The combination of the 212cc Predator engine with a 5" pulley and the 81" belt is not going to work. It has too much slack, and the belt sometimes leaves the pulley when I push the pedal to the braking zone. When engaged, the the belt slips under heavy load, unless I lift up on the pedal, which lets the belt rub on itself.
My options are either a smaller belt or a bigger engine pulley. Does anyone have any tips on how much of a larger puller or smaller belt? A 5.5" or 6" pulley will give me a higher ratio and more top end, but this tractor has low gears, including a creeper gear.
By my math, with half of the pulley's circumference touching the belt, a 5.5" pulley engages 0.8" more belt than a 5", and a 6" pulley engages 1.57" more belt than the 5".
I'm doing this math because I think I can find a different pulley cheaper and more available than an 80" belt locally. Any thoughts?
Here is a picture in daylight.
Edited by bja105, December 24, 2012 - 01:28 PM.