LOW COMPRESSION ON FRANKENSPREE

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motomech
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Re: LOW COMPRESSION ON FRANKENSPREE

Post by motomech » Sun Aug 19, 2012 8:30 pm

noiseguy wrote:
jmcginn68 wrote:soaked it all in acetone for 2 weeks,pushed out the "main jet? thing w the little holes blew air + carb clean every wich way ,even that hole in bowl bottom.
I don't hear mention specifically of the idle jet... it won't idle with this plugged... and it's always plugged.
You might want to read this, it could be of help

http://scootdawg.proboards.com/index.cg ... hread=6235

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motomech
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Re: LOW COMPRESSION ON FRANKENSPREE

Post by motomech » Sun Aug 19, 2012 8:39 pm

With such a small swept volume these engines displace, it can be difficult to get an acurate reading with most compression testers which are designed much larger engines. Due to the volume of the hose, adapter and gauge result in low readings
The rule of thumb that I have used for decades, is just that, A rule of "thumb".
Basicly, I place my thumb firmly over the plug hole and with the throttle held open and using the electric starter, There should be enough compression to "pop" your thumb off the hole.
Not very sicentific, but it works for me

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Bear45-70
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Re: LOW COMPRESSION ON FRANKENSPREE

Post by Bear45-70 » Sun Aug 19, 2012 8:46 pm

motomech wrote:With such a small swept volume these engines displace, it can be difficult to get an acurate reading with most compression testers which are designed much larger engines. Due to the volume of the hose, adapter and gauge result in low readings
The rule of thumb that I have used for decades, is just that, A rule of "thumb".
Basicly, I place my thumb firmly over the plug hole and with the throttle held open and using the electric starter, There should be enough compression to "pop" your thumb off the hole.
Not very sicentific, but it works for me
You are a total moron, you don't know crap about being a mechanic, especially 2 stocks.
30 PSI will blow you finger off the spark plug hole and no 2 stroke will ever run with that low of compression.
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noiseguy
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Re: LOW COMPRESSION ON FRANKENSPREE

Post by noiseguy » Mon Aug 20, 2012 10:10 am

Bear45-70 wrote:You are a total moron, you don't know crap about being a mechanic, especially 2 stocks.
30 PSI will blow you finger off the spark plug hole and no 2 stroke will ever run with that low of compression.
Sentence 2 would have been adequate, Bear.
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paulpauly7
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Re: LOW COMPRESSION ON FRANKENSPREE

Post by paulpauly7 » Mon Aug 20, 2012 2:14 pm

just a slap on hand lol thats about the worst the bear will ever get
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fastplastic
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Re: LOW COMPRESSION ON FRANKENSPREE

Post by fastplastic » Mon Aug 20, 2012 6:25 pm

We both know u can't fix stupid right bear, but we can insult it can't we lol

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motomech
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Re: LOW COMPRESSION ON FRANKENSPREE

Post by motomech » Mon Aug 20, 2012 7:32 pm

fastplastic wrote:We both know u can't fix stupid right bear, but we can insult it can't we lol
Gee, I don't know how I have lived 60 years, 40 years working as a mechanic, without anyone ever calling me stupid and have managed to have at least two folks here doing so now.
I guess that serves me for trying to help.
Really, just a swell group here.
I guess I'll just move on.

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Re: LOW COMPRESSION ON FRANKENSPREE

Post by fastplastic » Mon Aug 20, 2012 8:46 pm

He's right though that's what many ppl forget he isn't the nicest about its good info ur thumb won't tell u if its 50 70 100 it a good way to check if u have rings..... My comment was not directed towards you it was a general statement towards others that are know it alls not meaning anyone in this thread.... But without the throttle open the test he did is invalid

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