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Posted by Duane Bozarth on July 15, 2005, 8:04 am
Stormin Mormon wrote:
>
> Sounds like a valve clearance problem to me. Either that, or the fuel line
> is too close to the engine. But more likely valve clearance.
.....
That sure wouldn't be the first place I'd look....more likely electrical
as someone else noted w/ thermal expansion...besides the magneto, it
could also be the plug ceramic...(look, look)...oh, I see he did change
the plug so it's upstream of there...
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Posted by Stormin Mormon on July 16, 2005, 1:44 am
I may well be misaken. But I've seen valve clearance problems several times
before. Though, coil problem is a bit easier to fix. How about find another
coil to try for awhile?
--
Christopher A. Young
Learn more about Jesus
www.lds.org
www.mormons.com
Stormin Mormon wrote:
>
> Sounds like a valve clearance problem to me. Either that, or the fuel line
> is too close to the engine. But more likely valve clearance.
.....
That sure wouldn't be the first place I'd look....more likely electrical
as someone else noted w/ thermal expansion...besides the magneto, it
could also be the plug ceramic...(look, look)...oh, I see he did change
the plug so it's upstream of there...
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Posted by Duane Bozarth on July 16, 2005, 8:31 am
Stormin Mormon wrote:
>
> I may well be misaken. But I've seen valve clearance problems several times
> before. Though, coil problem is a bit easier to fix. How about find another
> coil to try for awhile?
How about checking for spark when hot first, as has already been
suggested (several times)????
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Posted by Edwin Pawlowski on July 15, 2005, 12:55 pm
>
> I took a small engine repair course years ago. To fix this, you have to
> take
> off the motor cover, the cylinder head, and then remove both valves. Grind
> a
> little off the bottom, ch eck the clearance, and put it back together.
> Requires some specialized tools, and some replacment gaskets.
What makes for less clearance after 4 years of running? I'd have thought
the opposite would happen. Or is it worn on the stem and not contacting
properly so relieving the valve seat brings it back?
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Posted by Rick on July 15, 2005, 1:00 pm
>
message
> >
> > I took a small engine repair course years ago. To fix this, you
have to
> > take
> > off the motor cover, the cylinder head, and then remove both
valves. Grind
> > a
> > little off the bottom, ch eck the clearance, and put it back
together.
> > Requires some specialized tools, and some replacment gaskets.
>
> What makes for less clearance after 4 years of running? I'd have
thought
> the opposite would happen. Or is it worn on the stem and not
contacting
> properly so relieving the valve seat brings it back?
No, the valve seat sinks into the block. There's supposed to be a
little clearance between the lifter and the tip of the stem, so you
grind the end off.
That's for the more common valves in block type., not on an OHV..
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