engine tolerances - Re: [SEL] Coolspring & Beyond...

[Chris Busch]

>and left the original piston you would get a fair
>amount of piston 
>skirt slap.  Why not just try a new set of rings to 

On my vintage garden tractor project, last Sunday, I
put my FMZ 2hp dishpan back together with new rings. 
Since the stationary engine isn't stationary anymore,
I noticed that I have to improve clearances a lot
more.  

When the engine would tilt side to side, it would
knock, I fixed that by adding solder to the ends of
the main bearings.  This tightened up the end play
slop.

I also adjusted the mains to not have slop when
lifting on either flywheel.

However, I still notice a little knock sound if you
are in high gear and hit a big bump.  On the FMZ the
crank handle is loose, so it can bang around.  But
perhaps it is piston skirt slop?

I am using synthetic grease with teflon in it, for
super slippery-ness.  I use high quality modern motor
oil in the oiler.  (I may start using synthethic oil.)

The engine probably runs better than it has in 50
years. Although it is in battered work clothes. When
actually using these engines for work, you need 'em to
run right. :)



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Chris Busch
cgbusch at yahoo.com
http://www.geocities.com/cgbusch/