adjustment on the bellcrank though a pair pliers will work. I thinking the screw nut is a 5/16" on the governor lever.
Thank you AVB for the correct procedure and also for the right terminology. I fumbled my way through it before I read your post and I had to use a pair of pliers but got the job done.
