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TORO PH-XT675-2011 adjust speed

Engine is racing to fast

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  • John Robertson
    John Robertson May 08, 2014

    Hi Larry Brister, I want to help you with your problem, but I need more information from you. Can you please add details in the comment box?

  • John Robertson
    John Robertson May 08, 2014

    Hi. You dont say whether its too fast while idling, or runs too hot when at full speed. Ill do some research on the engine while Im waiting on your answer.

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Posted on Jan 02, 2017

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SOURCE: engine running at excessivly hi speed

Check that the governor spring is properly installed.

Posted on Jul 04, 2009

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Dolfoff
  • 148 Answers

SOURCE: craftsman Trimmer/Edger 4.0 HP Engine races...

Most likely, the mechanical governor is damaged inside the engine. If you have tools, a sense of adventure, and lots patience, this can be replaced for a modest cost in parts.
If not, take it to a reputable repair shop.
The governor replacement involves engine removal, opening the crankcase, lots of parts-cleaning, and attentive reassembly.
Would be happy to help you if you decide to tackle this repair.
Hope this helps.

Posted on Oct 04, 2009

  • 5603 Answers

SOURCE: Engine races

One thing I read is that on some the arm from the govenor shaft can slip on the shaft so the arm is rotated on the shaft to a point the govenor isn't even in contact with the internals driving the shaft. On those units a clamp bolt becomes loose causing the problem.

I suspect if there IS an internal problem it is severe and one would have to disassemble the engine before operating it lest damage occur from loose parts.

Posted on Mar 26, 2010

  • 2 Answers

SOURCE: PH-XT675-2011 starting trouble

You've let the engine sit too long. It needs carb repair, the fuel has gunked up. Carb needs to be removed and serviced :)

Posted on Apr 02, 2013

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1 Answer

How correct toro l/mower engine racing


Check the idling setting screw is not holding open the throttle butterfly common fault to fix if the engine races esp when no load is applied the idle throttlexpostion is to high thus the engine runs faster at idle turn the screw located on either the butterflyistelf so less screw threes is against the carb body this should start lowering the idle speed of the engine it should be around the 900 RPM approx for idling and top rev of 3500 at full throttle a rev counter is displaying a extra high rev count the it's the oil governed at fault or malfunctioning or sticking this will cause and engine to race badly to the point of engine destruction eventually
You may need to adjust the movement of the governing leavers etcetera best done by qualified servicing personnel a lawnmower mechanic etc

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1 Answer

Why is my engine running fast and I am hearing a knocking noise in the engine?


If the engine races and wont idle down by the throttle there are a few possibilities. First, check to see that the throttle plate in the carb has not come off. Next, make an external governor adjustment. If that does not solve your problem then the governor gear in the engine has come apart which unfortunately I think may be the case with you due to your hearing knocking. That will require removing the engine and opening the sump to inspect for internal damage and replacing the governor gear if there is no other damage.

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1 Answer

Idle adjustment


I do not think this will cause any damage. If it starts and runs fine I think you did a good thing.

Nov 06, 2013 | Toro Lawn Mower With Toro Power Tools

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Idle speed adjustment


You could also have an overused spring on the carb the connects to the govenor arm. Take the spring off and see how worn out it is.

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What is the high altitude adjustment required by the manual?


the high speed adjustment needs to be richened up to compensate for the lean air mixture at high altitude. it can run but will run fast and may damage the unit because it is lean. the high speed adjustment is the one marked H or the screw farthest from the engine. turn it counter clockwise while running at full speed until it runs at the correct RPM. any small engine repair center should be able to do this for you and keep you from causing irreparable damage

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I have a CCR 3650 Snow Blower ,The engine is racing at idle. How do I adjust?


Try the spring on the governor. sounds like it's not hooked up, or extremely week. I rebuild and sell these all winter. I've had it happen a few times. Runs really good! but, will ruin the motor running over speed like that. There are adjustments- some have the spring on a long flange of metal so it can be bent backwards to add tension- it doesn't take much! If the motor starts to rev up and down and up and down, add a hair more tension. It there is too much tension it will stall out when you hit heavy snow.

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1 Answer

Hi, I have an older toro snowblower w/ tecumseh 7 hp. When idling it is fine,but with full throttle the engine seems to over rev. I've adjusted the 2 carb settings to specs and it seemed to run well, but...


The carburetor settings should be to make the engine run correctly, not meet some specification. The upper jet is for idle adjustment and the lower adjustment is for high speed running. It the lower jet is too far CW, the engine will be running lean and tend to miss. Too far CCW and the engine will run 'muddy' and tend to blow black smoke from the exhaust. Throttle speed is determined by a balancing act between two springs, the governor, and the throttle position. Generally, there are several options for spring placement--a series of holes drilled in the throttle arm and the governor arm set this balance. Have the springs been replaced? Have you tried a fresh spark plug? You may require professional assistance on the throttle adjustment. Hope this helps!

Jan 27, 2011 | Garden

1 Answer

I have a Toro 524 with Tecumseh engine, model 38040 8 0000640. I am rebuilding the carb and would like to know what are basic settings for idle and hi/low speed screws?


The high speed mixture screw is initially set at 1 & 1/2 turns out. Then adjust it to give good acceleration and top speed, while not closing the screw more than you need to. The low speed mixture screw is set at 3/4 of a turn out. Adjust that, to give a smooth idle. The 3rd screw, the idle speed screw, is set to give a low idle speed without stalling.

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Carburator settings


If you have played with them the only way is to get it going pretty well is" ....
find the idle screw - usually larger - and turn in 1/2 a turn - hopefully that will keep it running - then find the 'slow' running screw turn it in until it stops then turn out 1 and 1/2 turns. Leave the fast one alone.
Get it started then adjust idle screw so its faaster if need be.,, now slowly turn the 'slow' screw in then out say 1/2 turn and listen for it either speeding up or slowing down leave it at the point where it sounds ok and try giveing a few 1/2 speed rev ups. If it goes back and idles as before - leave it.

The fast screw... (first make sure your exhaust outlet is totally unblocked - the slightest restriction here will cause it to never run right at high speed). Start it up and then try full throttle - same thing as before try adjust the fast screw first in a little then out until it runs well at what seems the faster speed it can - then check that it accelerates well from idle to full speed. If not adjust it a little more until it does.
Once it will idle ok and return to idle and also run full speed, then you can back off the idle screw until it will idle without the chain racing arond the bar.

Bear in mind th chain wil be racing around while you adjust it so keep fingers kids and idiots well away..because you are adjusting it with that chain moving..

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