I was wondering how or where I could look up the correct engine speed for the governer on a Tecumseh 10 hp snow blower engine. It is an older Lawnboy ST model 's. It really screams like a devil when opened out but it is still in one piece after over 15 years with me. Governor settings seems to be easy to find out, but actual graphs showing the power curves for TEC engines don't seem to exist, at least I've had no luck trying to find them.
At least with Briggs engines, that information is fairly easy to locate. Makes me wonder if Tecumseh is hiding something, in fact, information like this shouldn't be hidden so deeply, which raises big red flags to me.
Richie Goldrush The liberty of expressions sometimes are ridiculed! Location: St-Hubert Qc. Thanks for the engine speeds. I now have to borrow a tach and see if mine is in that range.
As I understand it, hp is necessary for acceleration, or the ability to increase speed. Torque measures the ability of an engine to maintain a set speed given an increasing load.
That is why diesel engines high torque - low hp can haul heavy loads up hill with out losing much speed but are very slow in accelerating to a given speed. At least that's my understanding of it all. I'll have to pull the shield off to see but I seem to remember the governer adjustment mechanism is just a spring-loaded phillips screw.
I now need a tachometer to measure the rpms. Brian Ben07 The more you know about something, the more you find there is to know. Quite possibly true. They got to justify their existance. Don't believe anything the EPA slams down your throat.After that, slowly back out the screws in a counterclockwise direction to the pre-set position. Different types have diverse style of idle adjustments; the series 1 carburetor comes with two varying styles of adjusting needle for the idle.
The adjustments for both the system are pretty much the same; however, the drops off point indicate may not be as noticeable. Upon starting the engine, initially allow the engine to warm up to a normal working temperature. Once the engine picks up the speed and high or fast speed has been set, it is then advisable to turn on the main mixture adjusting screw to the clockwise slowly-slowly till the point when engine begins to run inconsistent and note down carefully the position of screw at this point of time.
Repeat the same in reverse direction and now turn the adjusting screw out in counterclockwise direction until the engine reaches a point from where it begins to run in an erratic manner. Now to find out best setting point, turn screw to the clockwise direction towards midway between these two positions and that would indicate best setting point adjustment.Fix tecumseh snowblower from surging
If it is necessary, the main adjustment can be done with the engine in a loaded condition. Caution: It has been advised to never operate the engine after removing the covers and guards. There can be some really severe injuries resulting from rotating parts.
Be cautious and keep your body parts, hands, hair, clothes, and accessories at a distance from all the moving parts. To put the engine under the load condition, carefully engage cutter deck, impeller and various other driven parts. Repeat it until the engine continues to idle smoothly.
One of the most important things to do is to ensure correct RPM adjustments. After setting governed idle, in the next step it is time to set the non-governed idle. To set the non-governed idle, push bottom part of the governor lever carefully in an opposite direction away from controlling brackets in such a manner that the throttle lever comes into contact with the idle speed screw.
At this position, hold the lever and carefully turn the idle adjusting screw in clockwise direction to increase or in counterclockwise direction to decrease the engine idling speed. Make sure that the setting of carburetor screw must be set either RPM below the tab or at the governed idle setting. Carefully turn both the main screw as well as idle mixture adjusting screws to clockwise direction finger tight. Be careful while tightening the screws as over-tightening may lead to damage of the tapered portion of needle.
Now turn back the both the screws out counterclockwise into pre-set figure as shown in the chart.Click here to learn more. Log in or Sign up. Sign up now! Read the timely article from Turf addressing this question.
Messages: 5. I am new here so I hope I placed this question in the right spot. It is a 5 horsepower vertical crankshaft engine. Sears Craftsman Model number and serial number My Tecumseh manual does not cover this older engine.
Google has not helped me so far. Does anyone have access to the actual RPM numbers of older Tecumseh engines? I really don't want to launch a rod by guessing. Thanks for checking. Jim in IllinoisSep 9, Messages: 13, Can you post the Tecumseh Engine number?
