Lawn mower governor adjustment

Remove the bracket holding the throttle cable in place. Remove the air filter with a flat head screw driver. If the mower is idling at lower than normal RPM tighten the governor spring by cutting it shorter, this will increase the tension on the throttle and raise RPM. If the mower is idling at higher than normal RPM stretch the governor spring slightly to decrease the resistance placed upon the throttle.

After adjusting the governor spring to the desired amount of resistance test the lawn mower with or without the air filter, if testing without air filter only test briefly. I spent more than an hour trying to find info to work out what sort of tension I needed on both springs from the Briggs and Stratton site some-one had put the throttle spring onto a random hole in the plastic [rocker] arm.

Thanks a clear explanation. Looking at the trees in the background and the practical instructions ,must be an Aussie. Why not just move the speed adjustment lever the thing that the spring is hooked to instead of bending up the spring? It moves to release or increase tension on the spring. Measure spring twice. Cut it once. Or, why cut it at all? Be bk w you in a minute or two. Thanks in advance. To reset the governor: Loosen the nut that clamps the governor arm to the governor rod.

Turn the governor rod toward the full throttle direction until it hits a stop. Hold it there, and tighten the nut again. A couple of things here to point out. One, the governor may not be an internal one, but an external plastic vane around the flywheel.

In a perfect world, an engine governor will evenly match rpm for load required, up to its load limit. On most mower engines, its a much coarser slide than on some finer equipment. The gist of the governor on mowers is to simply push the throttle open more when a load hits it, most noticeably the blades being engaged.

And the happiest medium you can get for the design, is for the engine to operate within a specified optimum range. Everything down to the camshaft design centers around top performance within just a few hundred rpms. After much mucking around I found that the following works wonders for older wind vane governed motors that are worn. Tighten spring 2. Cut 2 cm off the end of the governor vane plastic 3. Chop 5 cm off the end of the exhaust muffler 4. Drill two 5mm holes in the lower end of the crankcase ventilation valve on the inside.

I have nust gad what the mower repair shop called a cable adjustment, as the mower would not shut off. I had to wait for fuel to run out. Thanks Penny. When the throttle cable is in the off position there is a small metal tab that contacts the metal plate the throttle cable is connected too. This is how the mower is turned off. When worn this part can become unreliable and require adjustment. If you move the throttle to the full speed position and remove the air filter so you can see the throttle linkages you should be able to locate the small metal tab that should be contacted when the throttle is in the off position.

When you have located this you should check it is clean and that it is able to contact the moving throttle plate when in the off position. If it does not make contact either the tab is bent or the throttle cable requires adjustment.

Your email address will not be published.Because these engines are on the smaller side, it's important that they don't work at a speed above their capacity.

lawn mower governor adjustment

But they also need to generate enough power to actually work. A governor is what makes this possible. A governor is a device within an engine that allows it to consistently run at its optimum power.

The governor adjusts to changes in terrain, responding by opening or closing the throttle to allow for more or less engine power. A well-working governor is the only way to get the best out of your garden equipment. But sometimes, a governor can become ill-adjusted and need to be fixed. There are two ways you can tell when your governor needs adjustment and one simple way to fix it.

The first is if your engine is consistently running too fast or too slow. The second is if your engine surges or slows dramatically for no apparent reason. The main reason a governor could require adjustment is simply through use over time. If you suspect your governor does need adjustment, you can inspect it manually.

Your machinery must be unplugged while doing this. First, check that the governor spring is attached at both ends and can move freely. You can check this by pulling the throttle lever gently while the machine is disconnected. If the spring has become detached from the governor or the throttle but is still in good condition, it can be reattached. If your spring is damaged or stretched, it will need to be replaced. If your spring seems to be well-attached and in good condition, yet your governor is not working properly, check the arm of your governor.

First, loosen the arm until it is moving freely. Next, open the throttle to full capacity while making a note of which direction the arm moves in when the throttle moves through it.

How to Adjust a Briggs & Stratton Governor

Once the throttle is fully opened, move the governor shaft in the same direction the governor arm traveled. Hold the shaft in its new position and tighten the nut at the base of the arm. Then, release the throttle and check if it can move freely. When not writing, she enjoys pubs, knitting, nature and mysteries. Hunker may earn compensation through affiliate links in this story.

You can then reconnect your engine to power in order to test your newly adjusted governor. Share this article.

