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#11159106 - 10/12/15 11:01 AM Compression Test on 225
bFROG5 Offline
Angler

Registered: 05/24/15
Posts: 392
Loc: Fort Worth, TX.
What should the compression range be for a 225 merc?
Is 160 on all cylinders too high? 160 is what came back on a boat I've been looking at.


Edited by bFROG5 (10/12/15 11:02 AM)
_________________________
Matthew 4:19

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#11159504 - 10/12/15 02:45 PM Re: Compression Test on 225 [Re: bFROG5]
dimitri Online   content
Extreme Angler

Registered: 08/12/09
Posts: 2114
Loc: Arlington TX
if its an efi it should be 90-110. not sure about others.

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#11159514 - 10/12/15 02:51 PM Re: Compression Test on 225 [Re: bFROG5]
ssmith Offline
Extreme Angler

Registered: 11/22/07
Posts: 2807
Loc: scotland tx
you need to check your gauge.

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#11159814 - 10/12/15 04:57 PM Re: Compression Test on 225 [Re: bFROG5]
Ken A. Offline
TFF Celebrity

Registered: 10/02/06
Posts: 8318
Loc: Trophy Club, TX
Sounds high unless the previous owner milled the heads. I would look for 110-125

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