Walker56Sep 9, Sorry, I wasn't able to get the Tecumseh model number from the manual I have. It just doesn't go back that far. Maybe someone has an older manual??? From what I read here, you have an LV50 engine. One is for the L head and the other is for the Vector LV series.
Tecumseh 3 to 11 HP 4-Cycle L-Head General Information
See if this helps you. Last edited: Sep 9, Thank you so much for checking but the 3 to 11 hp manual is what I have and it does not cover this older engine. My engine has a crank start not a rope. It states micro fiche number 30 has the rpm numbers.
That is dated technology right there. We have to go back farther in the time machine with this one. Any ideas? Breezmeister likes this. A library in a nearby town has the Microfiche viewer for me to use. Hopefully 30 goes back far enough to cover this early engine. The lengths we go to when restoring an old machine! Thanks Walker56 for giving me the info.
Jim in IllinoisSep 10, Jim, good luck. Please post back once you view the microfiche. Walker56Sep 10, Well, I don't think my card 30 is old enough.Click here to learn more. Log in or Sign up. Sign up now!
Read the timely article from Turf addressing this question. Messages: 2. I have two 40 year old snowblowers with Tescumseh engines, one a 7 horse power, the other a 6 horsepower. What are the maximum safe RPMs for the engines? I had an engine that went to a high RPM because the governor failed. Someone said that the high RPM could have stretched the connecting rod. What is the likelihood of that happening?
How would it affect the engine operation, assuming the rod does not break? Thanks for any responses. Messages: 1, Basically anywhere over and you're in danger of throwing a rod through the side of the block. Smalltimer1Jan 1, Messages: 2, I've never heard of stretching a rod. I dout that it done any real damage to your engine.
If you ran it very long faster than it would throw a rod through the block like smalltimer said. Travis FollowellJan 1, Some older engines are governed at I do have a Tecumseh L-Head manual. Smalltimer, just wondering but what engines does your manual cover. All the single cylinder L head engines and if so back to what year? About how much do they cost and the part if its not too much trouble.Tecumseh manufactures a variety of small engines for use in lawn and garden products and in small industrial equipment.
To protect the engine and keep it operating at peak efficiency, Tecumseh engines are equipped with a governor. If the engine over-revs, the governor will cut back the throttle. Conversely, if the engine is under a heavy load, the governor will increase the throttle to compensate.
To adjust the governor on a Tecumseh engine, you'll need only some basic hand tools. Before beginning the adjustment of your machine's governor, you first need to identify it.
The governor mechanism keeps your lawn mower moving at the same speed regardless of the load request. Akin to the cruise control system in your car, the governor is a critical component of a lawn mower.
There are three types of governors: mechanical, pneumatic and electronic. Yours will appear as a plastic arm or flap and be located underneath the engine housing. You should be able to remove both the engine housing and governor itself using pliers and a screwdriver. Be sure to disconnect the spark plug whenever you work on a small engine to prevent the engine from firing accidentally while you work.
Remove the spark plug wire from the tip of the spark plug and secure it away from the spark plug. Inspect the spring between the governor and the throttle lever. If it appears to be stretched or worn, replace it with a new governor spring.
Rotate the throttle lever so that the throttle is in the wide-open position for when the engine is running at top speed. Notice which direction the governor arm moves as you rotate the throttle lever. Loosen the screw at the base of the governor arm with a screwdriver. Rotate the governor arm in the same direction as it moved when the throttle lever was moved to wide open.
Hold the governor arm in this position with one hand and tighten the screw at the base of the governor arm with the other hand. Re-connect the spark plug wire to the spark plug and start the engine. Position the throttle to halfway open and let the engine warm up for about five minutes. Open the throttle to the wide-open, full position and listen for any cut-out in the engine. If it runs smoothly, back the engine off to idle and listen again.
