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#11035009 - 08/11/15 10:33 AM Compression Test Question
tdavis184 Offline
Outdoorsman

Registered: 09/12/06
Posts: 128
Loc: Longview, Tx
1995 Mercury 200hp 2.5L Xri EFI
When doing a compression test on this engine, is there any special steps other than just hooking up the test gauge? Is throttle to be held open during test? Or any other step before performing the key turn?

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#11035049 - 08/11/15 10:48 AM Re: Compression Test Question [Re: tdavis184]
ssmith Offline
Extreme Angler

Registered: 11/22/07
Posts: 2552
Loc: scotland tx
let the motor warm up first

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#11035387 - 08/11/15 01:37 PM Re: Compression Test Question [Re: tdavis184]
gary purdy Offline
TFF Guru

Registered: 05/24/03
Posts: 10772
Loc: Littlefield Tx & Lake A. H. US...
Pull the kill switch and yes to full throttle will give more accurate reading after warm up.
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“The world will not be destroyed by those who do evil, but by those who watch them without doing anything” GOD IS GOOD

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#11035411 - 08/11/15 01:46 PM Re: Compression Test Question [Re: tdavis184]
tdavis184 Offline
Outdoorsman

Registered: 09/12/06
Posts: 128
Loc: Longview, Tx
Thanks fellas.

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#11035453 - 08/11/15 02:12 PM Re: Compression Test Question [Re: tdavis184]
steve@scp Offline
TFF Celebrity

Registered: 08/25/06
Posts: 6647
Loc: Quitman,Tx
do leak down test also.

tells you a lot more about the condition of the cylinders with pistons at top dead center.
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