Annie Walton Doyle. Show Comments.Log in or Sign up. Sign up now! The U. Chamber of Commerce offered guidance on the loan. Click here to learn more. Messages: The problem is the bullet below that says, "Turn the governor shaft counterclockwise, fully turn the shaft to the end of its travel". Issue 1. The manual picture shows the end of the governor shaft with a screwdriver slot. The governor shaft on this engine does not have a slot. Issue 2. The manual says rotate the governor arm to open the throttle valve then rotate the governor shaft.

For that to happen the governor rod has to be in place on the plate and the plate attached to the engine. With the plate attached to the engine the governor shaft is masked behind the plate.

There's no slot anyway. There is no room to go in back to get between the governor arm and the engine so the governor shaft can't be gripped to do the moving with pliars rather than the "missing" slot in the end of the governor shaft. I think the factory manual lists a procedure that can't be done i.

How do you set the governor? Torque - Governor Arm Clamp Nut: 7. Messages: 11, RestrorobJul 31, Restrorob, You nailed my confusion; I had mentally mated the lower governor link rod and spring to the control plate for some reason. After taking off the control plate I could grab the end of the governor shaft and adjust by the manual. After that the throttle lever worked properly and governor control came back.

I work mostly on snowblowers with Tecumseh engines so hp which are no problem. Thanks for taking the time to read the post carefully to get an understanding of my mistake. Messages: 2. I have readjusted the governor, but at half throttle i lose governor control. I have taken off and went through the steps turn the governor arm and shaft both counterclock wise, then put the spring back on the control panel. Is there something I am overlooking? RestrorobDec 22, This engine has recently been overhauled and I was putting the governor arm back on like tech manual says, turning the governor shaft counter clockwise and governor arm counter clockwise.

I hooked the throttle link from the carb to the end of governor arm when I adjusted the governor, so the throttle valve was fully open.

I then hooked the governor spring from the governor arm to the control panel, then installed the control panel. When I started the engine to set the low rpm the throttle lever was against the slow speed idle screw, set it at rpm.

Then I ran the engine, let it warm up then I went to set the high rpm and about half throttle the engine took off like there was no governor. Now I see the throttle lever doesn't set against the slow speed stop screw. I don't know if this is normal? Not for sure what to look at.Kelly then established an organization specializing in home improvement, including repair and maintenance of household appliances, garden equipment and lawn mowers.

The lawnmower governor is designed to maintain the engine speed set by the throttle lever, regardless of the load imposed. When the engine slows down while cutting through thick grass, the governor opens the throttle automatically, thus maintaining the preset engine speed.

Conversely, when the mower clears the load, the governor compensates by closing the throttle sufficiently to prevent the engine from racing. There are two types of governors: pneumatic governors controlled by a pivoting vane near the flywheel, and centrifugal governors geared to the crankshaft.

Governors require periodic adjustment, but this is a fairly straightforward process. Pull gently on the throttle lever on top the carburetor to ensure that the attached governor linkage moves freely and stretches the governor spring. Inspect the governor spring if vibration has caused it to slip off the linkage.

If the spring has stretched, replace it. If not, reconnect it to the governor linkage. Loosen the clamp bolt holding the governor lever to the shaft protruding from the engine with a small wrench. Move the governor lever back and forth to ensure that it moves freely on the shaft. Move the throttle lever back until it rests against the idle speed adjusting screw. Take careful note of the direction of rotation on the governor arm.

Place a nut driver over the governor shaft protruding from the engine. Turn the shaft in the same direction that the governor arm rotated, until it won't go any further. Tighten the clamp bolt holding the governor lever to the shaft protruding from the engine. Move the governor linkage back and forth to ensure that it moves freely.

Consult your authorized dealer for the recommended maximum no-load speed on your mower; this varies, depending on the engine model. Re-attach the spark plug lead to the spark plug. Wrap the red lead from an electronic tachometer around the spark plug lead and attach the ground wire alligator clip to one of the cylinder head bolts.

Move the mower onto a hard, smooth surface. Start the engine and allow it to run for five minutes at idle speed to reach normal operating temperature. Open the throttle fully and monitor the engine's rpm on the tachometer. If the engine races over the recommended no-load speed, or runs at a reduced rpm, go to Step 5. Loosen the clamp bolt holding the governor lever to the shaft protruding from the engine with a small wrench if you have a mechanical governor. Move the governor lever until the tachometer shows the recommended maximum no-load speed, and tighten the clamp bolt to maintain the new setting.Robin Subaru.

