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What would cause engine rpm to increase and decrease ,then shutting down while mowing?

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Have an Ariens Max Zoom 60, when engage the mowing deck the engine loads up and RPM's drops way down" Have tightened and loosened belt, what else can I Try?


Something in the mower blade drive is binding up. That puts a drag on the engine and causes the slow down in RPM.

Jun 16, 2017 | Ariens Garden

1 Answer

Engine revs in od .what causes this


Your engine RPM should actually decrease when overdrive kicks in, if it is increasing that means that the overdrive is slipping

Mar 18, 2015 | Cars & Trucks

1 Answer

Car surging


Is the car equipped with the Automatic Transmission?
If so, read on.
Otherwise skip to the end and answer some questions.

POSSIBLE SCENARIO:
I have observed a condition where my car surges slightly when the torque-converter clutch (TCC) cycles between lock and unlock when driving on an uphill grade.
First some basics and history that will explain why the TCC is used.

Engine, Torque Converter, TCC, and Transmission relationship--
The TCC allows for a solid connection between the engine and transmission which allows the input to the transmission to rotate at the same speed as the engine.
Without a TCC, there is slippage between the engine and automatic transmission. The slippage is greatest at low engine RPM. That is what allows the engine to run with the automatic transmission in gear, like when you first shift into gear or stop at a stop sign. When the throttle pedal is depressed, the engine RPM begins to increase and the torque converter begins to slip less and less the more the engine RPM increases. The car moves. But even at cruising speeds the torque converter slips slightly. Engine RPM is greater than transmission input RPM, which is realized as slight decrease in fuel efficiency.
When acceleration is complete and a constant speed is being maintained, the engine power output is reduced to the point where the TCC can engage and eliminate any slippage between the engine and transmission. If the car has a tachometer the engagement of the TCC can be verified when a slight reduction in engine RPM observed without a corresponding change in vehicle speed.
One method used to test the operation of the TCC is as follows:
Find a flat section of road where it is safe to perform the test.
Reach a steady speed and keep the gas pedal depressed with one foot. While observing the tachometer (or listening for an increase in engine RPM), with the other foot depress the brake pedal enough to activate the break light switch but not enough to engage the brakes. When the brake light switch activates, the TCC receives a signal to disengage. With the gas pedal being held steady, release the brake pedal and the engine RPM should decrease when the TCC engages.
Old cars with Automatic Transmissions did not use a TCC. I believe the TCC was put in use in an attempt to increase fuel economy.

MY EXPERIENCE WITH SIMILAR SYMPTOMS
The condition that causes that issue on my car is this:
- A slight uphill grade increases the load on the engine.
The car tends to gradually slow and it is necessary to depress the gas pedal to maintain speed.
- Depressing the throttle pedal (manually, or automatically with cruise control engaged) signals the torque converter clutch to unlock when the load increases slightly. (A more drastic load increase would signal the Transmission to downshift to a lower gear.) The corresponding increase in engine RPM and output is enough to compensate for the reduction in speed. When the vehicle speed, engine RPM, and throttle position stabilize to the point that the TCC will engage and the engine RPM will reduce in correspondence with TCC engagement. Now, if the road conditions have not changed, power output is not enough to maintain vehicle speed. With the increased load caused by full engagement between engine and transmission, and the cycle (surging) repeats itself until the road conditions change.

Does that help?
If not:

QUESTIONS
Please define the symptoms.
What are the road conditions when the surge occurs? (A slight uphill grade?)
What is the frequency of the surge?
Does the engine power output have a noticeable surge?
Is there a speed change related to the surge?
Does the tachometer move up and down with little or no change in vehicle speed?
Are all instrument indication in the normal range?
What else has changed?

Good luck!

May 24, 2014 | Subaru Impreza WRX STi Cars & Trucks

1 Answer

I have an 03 Jeep Grand Cherokee v6 2x2 with 170k... I'm having a couple of issues... 1. Occasionally will have trouble with cycling through gears when getting on Hwy causing decreased, sluggish...


I would consider changing the vehicle speed sensor. When they go bad, they can really throw out a lot of bad data to the computer, resulting in unexpected behavior like you're experiencing. They're only around $20-$25. I hope this helps! :)

May 02, 2014 | Cars & Trucks

1 Answer

Purpose of increasing the idiling


Hi sharun,
We should never increase the rpm . What comes from factory is the best . Sometimes in cold condition The will give you hiccup .so we increase the rmp otherwise no need
MORE RPM LESS MILEAGE

the engine sound has to be tak tak .

Mar 29, 2013 | 2007 Bajaj Pulsar 150

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

Jun 28, 2011 | Briggs Stratton H7159 & StrattonĀ® 5500,...

1 Answer

The engine rpm's increase and decrease when in


Does your van have the V-Tec engine? If it does, you will have to take it to a dealer to get it fixed. What is happening is one or more of the solenoids under the valve cover is malfunctioning. The result is the surge in rpm's and the rough transition. You could try an indy mechanic but any mech worth his salt will tell you to take it to the dealer.

Oct 28, 2009 | 2003 Honda Odyssey

2 Answers

Engine cuts out with clutch engaged.


idle adjust?
there SHOULD be an adjuster under the seat or gastank within easy reach. Clockwise to increase rpm, ccl to decrease rpm. idle around 1400rpm when engine is at normal operating temp. Good luck!

Aug 04, 2009 | 2002 Yamaha YZF-R1

1 Answer

DGS 6500 w/26hp Kohler Courage surging


i HAD SIMILAR ISSUES WITH MY 2500 SERIES CUB CADET....IT WAS THE CARB.....REPLACED, AND ALL HAS BEEN WELL...THINK IT WAS APROX 200.00

Jul 03, 2009 | Craftsman 26 hp 54 in. Deck Deluxe Yard...

1 Answer

The idle pulsate when hot


That sounds like the start of a transmission problem. Get the code pulled from an auto parts store, they will do it for free. Then check the code.

Aug 05, 2008 | 1996 Saturn SL

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