1600 RPM vs. 1800 RPM

Farmall Cub Forum -- Questions and answers to all of your Cub related issues.

Moderator: Team Cub

Forum rules
Notice: For sale and wanted posts are not allowed in this forum. Please use our free classifieds or one of our site sponsors for your tractor and parts needs.
User avatar
5+ Years
5+ Years
Posts: 176
Joined: Thu Feb 21, 2013 10:04 pm
Zip Code: 39042
eBay ID: ccbil
Tractors Owned: '48 Cub (Great Granddaddy's)
And some bigger ones.....
Location: Brandon, MS

1600 RPM vs. 1800 RPM

Postby DieselDennis » Wed Apr 17, 2013 10:07 am

What makes the difference between the two top end speeds? I have a '48 that has a tag at 1600. But I've seen tags of other '48s that are stamped 1800.

Is there something different internally to limit it to 1600? Was it just an "upgrade" by marketing?

And how do you turn it up?
'48 Cub 12V Conversion, Zenith Carb, Electronic Ignition

User avatar
John *.?-!.* cub owner
Team Cub Guide
Team Cub Guide
Posts: 22590
Joined: Sun Feb 02, 2003 2:09 pm
Zip Code: 63664
Tractors Owned: 47, 48, 49 cub plus Wagner loader & other attachments. 41 Farmall H.
Location: Mo, Potosi

Re: 1600 RPM vs. 1800 RPM

Postby John *.?-!.* cub owner » Wed Apr 17, 2013 10:45 am

On top of the governor is a small cap screw with a lock nut. Just loosen the lock nut and back the screw out a little. that allows the throttle lever to move further and give the higher rpm. That is the only change I know of at that point. Later ones that went to still higher rpm had different governor weights.
If you are not part of the solution,
you are part of the problem!!!

Jim Becker
Team Cub
Team Cub
Posts: 13393
Joined: Sun Feb 02, 2003 2:59 pm
Zip Code: 55319
Circle of Safety: Y
Location: MN

Re: 1600 RPM vs. 1800 RPM

Postby Jim Becker » Wed Apr 17, 2013 7:53 pm

I'm unclear as to where the 1600 stampings came from. The first production Cub (#501) was stamped 1800. Are you sure the 6 isn't just a poorly stamped 8?

The difference between the 1600 and 1800 figures is that 1800 was the maximum idle speed (no load). 1600 was the rated engine speed. Rated speed is the speed that it develops the most horsepower under a full load. Maximum idle speed is always higher then rated speed.

Return to “Farmall Cub”

Who is online

Users browsing this forum: Bill, Crimson Tim and 4 guests