Euro Small Engine Parts
Your Cart
Stock quantities, camera's verifying orders, real-time tracking, correct parts first time, every time!

Belts

How To Measure V-Belts

All A,B,C,D,E,AX,BX belts list the inside circumference measurement after the letter of the v belt part number. Example: A88 has a 88" inner circumference, then you add 2 inches for the A Section (Listed below) to obtain the outer circumference. If you measure the outer circumference, then you would subtract the number of inches based on the section you have (Listed below) to obtain the v belt number. This is also the same for the banded belts. Measure each individual band for banded belts to obtain the correct width.

Examples of how belt numbers are coded per section:

  • A Section= Add 2" to belt number (Example A88 = 90" Outside Circumference)
  • B Section= Add 3" to belt number (Example B88 = 91" Outside Circumference)
  • C Section= Add 4" to belt number (Example C88 = 92" Outside Circumference)
  • D Section= Add 5" to belt number (Example D105 = 110" Outside Circumference)
  • E Section= Add 6" to belt number (Example E144 = 150" Outside Circumference)
  • AX Section= Add 2" to belt number (Example AX60 = 62" Outside Circumference)
  • BX Section= Add 3" to belt number (Example BX50 = 53" Outside Circumference)

How fractional & wedge belt numbers are coded

All sections 3L,3V,5V,8V,3VX,5VX belts have the outside circumference after the number and letter(s). Example: Belt # 3V600 has a 60" outside circumference. Inside circumference are not measured for these sections. This is also for the banded belts. Measure each individual band for banded belts to obtain the correct width.

Examples of how belt numbers are coded per section:

  • 3L Section= (Example 3L450 = 45" Outside Circumference)
  • 3V Section= (Example 3V800 = 80" Outside Circumference)
  • 5V Section= (Example 5V1180 = 118" Outside Circumference)
  • 8V Section= (Example 8V2120 = 212" Outside Circumference)
  • 3VX Section= (Example 3VX520 = 52" Outside Circumference)
  • 5VX Section= (Example 5VX810 = 81" Outside Circumference)

Measuring K,L,M Micro Rib Belts:

Width's
  • K Section= 0.140" X's the number of ribs
  • L Section= 0.185" X's the number of ribs
  • M Section= 0.370" X's the number of ribs

All sections K,L,M belts will have the outside circumference in front of the letter. The rib count will be the number after the letter.

Outside Circumference & Rib Count per section:

  • K Section= (Example 845K8 = 84.5" Outside Circumference and 8 Ribs)
  • L Section= (Example 540L10 = 54" Outside Circumference and 10 Ribs)
  • M Section= (Example 940M6 = 94" Outside Circumference and 6 Ribs)


Lawn Mower Belt Problems?

Belts do so much to keep your equipment running smoothly.

That’s why it’s important to keep them working in peak condition. Check them regularly to avoid serious problems.

The chart below shows some possible signs of belt problems and solutions. This chart can be used as a general guide

and is not meant to be used as the sole source of information on belt problems.

PROBLEMMOST LIKELY CAUSEOTHER POSSIBLE CAUSES
Stack is misplacedBelt squeals or slips.
Sidewall repeatedly worn.
Cracked underside.
Belts rubs the guardDamaged tie band.
Sidewall repeatedly worn.
Cover is worn.
Backside idlerCover is worn.Cracked underside.
Improper storage, stored too longCracked underside.
Sidewall repeatedly worn.
 
Not enough tensionBelts excessively vibrate.
Belts comes off pulley.
Sidewall repeatedly worn.
Belts or squeals or slips.
Improper installation of pulley Wobbling pulley.
Bushings are cracked.
Too much tensionBelts excessively vibrate.
Repeated breakage.
Hot bearings.
Shaft bends.
Pulleys are misalignedBelts excessively vibrate.
Damaged tie band.
Sidewall repeatedly worn.
 
Pulleys are damagedHot bearings.
Wobbling pulley.
Cracked underside.
Belts excessively vibrate.
Bushings are cracked.
Shaft bends.
Belts bottom out.
Damaged tie band.
Belt squeals or slips.
Too much heatSidewall repeatedly worn.Cracked underside.
Bearing too far from pulleyHot bearings.
Shaft bends.
 
Poor bearing or shaft wornHot bearings.
Wobbling pulley.
Shaft bends.
 
Belt has reached end of service lifeBelts bottomout. 
Belts matched up wrongBelts excessively vibrate.
Sidewall repeatedly worn.
 
Wrong type of beltBelt rides too high.
Belts bottom out.
Belts squeals or slips.
Belt comes off pulley.
 
Machine induced impulseRepeated breakage.Belts excessively vibrate.
Belt comes off pulley.
Too much oil or greaseBelt swells, is soft.
Hot bearings.
Belt squeals or slips.
Sidewall repeatedly worn.
 
Harsh operating conditionsSidewall repeatedly worn. 
Grooves of pulley dirty (particles in them)Cracked underside.
Belt comes off pulley.
Repeated breakage.
 
Too much moistureBelt comes off pulley.
Repeated breakage.
 
Insufficient belt on small pulleyBelt comes off pulley.

Cover splits.

We use cookies and other similar technologies to improve your browsing experience and the functionality of our site. Privacy Policy.