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Jan 23rd, 2013
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Outboard Question and ISO Mercury #12604671
02/01/18 02:28 AM
02/01/18 02:28 AM
Joined: Nov 2016
Posts: 324
F
FXfromTx Offline OP
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FXfromTx  Offline OP
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Joined: Nov 2016
Posts: 324
Asking question for a family member... 1997 Mercury 115 wouldn't start. Compression check shows top 2 cylinders have compression of 90. If there is a crack between these cylinders only option is a new powerhead, correct?

On that note, rather than spending $3,000 on a powerhead does anybody know of any 75-150HP Mercury outboards for sale?


"The fishing was good; it was the catching that was bad."
Re: Outboard Question and ISO Mercury [Re: FXfromTx] #12604716
02/01/18 02:55 AM
02/01/18 02:55 AM
Joined: Jul 2007
Posts: 636
Texas
NITRO Z8 Offline
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NITRO Z8  Offline
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Joined: Jul 2007
Posts: 636
Texas
Call Charlies out board shop in Alvarado and talk to either Charlie, Keith or son and they could tell you what they have and you can bet the engines will be in top shape.

Re: Outboard Question and ISO Mercury [Re: FXfromTx] #12605064
02/01/18 02:14 PM
02/01/18 02:14 PM
Joined: Nov 2002
Posts: 3,748
Yantis, TX
Gamblinman Online content
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Gamblinman  Online Content
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Joined: Nov 2002
Posts: 3,748
Yantis, TX
What was the compression of the remaining cylinders and what leads you to think there is a crack between cylinders?

Re: Outboard Question and ISO Mercury [Re: FXfromTx] #12605080
02/01/18 02:20 PM
02/01/18 02:20 PM
Joined: Jan 2005
Posts: 6,054
Seadrift TX
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Pat Goff Online content
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Pat Goff  Online Content
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Seadrift TX
90 is not dead, it's sick.
It could be a simple power tune treatment could bring it back from it's carbon sick bed.


Pat Goff
Seadrift TX
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Re: Outboard Question and ISO Mercury [Re: FXfromTx] #12605269
02/01/18 04:17 PM
02/01/18 04:17 PM
Joined: May 2003
Posts: 11,496
Littlefield Tx & Lake A. H. US...
gary purdy Offline
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gary purdy  Offline
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Posts: 11,496
Littlefield Tx & Lake A. H. US...
Something is definitely wrong because those motors normally have 140lbs or better.


The world will not be destroyed by those who do evil, but by those who watch them without doing anything. Remember what He has done and remember that He is not done yet!-- GOD IS GOOD
Re: Outboard Question and ISO Mercury [Re: FXfromTx] #12606551
02/02/18 05:27 AM
02/02/18 05:27 AM
Joined: Nov 2016
Posts: 324
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FXfromTx Offline OP
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FXfromTx  Offline OP
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Posts: 324
Bottom 2 cylinders are 150lbs. Top 2 were only 90 and the mechanic that looked at it told him chances were it was cracked between the cylinders. Also said tearing it apart to make sure was going to cost more than it was worth, he should just find another mercury motor that will use all of the same controls. I would imagine it could be a bad head gasket, warped piston or something of that sort but the mechanic was sure it was a crack between the top two cylinders since it was those two side-by-side cylinders that had low compression. I'll relay the message and I would imagine he will have another mechanic actually tear it apart and fully diagnose. Thanks everyone!


"The fishing was good; it was the catching that was bad."
Re: Outboard Question and ISO Mercury [Re: FXfromTx] #12607162
02/02/18 04:59 PM
02/02/18 04:59 PM
Joined: Jan 2005
Posts: 6,054
Seadrift TX
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Pat Goff Online content
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Seadrift TX
I would get a second opinion. Cracked block would give a zero compression. Something else is going on.


Pat Goff
Seadrift TX
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Re: Outboard Question and ISO Mercury [Re: FXfromTx] #12607397
02/02/18 06:48 PM
02/02/18 06:48 PM
Joined: Mar 2010
Posts: 451
Corsicana, TX
Blake's Boats Online content
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Blake's Boats  Online Content
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Corsicana, TX
PM sent on 2001 150 XR6 for sale


Blake's Boats
Corsicana, TX 75110
(903) 872-1292
cell (903) 879-5985
www.blakesboatsales.com
Re: Outboard Question and ISO Mercury [Re: FXfromTx] #12607529
02/02/18 07:50 PM
02/02/18 07:50 PM
Joined: Jan 2005
Posts: 6,054
Seadrift TX
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Pat Goff Online content
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Seadrift TX
Quick look with a bore scope would end the mystery.


Pat Goff
Seadrift TX
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