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| Gas EZGO Gas EZGO Marathon, Medalist, TXT and RXV. |
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02-23-2020, 07:50 PM
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#1 |
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Not Yet Wild
Join Date: Jun 2016
Posts: 13
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Another 3PG 1999 Marathon that wont start!
Just got done replacing the cylinder to crankcase gasket on my 2 cycle 3PG Marathon. The gasket was bad and could see bubbles there before I pulled the jug. The piston, rings, and cylinder looked pretty good when it was apart and the suspected gasket was bad. Everything is back together with a new gasket kit. Cart still wont start!! I have spark when checked with the spark tester and the the plug gets damp with fuel after cranking it for a while. Any suggestions??? Ready to push this thing off a cliff pretty soon ...
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02-23-2020, 07:51 PM
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#2 |
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Not Yet Wild
Join Date: Jun 2016
Posts: 13
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Re: Another 3PG 1999 Marathon that wont start!
Sorry its a 1990 - darn small keyboard on phone!
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02-23-2020, 08:01 PM
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#3 |
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Gone Wild
Join Date: Feb 2010
Location: Homosassa, FL
Posts: 415
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Re: Another 3PG 1999 Marathon that wont start!
Have you performed a compression test
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02-23-2020, 08:24 PM
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#4 |
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Not Yet Wild
Join Date: Jun 2016
Posts: 13
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Re: Another 3PG 1999 Marathon that wont start!
No I have not. Guess I will need to buy one a tester. Piston, rings, and sleeves all looked pretty good so I really had not thought about low compression. That's about the only thing left I supposed. Cart had been running pretty darn good before it just basically quit and I found the bad gasket.
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02-23-2020, 08:40 PM
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#5 |
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Test before replacing
Join Date: Aug 2013
Location: Ohio side of the Pennsylvania border.
Posts: 3,495
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Re: Another 3PG 1999 Marathon that wont start!
I would suspect crankshaft seals.
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02-23-2020, 09:47 PM
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#6 |
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Not Yet Wild
Join Date: Jun 2016
Posts: 13
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Re: Another 3PG 1999 Marathon that wont start!
Clutch side seal was just replaced. Is the flywheel side seal the same one or a different seal? Guess I will check compression first and see what I get.
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02-24-2020, 12:48 AM
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#7 |
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Test before replacing
Join Date: Aug 2013
Location: Ohio side of the Pennsylvania border.
Posts: 3,495
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Re: Another 3PG 1999 Marathon that wont start!
It's the same seal.
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02-25-2020, 07:00 PM
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#8 |
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Not Yet Wild
Join Date: Jun 2016
Posts: 13
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Re: Another 3PG 1999 Marathon that wont start!
Ok, just finished the compression test with my new Lisle 20250 tester. It consistantly read 115 psi. That's a pretty good reading, right? If so, its gotta be the flywheel side crack seal then? Just an fyi... the fuel pump was replaced before i found the bad gasket earlier nd it didn't change anything.
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02-25-2020, 08:43 PM
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#9 |
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Gone Wild
Join Date: Mar 2019
Posts: 156
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Re: Another 3PG 1999 Marathon that wont start!
115 is plenty in the two strokes. Take a look at your reed valve too. A faulty reed valve will result in loss of crankcase pressure and no suction for fuel.
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