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I took it apart, but can't get the springs and arms that connect to the carb right. The mower is either on full throttle or too low to keep event an idle.

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  • sg_online Apr 20, 2009

    This is a Craftsman powered walk behind (model #917.377422), with a B & S 6.5 engine (model 143.996510).

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6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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  • 9 Answers

SOURCE: 2005 yamaha yzf 250-unstable idle

I had the same problem, Turns out that my shims were finished, replace the chims and check clearences.

Posted on Mar 12, 2009

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  • 246 Answers

SOURCE: tecumseh engine #143.985510 - carb linkage hook-up

Hello:

The Carbuertor Throttle is Held in the Full Open Position Until the Engine is Started and Running, then the Governor and Spring Work together to Keep the Engine RPMs to the Desired Setting.
The Following is an Explaination on How the Governor System on Small Engines Function.
>>The Governor System behaves like an Unending Tug of War between One of Two Governor Springs, which Pull the Throttle Toward the Open Position, and a Spinning Crankshaft, which Tries to Close the Throttle. When the Load on the Engine Increases - a Typical Example is when you Move your Running Lawn Mower from the Driveway to the Grass - Crankshaft Revolutions Drop. But the Governor Spring is Still Tugging, Causing the Throttle Plate to Open. In Response, a Larger Volume of Air-Fuel Mixture Enters the Carburetor, Increasing Engine Speed to Compensate for the Increased Load. The Crankshaft Speeds Up, and the Tug of War Resumes, until a New Equilibrium is Achieved. With Each Change in Load, the Tension Between the Governor Spring and the Load Brings about a New Equilibrium, known as the Engine's Governed Speed. Neither Side Wins until the Engine is Shut Off. At that Point, without the Crankshaft Spinning, the Governor Spring Pulls the Throttle to the Wide-Open Position. Two Types of Governors are Common on Small Engines - Mechanical and Pneumatic.
Please, Do Not Hesitate, If you Hit a Snag or this Does Not Correct the Problem, I am Here if You Require More Assistance.
Hope this Helps. Let me Know What Happens, Please. May the All Mighty Bless You and Yours. Be Safe and Be Happy. Thanks.

Good Luck

Respectfully

jbridger (John)

Posted on May 13, 2009

redbeard00
  • 957 Answers

SOURCE: I have a craftsman 25 cc string trimmer with fuel

You shouldn't notice a difference if you remove the air filter. So I would replace it. Also if you are using compressed air to clean or blow-out the carb. Be careful, its not recommended and could make it worse.

Posted on May 14, 2009

wadembly
  • 462 Answers

SOURCE: have a 1996 mtd 18.5 hp 46 inch deck riding

it sounds like the needle screw could be bent at the tip if not try turning the screw all the way in & out 1-1/2 turns & try that if i can help further let me know thanks wade

Posted on Jul 05, 2009

  • 85 Answers

SOURCE: Ryobi SS30 Carburetor Problems

Replace thecarb screen, make sure you can see through the screen

Posted on Aug 19, 2009

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1 Answer

Why does my riding mower motor keep suring?


I think you mean surging ? right surging is a cause of only two things , wrong air/fuel ratio due to missadjustment of carb or dirt in carb , other cause is that governor arm spring has fallen off this happens a lot with briggs engines , simple to put it back on the little arm that connects to throttle arm
if dirt in carb is suspect , try adding a 50/50 ratio auto carb cleaner to fuel and running for an hour or so , this sometimes works and sure beats removing carb and cleaning it

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How to adjest the carb on a honda hrr216 self propell mower


Ron:

If the mower starts easily and runs well but surges, the problem is not your carburetor! There is an arm coming from the crank case that links to the carburetor throttle arm with a small rod (the rod has a spring around it). That is your throttle governor. Loosen the nut where the governor arm meets the shaft going into the crank case, set the throttle to full throttle and using a pliers, twist the governor arm (coming out of the crank case to full open (twisting the shaft in the same direction that the governor arm would twist it when you go to full throttle). Tighten the governor arm nut without changing that setting... don't let the governor arm move or let the governor arm shaft (coming out of the crank case ) move or the setting will be wrong. ( I know... a third hand would be useful to hold the governor arm to keep it from moving). You may have to make that adjustment a few time to get it right.

