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Gas Yamaha Gas Yamaha Golf Cars; G1 through "The Drive" and U-Max Utility Vehicles



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Old 04-11-2014, 11:16 AM   #1
duramax
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Default engine compression

what is the factory new compression for a g16 what is mid & lowest acceptable
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Old 04-11-2014, 11:21 AM   #2
smallblock450sl
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Default Re: engine compression

Service manual calls for standard: 164 psi, minimum:142 psi. Remember to test with a strong battery and at wide open throttle.
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Old 04-11-2014, 02:45 PM   #3
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Default Re: engine compression

thanks
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Old 04-11-2014, 02:47 PM   #4
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Default Re: engine compression

do you test at operating temp or cold
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Old 04-11-2014, 04:44 PM   #5
CAMPERCART2013
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Default Re: engine compression

Is it the same for 1994 g9 285?
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Old 04-12-2014, 06:50 AM   #6
technoid
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Default Re: engine compression

Quote:
Originally Posted by duramax View Post
do you test at operating temp or cold
test cold. If compression is low spray some oil in the spark plug hole. If it comes up by 30 Lbs or more you need rings.
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Old 04-12-2014, 04:35 PM   #7
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Default Re: engine compression

10-4
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Old 04-13-2014, 10:54 AM   #8
sho305
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Default Re: engine compression

Older carts have higher compression, the G2 is the most iirc in the 180 range in good condition, G9 lower. My G9 if you take the breather tube off the airbox when it gets worn it will start to puke more oil out, will also blow smoke out when hot. Can smell the stink when you slow and stop after a WOT run hot if you have it unhooked. Note with stock cart it can make it run lean mine was jetted and airbox hogged out some. I kept it hooked up because of the fumes, but it has a clone engine in there now after it started burning oil and smoking out exhaust. Never used a drop of oil before that and used synthetic in it. I guess they don't last forever lol but clone is awesome plan for it if you can and like more power.
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