YS-140 low compression

[Bartman]

Another engine question!

I just got my Hydeout back (2M pattern by Chip Hyde) from a friend of mine that "bought" it from me early last year (maybe the year before?). The engine is a YS140 and it's got almost no compression. I don't remember what it had when @Cub Man "bought" it from me, is it normal for a YS140 to have very little compression?

What might it be? valves? cam? rings? anything else that typically happens to these engines?

Thanks!
Bart

 

[Jetpainter]

Isnt @49dimes a YS man?

 

[jamesrxx951]

Here you go: http://giantscalenews.com/threads/classifieds-quit-your-hoarding.4161/#post-90123

Just saying................................................

 

[Bartman]

Here you go: http://giantscalenews.com/threads/classifieds-quit-your-hoarding.4161/#post-90123

Just saying................................................

sell it? is that what you're saying?

i already "sold" it once and I'm loving the fact that I got it back finally! i think @Cub Man was trying to clear his conscience!

 

[dhal22]

Maybe send it to YS for service? Pattern forums might be some help.

 

[Bartman]

Pattern forums might be some help.

blasphemy! if we can't fix it i don't want it! lol

 

[Bunky.F.Knuckle]

It can only be ring or valves that cause low compression. Head gasket does come to mind as well.

Try to run it, if possible and check compression after it runs for a few minutes.

 

[camss69]

It can only be ring or valves that cause low compression. Head gasket does come to mind as well.

Try to run it, if possible and check compression after it runs for a few minutes.

Yep as long as the bearings are smooth I'd run it and see how it feels after.

 

[Bartman]

ok, will do.

 

[49dimes]

Been out selling off some YS engines. @Bartman the 140 comes in 3 different flavors! 140FZ, 140L and 140 dingo. Which one you got? The FZ is typical to traditional YS internals and the other two incorporate a crank shaft ring as well as ported piston crowns. But as the other guys have said run it first and see if the compression comes back. Piston rings and valves like to stick when the engine has not been run in some time.