What do you think I just said?
A tight rocker will open which ever valve it is tight on when the engine heats up. The condition will not present itself when warming up. And yes, burning a valve will over heat an air cooled engine. But it would also lower the compression in that cylinder. I didn't see the other plug, so it may be fine or maybe not.
Bill
> -----Original Message-----
> From:
> anzhonda600owners@yahoogroups.com
> [mailto:anzhonda600owners@yahoogroups.com]
> On Behalf Of
> blake
> neilson
> Sent:
> Tuesday, June 10, 2008 7:18 PM
> To:
> anzhonda600owners@yahoogroups.com
> Subject:
> RE: [anzhonda600owners]
> spark plug condition
> Sorry but I disagree.
> Too little clearance
> on the exhaust rocker will result in leaking of the mixture past the > exhaust valve, reducing effective compression ratio and leaving less > mixture in the combustion chamber and therefore less heat. I would > expect the exhaust valve to overheat and burn.
> Too little
> clearance on the intake rocker would result in possible backfire into > the intake manifold and again less effective combustion taking place in > the cylinder. So I see no reason for the spark plug to > overheat. A spark plug that runs too hot will blister and erode > both the center and ground electrodes.
> The spark
> plug in the picture shows clear signs of deposit formation from > additives in the fuel or oil consumption. Oil consumption leads to ash > formation in the early stages and later the gap can be bridged from the > oily deposits.
> Thanks for your
> reply.
> GNB
> --- On
> Tue, 6/10/08,
> billmyong@earthlink .net
>
> wrote:
> > From:
> > billmyong@earthlink .net
> >
> > Subject: RE:
> > [anzhonda600owners] spark plug condition
> > To:
> > anzhonda600owners@ yahoogroups. com
> > Date: Tuesday, June 10,
> > 2008, 12:37 AM
> > Engine is running hot.
> > > -----Original Message-----
> > > From:
> > > anzhonda600owners@
> > > yahoogroups. com [mailto:anzhonda600 owners@yahoogrou ps.com] > > > On > > > Behalf Of > > > blake neilson > > > Sent:
> > > Monday, June 09, 2008
> > > 8:31 PM
> > > To:
> > > anzhonda600owners@ yahoogroups.
> > > com
> > > Subject:
> > > RE: [anzhonda600owners] spark plug
> > > condition
> > > Why would a lack of clearance cause the
> > > condition observed in the pics?
> > > ---
> > > On
> > > Sun, 6/8/08, billmyong@earthlink .net
> > >
> > > wrote:
> > > > From:
> > > > billmyong@earthlink .net > > > .net> > > > > Subject: RE: [anzhonda600owners] spark plug > > > > condition > > > > To: anzhonda600owners@ yahoogroups.
> > > > com
> > > > Date: Sunday, June 8, 2008, 11:04 PM
> > > > Steve;
> > > > Check the rocker arms for to
> > > > tight. You may have a valve that is just a smidge > > > > open.
> > > > Bill
> > > > > -----Original
> > > > > Message-----
> > > > > From:
> > > > > anzhonda600owners@
> > > > > yahoogroups. com [mailto:anzhonda600 owners@yahoogrou > > > > > ps.com] > > > > > On Behalf Of > > > > > Steven > > > > > Michelsen > > > > > Sent:
> > > > > Sunday, June 08, 2008 1:54
> > > > > PM
> > > > > To:
> > > > > Honda group - 2cylinderhondas; Honda
> > > > > group - anzhonda600owners
> > > > > Subject:
> > > > > [anzhonda600owners] spark plug > > > > > condition
> > > > > Here is a picture of a NGK-R
> > > > > BR8ES spark plug, just pulled from my Coupe. Gap > > > > > is .030, which agrees with most web mentions.
> > > > > Any opinions of it's condition? They both look > > > > > like this.
> > > > > http://www.honda600 coupe.com/
> > > > > photos/honda_ groups/NGK_ BR8ES.jpg
> > > > > Thanks,
> > > > > Steve