Briggs & Stratton valve seat HELP!

tegraz · 04-14-2008, 08:49 AM

I have a briggs & Stratton lawnmower Model-31G777, Type-0120 /E1/021127ZA. It stopped working and when I took the head off I seen the valve seat had came loose from the head. Unfortunately the valve seat was cracked and needing replaced. I contacted B&S who told me they didnt sell the valve seat and I would have to replace the entire head!!!
Does anyone know of an aftermarket supplier who could help me out. Alternatively does anyone know where I can buy an oversized valve seat.
HELP! the grass is getting very long...

**K-B** · 04-17-2008, 07:17 AM

Briggs is right. You cannot re-install a valve seat (well, you actually can, we have done it, unsuccessfully, and I do not recommend you trying it). Get a shortblock or a new engine.

tegraz · 04-18-2008, 03:18 AM

Cheers K-B.
Sorry but your suggestion of buying a new engine is a silly as Briggs decision not to sell a $2 seat. Seems like a bit of a stitch-up, these engines are well known for popping the valve seat yet Briggs wont sell you a $2 seat, insisting that you need to buy a new head for $300. They will however sell you seats for different engines... just not this one.
Does anyone know if any other inlet-seats will fit this head, cant imagine that Briggs would use this cast for only one engine

**K-B** · 04-18-2008, 07:44 AM

Quote:

Originally Posted by tegraz

Cheers K-B.
Sorry but your suggestion of buying a new engine is a silly as Briggs decision not to sell a $2 seat. Seems like a bit of a stitch-up, these engines are well known for popping the valve seat yet Briggs wont sell you a $2 seat, insisting that you need to buy a new head for $300. They will however sell you seats for different engines... just not this one.
Does anyone know if any other inlet-seats will fit this head, cant imagine that Briggs would use this cast for only one engine

How many valve seats have you successfully replaced? Just curious.

icrman · 04-19-2008, 11:03 AM

You may be able to find a guy with a lathe that could make one for you.
Though the proper material is a bit pricey. On a small engine something like 17-4 would probably live just fine and priced affordably.

tegraz · 04-21-2008, 03:44 AM

Quote:

Originally Posted by K-B

How many valve seats have you successfully replaced? Just curious.

On a lawnmower, none, but on motorcycle, car and boat engines, many. Next step is to visit the local machine shop to see if they can make me a valve seat. Thanks for your help

04-14-2008, 08:49 AM	#1 (permalink)
tegraz Registered User Join Date: Apr 2008 Posts: 3 OS: win xp	Briggs & Stratton valve seat HELP! I have a briggs & Stratton lawnmower Model-31G777, Type-0120 /E1/021127ZA. It stopped working and when I took the head off I seen the valve seat had came loose from the head. Unfortunately the valve seat was cracked and needing replaced. I contacted B&S who told me they didnt sell the valve seat and I would have to replace the entire head!!! Does anyone know of an aftermarket supplier who could help me out. Alternatively does anyone know where I can buy an oversized valve seat. HELP! the grass is getting very long...

04-17-2008, 07:17 AM	#2 (permalink)
K-B Moderator/Gearhead Join Date: Oct 2005 Location: NY Posts: 2,629 OS: PCLinuxOS 2007 My System	Re: Briggs & Stratton valve seat HELP! Briggs is right. You cannot re-install a valve seat (well, you actually can, we have done it, unsuccessfully, and I do not recommend you trying it). Get a shortblock or a new engine. __________________ Registered Linux User #435503 You can help keep TSF running by donating Free Partition Tool:: GParted -- LiveCD Best Linux Distro: PCLinuxOS

04-18-2008, 03:18 AM	#3 (permalink)
tegraz Registered User Join Date: Apr 2008 Posts: 3 OS: win xp	Re: Briggs & Stratton valve seat HELP! Cheers K-B. Sorry but your suggestion of buying a new engine is a silly as Briggs decision not to sell a $2 seat. Seems like a bit of a stitch-up, these engines are well known for popping the valve seat yet Briggs wont sell you a $2 seat, insisting that you need to buy a new head for $300. They will however sell you seats for different engines... just not this one. Does anyone know if any other inlet-seats will fit this head, cant imagine that Briggs would use this cast for only one engine

04-19-2008, 11:03 AM	#5 (permalink)
icrman Registered User Join Date: Apr 2008 Posts: 19 OS: xp, linux	Re: Briggs & Stratton valve seat HELP! You may be able to find a guy with a lathe that could make one for you. Though the proper material is a bit pricey. On a small engine something like 17-4 would probably live just fine and priced affordably.