How much tension should a mower deck belt have?

How tight should a lawn mower deck belt be?

How Tight Should A Lawn Mower Deck Be? Like everything else, make sure that your lawn mower belt is moderate – not too light and not too loose. Let us get to the point. If your lawn mower belt is too tight, it could make your mower slap around.

How much tension should a belt tensioner have?

Test the proper tension on the belts. A general rule of thumb for the correct tightness is being able to twist a belt with a thumb and finger a 1/2 turn and feel resistance. If you can turn it more than a 1/2 turn, you do not have enough tension on the belt.

Why is my mower deck belt loose?

Other Damaged Parts



Several other mower parts may cause the drive belt to come off repeatedly. … A properly adjusted mower deck slants slightly forward, making it about 1/8 to 1/4 inch lower in front than in back. If the angle is too sharp, then the belt may come off.

Can a mower deck belt be too tight?

If the belt is routed on the wrong side of the keeper, it makes the belt too tight and the blades will not turn off. … If the belt is routed correctly, park it on a hard level surface and remove the key.

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What are the signs of a bad belt tensioner?

Grinding or squeaking noise from the belts or tensioner



The most common symptom of a bad or failing drive belt tensioner is noise from the belts or tensioner. If the tensioner is loose the belts may squeak or squeal, especially when the engine is first started.

Is belt tensioner supposed to move?

It’s normal for it to move a little. That is to say it’ll rotate on it’s pivot. Similarly, should a belt tensioner wobble? A bad belt tensioner spring will often cause the tension arm to bounce up and down with the cycling of the motor.

How tight should a tensioner be?

The required measure of tension in the serpentine belt is that it should not deflect more than ½ inch when twisted either way from the middle. If twisted more, the belt is loose, and if twisted less, the belt is too tight. Either of the positions does not work for the vehicle.

How do you adjust the belt tension on a Poulan riding lawn mower?

How to Tighten the Belt on a Poulan Riding Lawn Mower

  1. Roll the Poulan riding mower onto a flat surface. …
  2. Lift the cover for the engine and remove the spark plug, using a socket wrench. …
  3. Lower the mower deck.
  4. Push in on the idler pulley underneath the engine. …
  5. Remove the bolt from the housing on the deck.

Why does my drive belt keep breaking?

Serpentine belt problems usually result from one of three causes: a defective belt tensioner; misalignment of a pulley; or, defective bearings in the tensioner, idler, or one of accessories driven by the belt (including the water pump).

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Why does my mower belt keep stretching?

Wear and tear:



Lawnmower belts stretch due to wear and tear, something that should expect with any machine. Over time, continued use of these lawnmowers results in some problems.

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