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#1 |
Not Yet Wild
Join Date: Jun 2018
Posts: 1
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![]() I Over hauled robin 395 engine, put in new coil, pulsar, plugs, compression is 90 - 100 and spark fire looks ok, motor runs good when cold or warm, when driving around for 5 - 10 minutes it will really heat up and stop running until it will cool off. what could be the problem. It will still make fire and have compression when hot.
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#2 |
Nincompoop First Class
![]() Join Date: Sep 2009
Location: South
Posts: 2,792
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![]() Was it doing this before you rebuilt the engine ?
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#3 |
Test before replacing
![]() Join Date: Aug 2013
Location: Ohio side of the Pennsylvania border.
Posts: 3,308
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![]() That is terrible compression. You should be above 150.
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#4 |
Gone Wild
![]() Join Date: Feb 2010
Location: Citrus Springs, FL
Posts: 412
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![]() Did you check compression WOT
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#5 |
Gone Wild
![]() Join Date: Dec 2010
Location: Woodstock,GA
Posts: 1,088
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![]() 1 check fan is pulling air and air flow is not obstructed
2 check timing, if timing is off that can create heat and loss of compression. 3 does muffler flow good? 4 is engine trying to lock up If you rebuilt the engine and only have 100 psi compression, there is an issue. |
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#6 |
Not Yet Wild
Join Date: Jun 2018
Posts: 1
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![]() I think gearhead nailed it....timing belt is off a cog.
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