over the weekend we put together the lawn mower that we have been planning. it has the briggs single cylinder 12.5 hp vertical engine. we are using the original john deere transaxle. we directly flipped the pulleys to give us a 4:1 ratio instead of the factory 1:4. we calculate the input shaft on the transmission to be spinning about 10 - 15 thousand Rpm. this go kart goes 30 mph in third gear. we will be testing it today for top speed capabilities. we expect about 45 - 50 mph top speed. this is the kind of lawn mower that you want to wear a crash helmet when driving it. before we test it for top speed we will have to lower the seat and steering wheel so that it isnt too top heavy. we dont want to flip it over. unfortunately it goes too fast to be safe so sadly, after the top speed test we have to change the pulleys for a top speed of about 30 mph because right now it is just too dangerous. we will probably have to build a roll cage over the engine so it doesn't get smashed if we flip. we will most likely end up putting a roll cage on the whole thing so that the driver is safe. we installed a bumper so that the motor is protected from trees and other lawn mowers. pictures and videos coming soon.
