search sponsored by:
Advanced Search

The Green Industry's Resource Center

Old 04-12-2013, 09:31 AM
besman besman is offline
LawnSite Member
Join Date: Nov 2011
Posts: 10
21hp Briggs engine

Hi - i am working on my cousin's lanwnmower since they don't have alot of funds to take it to the shop. It's a JD 0-turn originally with a 17.5hp Briggs vertical shaft engine but let loose last year so was replaced with a 21hp single Briggs. I don't have the engine model number but the date of manufacture was oct 2012 i believe. i found that the flywheel bolt was loose and sheared the key. The keyways on both the flywheel and crank are fine just needs a new key. Now, the question, what's the correct torque for this flywheell bolt?


Reply With Quote
Old 04-12-2013, 11:58 AM
kymowboy kymowboy is offline
LawnSite Member
Join Date: Jun 2012
Location: Kentucky
Posts: 62
21 hp single vertical is either a model 31 or model 33, both show 100 ft-lb in the Briggs "Single Cyinder OHV Air Cooled" manual.
Make sure you get the "right" key, don't try to make a piece of regular key stock work.
Reply With Quote
Old 04-12-2013, 12:11 PM
besman besman is offline
LawnSite Member
Join Date: Nov 2011
Posts: 10
kymowboy - ok. 100 ft-lbs. Just what i needed. yeah i told him to go to the store and pick up a key, he was wanting to make since he was a machinist at one time. He is now going to get one this morning.
Reply With Quote

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Layout Style:

Powered by vBulletin® Version 3.8.6
Copyright ©2000 - 2015, Jelsoft Enterprises Ltd.
Copyright ©1998 - 2012, LawnSite.comô - Moose River Media
All times are GMT -4. The time now is 10:54 PM.

Page generated in 0.05600 seconds with 10 queries