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Gas EZGO Gas EZGO Marathon, Medalist, TXT and RXV.



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Old 06-20-2012, 07:06 PM   #71
Heliarc
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Default Re: just got an 85 gas marathon

Have you tried a different compression tester?Very unusual to get nothing, even with an engine that's in pretty bad shape.I'm not trying to be an *** either, but are you sure that your tester is indeed screwing down into the sparkplug hole?You say "I have tried numerous times to screw a compression tester into the spark plug hole".So does that mean you can't get it to go in, or that you've tested it numerous times?If it was in properly and you got absolutely nothing, I'd say your tester is FUBAR, or you've got a broken connecting rod, which you'd have most likely noticed.I'd get hold of another tester to make sure you're getting a good reading.And it's pretty hard to mess up installing a compression tester.If you can put in a sparkplug, you can pretty much do a tester.

The hole on the front of the cooling fan shroud is where the oiler was at.
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Old 06-20-2012, 07:43 PM   #72
bignate524
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Default Re: just got an 85 gas marathon

i have gotten the compression tester screwed in just fine...and then when i turn the engine over i am not getting a reading....i even sprayed air from the pump hose into the compression tester to see if it worked and it was reading just fine, i don't know why my engine is showing nothing :(
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Old 06-20-2012, 08:24 PM   #73
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Default Re: just got an 85 gas marathon

I've never seen it personally - but bad wrist pin?
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Old 06-20-2012, 08:34 PM   #74
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Default Re: just got an 85 gas marathon

I haven't dug into the engine at all, i'm hoping it's not a problem that digs to that length....i'm hoping it's only a fuel pump issue and spark issue....i just want to get this *** thing running LOL don't care how fast it goes at the moment
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Old 06-20-2012, 09:34 PM   #75
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Default Re: just got an 85 gas marathon

Going right back to the first page, you heard a loud bang and then no power. That coupled to the fact that you have no compression leads me to believe that the piston has melted.

I listened to the videos and it does sound like the engine is turning but if the starter is turning the clutch pulley and the clutch is loose on the crankshaft that would also give you the same symptoms.

Other than that I fear that you need to pull the engine and get the head and cylinder off for a look.

Dave
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Old 06-20-2012, 09:43 PM   #76
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Default Re: just got an 85 gas marathon

I think that will be the next step for sure....i'll take the exhaust off and then check out the head of the engine...is there a way to check everything without pulling the entire engine???
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Old 06-20-2012, 09:47 PM   #77
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As easy as it is to pull it you may as well get it on the bench to get a good look at it.

Sent from my Evo
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Old 06-20-2012, 09:53 PM   #78
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Default Re: just got an 85 gas marathon

okay....any write up on the easiest way to pull it??? i don't want to lose anything important of mess anything up!!
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Old 06-20-2012, 10:04 PM   #79
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1: unhook fuel line from tank at the inlet to the fuel pump.
2: unhook cables from the carb and then from the mounting brkt.
3: after unhooking the battery cables from the battery but leaving cables attached remove the starter and set aside
4: remove muffler
5: remove plug wire
6: remove air cleaner tube
7: disconnect the pulsar wire
8: 3 bolts in the drivers side and 4 bolts on the passenger side
9: remove the engine

Drink a beer and start dis-assembly:eek:

Sent from my Evo
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Old 06-20-2012, 10:34 PM   #80
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Default Re: just got an 85 gas marathon

you guys are the best! haha
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