How do I increase the RPM on B&S engine

rolmAugust 3, 2008

Have a mower with a 2002 year B&S Quantum 6.5-HP, The engine runs nice and smooth problem is it seems to be running to slow I would like to increase the RPM I do not see any adjustments on the Carb.

Thank you for reporting this comment. Undo
canguy(British Columbia)

Remove the air filter and you will see a tang with the governor spring attached. Gently bend the tang to put more tension on the spring. This is best done with a tach, don't get carried away and cause the engine to grenade.

    Bookmark   August 3, 2008 at 11:18AM
Thank you for reporting this comment. Undo

I do not see a tang, I did move the spring to a small hole that was a bit further out ( more tension on the spring) this has increased the rpm a bit.

    Bookmark   August 4, 2008 at 7:56PM
Thank you for reporting this comment. Undo

I have had a lot of mowers brought to me for repair, where people tried to "increase the RPM " by tinkering with the governor. I pointed to the hole in the crank case and told them to buy a new mower. Most of these engines are plain bearing engines (bushings everywhere) they cannot tollerate anything above 3500 rpm.

    Bookmark   April 22, 2010 at 5:00PM
Thank you for reporting this comment. Undo
eagleman35(5b MO)

The mower shop will check with a tach before adj RPM

If needed with charge 10-12 for the 10 min this takes.

    Bookmark   April 23, 2010 at 2:53PM
Thank you for reporting this comment. Undo

See the posting on this page titled:

"idle very high with no adjustment"

There is a picture there.

    Bookmark   April 23, 2010 at 9:08PM
Sign Up to comment
More Discussions
Honda HRX217
Had it for 10 years and is the best mower I ever had....
Mclane 20" mower at Sears... why so inexpensive?
Hey everyone, I want to get yall's input on a mower...
New Toro Push Mower?
I am looking to replace an 11 year old Toro Recycler,...
john deere RX75 belt diagram
I have a Rx75 with 9hp motor. I bought it used and...
snow throwing
older blower. 7hp, 24" width, 14" auger....
© 2015 Houzz Inc. Houzz® The new way to design your home™