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1 Answer

I have a 6.5 B&S engine on a RYOBI lawn mower That will not come up to mowing RPM. the mower does not have a throttle cable and the spring on the throttle appear to be intach. The engine starts real...


Normally when you move the throttle control on the handle, all that is happening is that governor spring tension is increasing or decreasing pull on the linkage /governor arm. With engine off and plug wire removed, look for a small shaft coming out of the engine with an arm attached. Attached to the small arm will be linkage to the throttle on carb.. So when you move the throttle on the carb with your finger the arm moves also. There should be spring connected to opposite side of governor arm connected to throttle control at the handle or small lever or metal tab. When you incease pull on the spring, the engine will speed-up. Adjust as needed. Good luck

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TOOK CARB OFF TO CLEAN OUT "GUM" FROM SITTING. DURING RE-ASSEMBLT SOLID 1/16" ROD FROM GOVERNOR ARM TO THROTTLE PLATE ARM HOOKED UP OK. THEN I DISCOVERED A VERY LIGHT WEIGHT SPRING AROUND...


the little spring should go through same holes as the linkage it's purpose is to take the slack out of the rod to keep the engine running smooth a broken spring will cause it too run erratically

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Troy built riding mower runs at low speed and


Probably an engine problem.
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Apr 18, 2010 | Troy Garden

2 Answers

Throttle control won't work after i cleaned the carb and disconnected the governor. when i move the throttle handle it does move the throttle control on top of the carb to the high position but when i...


Hi again Ed,
Starting at the carb throttle shaft, your linkage rod (with tiny spring wrapped around it) should be connected directly to the governor's arm. If there's more than one hole in the arm, connect the rod in the upper-most hole.
Now, at the base of the governor's arm is another hole (possibly on a tab jutting from the arm). The main governor spring should be hooked in this hole and then back to the sliding throttle control that moves when the lever on the dash is moved. (This one definitely has a tab and hole.)

The choke cable end hooks directly on the choke shaft and it has intuitive movement. Verify that the choke butterfly closes and opens relative to the cable control on the tractor's dash.

To insure that we only do this procedure ONCE, and we get it right the first time, let's set the internal governor to base-line at this time.

With everything bolted back up, move the throttle control lever on the tractor's dash to full throttle. Then get a 3/8 wrench and a slotted screwdriver and locate the round governor shaft coming out of the engine block. The governor arm attaches to this with a clamping-bolt. You will notice that the round shaft is slotted for a screwdriver as well.
Loosen the clamping bolt slightly with your 3/8 wrench, insert your screwdriver and rotate the round shaft clockwise until it stops. (It has VERY little travel, so turn it both ways to verify that your are at FULL clockwise position.)
Hold screwdriver there and move the governor's arm in the same (clockwise) direction until the carb's throttle is set to WIDE OPEN throttle. Still holding the screwdriver clockwise, retighten the clamping bolt with the wrench.
Next, move the throttle lever on the dash of the tractor to idle and back to full several times and observe the carb's throttle shaft, it should come down from full throttle to idle and back again freely.

Start the engine and be prepared to shut it off if it over-revs.
If it doesn't over-rev, your base-line settings are correct.

By bending the tab on the sliding throttle control (the one that has the main spring attached) you can now increase or decrease spring tension and change top speed of the engine. Do this in small increments and if you have a tachometer for single cylinder's set top speed to 3400-3600 RPM.

Sorry this is lengthy, but as mentioned above, we only want to do this once.

Hope this helps, and feel free to ask away if you need more info!
Dolf-

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2 Answers

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This is called hunting, your fuel-air ratio is not right. Your carb. jets need cleaned

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1 Answer

Putting the carberator back together.


one end to the govenor other end to the throttle on carb

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3 Answers

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