Understanding and Adjusting Your Governor Email: sales smallenginesuppliers. Generally Governors should never need to be adjusted, unless the governor arm has been removed or tampered with.

In the event that they do need adjusted, here is how to do it. One of the most important parts of your engine is the engine governor. An improperly adjusted governor can shorten your engine's life. 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 '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:.

You should do an inspection of the governor linkage and spring before trying to solve either of these problems.

lawn mower governor adjustment

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 adjustment.

See your local repair shop for this!

lawn mower governor adjustment

The other problem that often occurs is governor hunting or surging up and down.The governor linkage on a lawn mower engine, such as a Briggs, is used to adjust the throttle of the mower in order for it to run at a consistent speed. When the lawn mower runs at only low throttle speed or at high throttle speed the governor may need to be manually set or adjusted.

You can adjust a governor linkage on a Briggs engine by first determining where the governor lever is located on the engine of the mower.

Examine the lawn mower and locate the screw that is used to secure the lever for the governor to the governor crank. Place the screwdriver on the screw and turn it counterclockwise to loosen the screw. Move the throttle plate linkage to the wide open position and observe the movement or the rotational direction of the governor shaft.

Turn the end of the governor shaft or lever counterclockwise on engines that have a vertical crankshaft. Turn the end of the governor shaft clockwise on engines that have a horizontal crankshaft. This will move the throttle linkage towards the high speed or full throttle position.

Governor adjustment Lawn Boy 10323 Duraforce 6.5

Turn the screw for the governor level clockwise or to the right to tighten the screw. Use the torque wrench to torque the screw to between 35 and 45 in-lbs. Examine the movement of the governor linkage and make sure it is not binding or getting caught on any obstructions.

Some models of lawn mower have a manual level that you can turn to adjust the governor for the throttle speed of the mower. Cameron Easey has over 15 years customer service experience, with eight of those years in the insurance industry.

Easey earned his Bachelor of Arts degree in political science and history from Western Michigan University. Hunker may earn compensation through affiliate links in this story. Many lawn mowers are powered by Briggs engines.

How to Adjust a Governor Linkage on a Briggs Engine

Step 1 Examine the lawn mower and locate the screw that is used to secure the lever for the governor to the governor crank. Step 2 Move the throttle plate linkage to the wide open position and observe the movement or the rotational direction of the governor shaft.

Step 3 Turn the end of the governor shaft or lever counterclockwise on engines that have a vertical crankshaft. Step 4 Turn the screw for the governor level clockwise or to the right to tighten the screw. Step 5 Examine the movement of the governor linkage and make sure it is not binding or getting caught on any obstructions.

Step 6 Pull the starter cord to start the engine and see if it runs at a consistent speed. Tip Some models of lawn mower have a manual level that you can turn to adjust the governor for the throttle speed of the mower. Share this article. Cameron Easey. Show Comments.Buying Advice. Pro Talk. Photos New media New comments Search media. Log in Register.

lawn mower governor adjustment

Search titles only. Search Advanced search…. Today's Posts. Unread Posts. Search forums. Log in. JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding. Governor adjustment Lawn Boy Duraforce 6. Thread starter stilllearning6 Start date Aug 24, Joined Aug 22, Threads 3 Messages I can touch the white collar and see the gear teeth on it.

Briggs and Stratton Adjusting Governor 3.5HP

I disconnected the spring several times when I had the carb off. Does the entire carb come off again to do an adjustment? Joined Mar 18, Threads 6 Messages My issue is that when I put my finger on the collar to rotate it counterclockwise to tighten the spring tensionI get no tightening.

I want to keep the air vane stationary as I tighten the collar spring.

Lawn Mower RPM Adjustment - Briggs and Stratton engine

What is the trick to do that? OK - I got 3 clicks tighter by ripping apart the skin on my fingertip and shoving extremely hard to rotate collar clockwise. Don't know why the force required to rotate the white rotate collar was so tremendous. Hope this cures all. Update : LB revs high enough after 5 clicks, though now see a drip from fuel bowl gasket. Only took fuel bowl apart 5 times this month. No wonder the gasket is dripping. Drip just appeared for first time today.

Last edited: Aug 24, Joined May 25, Threads 14 Messages Save the headache and spend 50 on a brand new carb on ebay I did that on one of my duraforces I got tired of dickin with it trying to save it so I just got a new one and kept the old one for parts.


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