[AT] OT- Briggs and Stratton valve clearance

[Cecil Bearden]

That's right Charlie!  I have one on my sprayer and put one on a 
Troy-Bilt roto-tiller to replace that hard starting Tecumseh engine.  I 
have 3 back in the shed still in the box just in case another Briggs or 
other brand gives up the ghost...
Cecil in oKla


On 6/24/2016 10:36 PM, charlie hill wrote:
> 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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