how many rpms

how many rpms are you guys running and how to know? and has any one modded a john deere stx38 if so can i get some pictures

My friend has one for a mudding tractor but its completely stock except for a push bar I made for him, It was out of three deck mount pieces from scrap tractors. with a couple holes drilled in them an mounted on the front.

ok thank you how many rpms are you running

No govenor on our motors, stock engines. We spin them until they run out of power, they seem to last for years. Just keep clean oil in them.

ok so no govenor just make sure to change oil often. do you have a video of one of your machines running? just to know what is ok to have my machine running at

I would try clicking on the youtube link in my sig.

ok will do and thanks for the info

what will happen if im running like 5000 or 6000 rpms

I wouldnt suggest going over 3600 rpms - wouldnt suggest removing the governer either UNLESS its been properly prepped, like billet flywheel and other go fast parts.

I had some pics somewhere of a pulling lawntractor - the flywheel exploded, took a serious chunk of the frame out of the tractor, part of the guy's leg standing next to it and it eventually stuck into the side of a steel barn a few yards away.

If you cant make enough power , get a bigger motor - i ran a stock governed 18.5HP twin on my murray and i was able to hit 30 plus mph easily ( was capable of more, but tractor was too unstable).

ok i just want to be able to do 10mph on my hydro

Not going to happen bud. If you over-drive the hydro you will just destroy the pump.

10mph will?

My friends runs stock RPMS, i dont know what that is, maybe search for a 12.5hp kohler command max rpm.

as one person posted where do i get the go faster parts

how many rpms can i run before flywheel explodes not worried about throughing a rod just dont want pieces sticking into me

greener179 wrote:

how many rpms can i run before flywheel explodes not worried about throughing a rod just dont want pieces sticking into me

3600

if i get a billet flywheel will i be ok to run 4000 or 5000

Without upgrading other components I would Probly say it's safe to run about 4500 with a billet

I guess for liability reasons, I would say follow the conservative advice.

can you guys keep a look out for a 12.5 hp kholer command billet flywheel

i found a steel adjustable flywheel will this work

yea over stock rev isnt best idea unless motor is built for it

12hp i got off a kid who removed gov idk how the flywheel didnt let loose?

ok will will get the steel flywheel what else should i get?

dont have to worry about over reving lets just say the romp go serious all was good and bomb wiring fries LOL

Haha dang, well heres something. I wouldn't worry about the flywheel exploding due to high revs since it's hardened steel, but rather braking a rod. It's a hit and miss situation, some engines will last awhile without a governor, and others wont last 5 minutes, it all depends. I would suggest a billet flywheel later on, but just to romp ungoverned get a billet rod. If you have a 12.5hp briggs you can run a 31ci OHV rod in them rather then the billet and they last a long long time (much stronger then the stock rods of a flatty 28ci briggs).