If there is any revving or cutting-out of the engine, repeat the previous steps. Chris Baylor has been writing about various topics, focusing primarily on woodworking, since Hunker may earn compensation through affiliate links in this story.
Share this article. Chris Baylor. Show Comments.Tecumseh engines are built for use in lawnmowers and snow blowers. Common problems that affect the governor on a Tecumseh engine are that the engine runs either too fast or too slow or that the engine surges or hunts.
Some repairs should be left to professionals, but diagnosing the problem with the governor is an easy process for most do-it-yourselfers. The governor shaft on a Tecumseh engine should face the same direction as the governor arm to open the throttle.
Adjust the governor by loosening the screw on the bottom of the governor arm. Push the governor arm until the throttle is wide open. Turn the bottom clip that is connected to the governor shaft counterclockwise to set the governor shaft on top of the governor spool.
Replace the screw on the bottom of the governor arm. If the governor utilizes air vanes, then make sure they remain clear of debris to ensure that the proper amount of air flows through the engine.
Check the linkage and spring of the governor to ensure that they operate freely and are not stretched or damaged. Check that all free play is removed from between the carburetor and spindle of the governor's static adjustment. You can check this when you move the air throttle to full open from idle to see how the governor shaft moves.
If the governor shaft moves clockwise, then loosen the clamp screw and turn the shaft clockwise. Replace the clamp screw and check the engine to ensure that the air throttle moves freely from idle to full open. With the engine at idle, move the governor lever to open the throttle and push the governor arm back toward idle. Remove the governor spring. If the engine continues to overspeed or has no push toward idle, then the damage may be in motor, static adjustment or other internal parts.
In this situation, take the engine to a professional for repairs. If the governor surges up and down, then the problem may be a plugged carburetor, a plugged idle circuit or a worn linkage. If you check these components and see that they work properly, then the set of the governor may be too sensitive.
This means that it reacts too quickly and overcompensates for the speed. Move the spring to a hole in the governor arm that is farther from the shaft to decrease sensitivity. Chris Passas is a freelance writer from Nags Head, N. He graduated from East Carolina University in with a bachelor's degree in journalism.
He has written online instructional articles since September Hunker may earn compensation through affiliate links in this story. Share this article.
Chris Passas.Small engines are used in everything from lawnmowers to motorcycles. One of the most versatile and rugged is the Tecumseh motor. Easy to use and easier to maintain, this motor can run for a long time. Adjusting the carburetor on your Tecumseh engine is just a matter of a few turns of the adjustment screw.
Tune-ups are very simple. You will be able to adjust your Tecumseh carburetor in just a few short minutes and have your engine running smoothly again. Locate the adjustment screw on your Tecumseh engine. It should be on the side of the barrel of your carburetor. Turn the adjustment screw clockwise until the needle valve is closed and seated at the bottom. Make sure you do not overtighten or you will damage the valve.
Turn the adjustment screw counterclockwise until the engine is about to stall out from too much fuel. Turn the adjustment screw back clockwise to the midpoint between too little fuel and too much fuel. This article was written by the It Still Runs team, copy edited and fact checked through a multi-point auditing system, in efforts to ensure our readers only receive the best information.
To submit your questions or ideas, or to simply learn more about It Still Runs, contact us. Step 1 Locate the adjustment screw on your Tecumseh engine. Step 2 Turn the adjustment screw clockwise until the needle valve is closed and seated at the bottom. Step 4 Turn the engine on and let it warm up about five minutes.
Outdoor Power Equipment (Lawn Mowers, Snow Blowers, Chain Saws and more) Discussions
Step 5 Turn the adjustment screw clockwise until the engine is just about to die. Step 6 Turn the adjustment screw counterclockwise until the engine is about to stall out from too much fuel. About the Author This article was written by the It Still Runs team, copy edited and fact checked through a multi-point auditing system, in efforts to ensure our readers only receive the best information.
Photo Credits engine of a motorcycle image by terex from Fotolia.