Topic: imow 8 to 1 ratio not working

[Mow guard]

ive got a problem i spent all day adjusting my adjustable pulley to try to get 8:1 i got a 6" up front and a 4 1/2" adjustable in the back. No matter how small i make it its a half turn away from 8:1 and any smaller the belt locks up in the pulley. i have a 5 speed spicer transaxle w/16" rear tires ive made 2 other imows before but ive never ran into this problem. Is it a gearing issue in the transaxle or its somthing else?

need help bought to tear hair out.

[Mow guard]

is there a new gear set i can throw in tranny? to make work?

[slowmowrider67]

I always ran ran a 4" adjustable pulley and never had a problem getting the ratio right. With the 4" I was always dead on 8 to 1.

[evansop]

Have you locked the Diff.. My experience with Foot/Spicer are unreliable. And any pulley under 4.5" deals with major slippage.

[more4les]

6" to 4". With a well built clutch system there shouldn't be slippage. We run our Modified twins with an 8 to 4 through a 700 with 18x9.50-8 rears ahd don't have slippage.

Lester

[ctown75]

What do you mean when you say the belt locks up in the pulley

[Mow guard]

What do you mean when you say the belt locks up in the pulley

i try to make the rear pulley so small to get that little bit extra to get 8:1 that theres no grove in the pulley left its to big so theres no grove.

[Burwell555]

Are you running a true a series pulley? If not, you don't truly have a 6" motor pulley. Easiest bet to make it work, go up on engine pulley.

[more4les]

6" to 4.5 usually will give 9 to 1. 6" to 4" will be closer to the 8 to 1. You are trying to turn a 4.5" into a 4". Start with a 4".


Lester

[Mow guard]

the thing is ive alwas used the same sizes and transaxle gear sets and always got 8:1 and its not belt slippage also the rear set is 13:1

[Mow guard]

well i have no choice i have to go up sizes its like a 3" margin before 8:1 so would going with a tractor supply 7" pulley work???

[nip 19]

 if you backed out 1 round or a half round from where you're at now would you be over or under  8 to 1. Also is this in the highest gear?

[Toadworks]

Using the numbers you gave;

6 motor, 4.5 trans, 13:1 final drive

4.5/6*13=9.75:1.

Assuming you can dial the adjustable pulley a full inch up or down you should have room to get 8:1;

3.5/6*13=7.58:1

But if you can only adjust the pulley 1/2 an inch you won't make 8:1;

4/6*13=8.66:1

So let's plug in the value for a 7 inch drive pulley;

4.5/7*13=8.35:1

A little adjustment on the driven pulley

4.35/7*13=8.07:1

Get yourself a 7 inch drive pulley.