Where does the spring attach on the governor to adjust speed on a lawnboy 10313 SN7911368 Model built in 1997?

To properly connect the governor spring on the throttle assembly of a Rally 5 horsepower motor, follow these general guidelines. Begin by locating the governor arm, a metal lever connected to the throttle assembly near the carburetor or intake manifold. Next, identify the governor spring, a coiled spring with a hook or loop on one end. Attach this end to the designated hook or anchor point on the governor arm. Then, find the appropriate anchor point on the engine block or throttle assembly and connect the other end of the spring, ensuring a secure attachment that provides tension when adjusting the throttle. If needed, adjust the tension by repositioning the attachment points. Remember that specific instructions may vary based on the Rally motor model, so consult the motor's manual or contact the manufacturer for accurate guidance tailored to your engine.

It is many years since I laid hands on a Lawnboy mower so I am not really familiar with the model but the principle of the air vane governor is fairly standard.

Briefly, the air vane and carb throttle butterfly is connected together and biased by a spring into the basic position where the throttle butterfly is open and the air vane is close to the fan. When the engine is running the air vane is forced away from the fan closing the throttle until engine revs/air draught and spring tension is in equilibrium.

The throttle control is connected to the linkage via a spring and increasing the engine speed increases the spring tension/air vane bias towards the fan, thus opening the throttle butterfly until the increased air draught moves the vane and tends to close the butterfly until a new equilibrium is reached.

the spring goes from the governor arm to the carb. you will see a bunch of holes in the governor arm so look for the wear marks around the hole that was previously used

Yes, you can but the speed should be set with a tachometer. Your local dealer can make this adjustment for you.

ck. governor linkage connections

did you have the governor arm off of the motor

Hi and welcome to FixYa. I am Kelly

Usually when you have a lower voltage output that is yet above 150 VAC the problem is as simple as the engine is no longer running at full speed. This could be caused by binding carb or governor linkages but more often than not the Governor adjustment screw has backed off over time causing the engine to gradually slow so the output voltage drops. The user does not notice it so much until the output drops more than 15% and you notice dim lights... slower running equipment etc.

Look for a circular plate / governor speed plate near the base of the governor lever but off to one side that has a spring that attaches to the governor lower end of the governor. There should be a screw with a locking nut. Loosen the nut and turn the adjusting screw clockwise to increase engine speed. (You may have to barely loosen the pivot nut on the governor speed control adjustment plate to make the speed adjustment.... tighten when done with speed adjusment) Watch your output voltage and adjust the voltage to 225 VAC with NO LOAD. The voltage will drop as loads are added. Make sure to tighten the lock nut on the adjusting screw or in a matter of an hour you will have low voltage again from engine speed dropping. What ever you do.... DO NOT adjust the governor arm base attach point where it attaches to the engine.

Just so you know a weakened governor spring can cause the speed drop also. If the speed keeps dropping with extended use, you may have to change the spring that goes from the lower end of the governor arm to the governor speed adjustment plate.

Thanks for choosing FixYa,
Kelly

Some ATCO carburettors have more than one hole for attaching the throttle cable to the governor pivot, which will allow some variation of the speed setting by moving to a different hole.
Just before the throttle cable reaches the governor pivot it passes through a metal lug (separated from the pivot by a spring) here there is threaded screw on the throttle cable - loosen or tighten this to adjust running speed.
There is also a throttle stop adjusting screw which on the side of the carburettor which you can adjust to set the idle speed.

One of the most important parts of your engine is the engine governor. An improperly adjusted governor can shorten your engine's life. If engine speed is not controlled, the engine will destroy itself. Never run an engine over speed, especially without a load attached to it. Even for a short period of time it can cause catastrophic failures, like blowing the magneto magnet into 100's of little pieces. Over speeding is something that needs to be taken care of immediately, because it can be a real hazard with metal coming loose at high speed. This page will explain how to adjust the mechanical governor on Briggs and Stratton and Tecumseh Engines.
First, let's understand a little more about governors and why they may not be working right:
Most complaints about governors fall into two categories:

1. Engine runs too fast or too slow.
2. Engine surges or hunts.

You should do an inspection of the governor linkage and spring before trying to solve either of these problems. Make sure everything is operating freely and the spring is not damaged or stretched. Also, check the governor static adjustment to see that all free play has been removed between the spindle and carburetor. The best way to do this is to move the throttle from idle to full open and note the way the governor shaft moves. If it goes clockwise, then loosen the clamp screw and with the throttle wide open turn the shaft all the way clockwise and re-tighten the nut. Make sure the throttle moves from idle to full open freely after making the adjustment. Refer to the engine repair manual for exact adjustment procedures.
After you have made the above check, restart the engine and see if the governor now operates correctly. With the engine at idle, move the governor lever with your finger to open the throttle and it should push the arm back toward idle if working properly. One way to do this test is with the governor spring removed. If it still over speeds or has no push toward idle, you probably will need to have the internal parts checked inside the motor or recheck the static adjustmen

take the air filter off the spring is attached to the govenor rod to a fixed arm once attached the arm can be bent to tighten the spring or bent the other way slow the speed tighter the spring faster the speed there is another rod attached to the govenor rod to the throttle