[AT] OT- Briggs and Stratton valve clearance

Cecil Bearden crbearden at copper.net
Sat Jun 25 04:01:01 PDT 2016


You can replace that with stainless steel wool.   The pads are available 
at Wal Mart...   Just stuff them in the tank.  Get the ones with the 
coarse wool, or what looks like curled wire.  That way the vibration 
won't cause little pieces to get in the carburetor.
Cecil in OKla

On 6/25/2016 1:32 AM, k7jdj at aol.com wrote:
> Thanks Charlie,
>
> That's been suggested by several others.  I like the challenge of the broken engine but at some point will likely just go with a Harbor Freight replacement.  The Briggs engine has a special gas tank that I replaced last year for what a replacement engine costs.  It is filled a a material that looks a little like Scotch bright.  This is to reduce issues caused by the extreme vibration. I hope to get back to repairs tomorrow.
>
> Gary
> Renton, WA
>
>
> -----Original Message-----
> From: charlie hill <charliehill at embarqmail.com>
> To: Antique tractor email discussion group <at at lists.antique-tractor.com>
> Sent: Fri, Jun 24, 2016 8:42 pm
> Subject: Re: [AT] OT- Briggs and Stratton valve clearance
>
> You can buy a 6.5 HP honda clone from Harbor Freight for about $100.00.
> It should fit right in place of the B&S and it's a better engine.
>
> Charlie
>
> -----Original Message-----
> From: Dennis Johnson
> Sent: Thursday, June 23, 2016 10:49 PM
> To: Antique tractor email discussion group
> Subject: Re: [AT] OT- Briggs and Stratton valve clearance
>
> Gary,
>
> Valve wear like what you describe are common on Brigg's engines. I have seen
> it several times. Not sure of the exact wear mechanism but my guess is that
> 3/4 of the wear is on the valve, and the other 1/4 is on the hardened seat.
> When you get  Brigg's that losses power when hot, that is the first thing to
> check.
>
> Thanks,
> Dennis
>
>
> Sent from my iPad
>
>> On Jun 23, 2016, at 9:23 PM, John Hall <jtchall at nc.rr.com> wrote:
>>
>> Maybe if that engine was built for leaded fuel, the lack of the "cushion
>> deposit" the lead used to leave has allowed for the seats and valves to
>> hammer themselves to the point you lost clearance?
>>
>> John Hall
>>
>>
>>
>>> On 6/23/2016 8:45 PM, k7jdj at aol.com wrote:
>>> Not a lot of traffic so I thought I would post a question about a 70's
>>> vintage  5 HP Briggs engine.  The engine is used on a plate compactor so
>>> it is subject to extreme vibration.  I made the mistake of letting
>>> someone else use it and got a report that the engine was running
>>> extremely fast and you couldn't adjust the speed.  Quick check and it was
>>> obvious the throttle plate had fallen off the shaft.  Not an easy fix but
>>> after a lot of bad language I was able to reinstall with a new screw.
>>> The engine would not start.  It would try but just would not run.  I
>>> checked the compression and it was zero.  Pulled the head and discovered
>>> the intake valve was not closing completely.  Exhaust was OK but probably
>>> doesn't have enough clearance.  These valves are adjusted by
>>> filing/grinding the valve stem.  Not a big deal but I can not figure out
>>> why the valve clearance would decrease.  I can't imagine there can be
>>> enough valve/seat ware to reduce clearance nor the valve stem growing l!
> o!
>> ng!
>>>   er so what am I missing?
>>>
>>> Gary
>>>
>>> Renton, WA
>>>
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>>
>>
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