Compression issue
#1
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Location: Buenos Aires, ARGENTINA
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Compression issue
Hi, from down south!
Would like to know if any one has ever found out why some gassers will exhibit more compression while hand rotating the prop clockwise instead of the normal operating mode, counter-clockwise??
It occurs with or without the crankcase back plate bolted on, so I have discarded crankcase pressure.
Thanks for any enlightening comments.
Juan
Would like to know if any one has ever found out why some gassers will exhibit more compression while hand rotating the prop clockwise instead of the normal operating mode, counter-clockwise??
It occurs with or without the crankcase back plate bolted on, so I have discarded crankcase pressure.
Thanks for any enlightening comments.
Juan
#7
RE: Compression issue
ORIGINAL: rexbirk
As long as we are on a discussion about compression why do the Chinese Engines have so little while my 3W Engines have so much when cranked by hand?
As long as we are on a discussion about compression why do the Chinese Engines have so little while my 3W Engines have so much when cranked by hand?
#8
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RE: Compression issue
Im kidding a little. It's funny though that I have weed eaters and chain saws that are not top of the line but they have good compression.
I have numerous Chinese Engines that run well but have little compression when hand cranked. My two 3W Engines on the other hand really get your attention when you hand crank them. I'm sure they have much better tolerances and fit. I'm sure thats some of what the extra cost gets you.
I have numerous Chinese Engines that run well but have little compression when hand cranked. My two 3W Engines on the other hand really get your attention when you hand crank them. I'm sure they have much better tolerances and fit. I'm sure thats some of what the extra cost gets you.
ORIGINAL: closetguy
your kidding rite.
your kidding rite.
#9
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RE: Compression issue
you have a point that I have made in the past.you can go out and buy a 79.00 weed eater feed it the cheapest oil you can find.it has great compression and never a problem with bearings and it just keeps running.
#10
Senior Member
RE: Compression issue
ORIGINAL: captinjohn
China made engines lack precise fitted parts.Sometimes too large of a ring end-gap. Cylinders can be out of round ...rings cannot seal good. Cylinders can have a taper...again rings cannot seal good. Ring material can be to hard...rings do not seat good. Ring could lack good machining...poor fit.
ORIGINAL: rexbirk
As long as we are on a discussion about compression why do the Chinese Engines have so little while my 3W Engines have so much when cranked by hand?
As long as we are on a discussion about compression why do the Chinese Engines have so little while my 3W Engines have so much when cranked by hand?
BCCHI
#11
RE: Compression issue
The more I read about all the problems with a lot of all these engines of various brands, I think it would be better to get a good conversion RC engine from one of the guys that know this stuff in the first place. They know by experience what goes wrong & rebuild/convert them to be more trouble free................
#12
RE: Compression issue
ORIGINAL: rexbirk
As long as we are on a discussion about compression why do the Chinese Engines have so little while my 3W Engines have so much when cranked by hand?
As long as we are on a discussion about compression why do the Chinese Engines have so little while my 3W Engines have so much when cranked by hand?
#14
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RE: Compression issue
Thanks for returning to the original thread subject, ie: CW and CCW compression!!!
The subject still baffles me.
Juan
The subject still baffles me.
Juan