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#11126671 - 09/25/15 08:52 AM 1998 mercury 200 efi
johnathonmharding Offline
Outdoorsman

Registered: 01/14/15
Posts: 161
Loc: Houston county, Grapeland
Does 98 merc 200 efi have thermostat? Boat is peeing water just fine its just really hot when its coming out, gauge isnt showing its over heating
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#11126880 - 09/25/15 09:57 AM Re: 1998 mercury 200 efi [Re: johnathonmharding]
steve@hydrodynamics Offline
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Registered: 08/25/06
Posts: 6728
Loc: Quitman,Tx
yes. one on topside of each head.
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#11127034 - 09/25/15 10:59 AM Re: 1998 mercury 200 efi [Re: steve@hydrodynamics]
johnathonmharding Offline
Outdoorsman

Registered: 01/14/15
Posts: 161
Loc: Houston county, Grapeland
Easy to diy?
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#11129088 - 09/26/15 02:44 PM Re: 1998 mercury 200 efi [Re: johnathonmharding]
Ricky Taylor Offline
Extreme Angler

Registered: 10/19/14
Posts: 1855
Loc: Midlothian, Texas
Very easy.

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#11129247 - 09/26/15 04:22 PM Re: 1998 mercury 200 efi [Re: johnathonmharding]
heybaylor Online   content
Extreme Angler

Registered: 01/24/05
Posts: 1748
Loc: Lake Fork
Originally Posted By: johnathonmharding
Does 98 merc 200 efi have thermostat? Boat is peeing water just fine its just really hot when its coming out, gauge isnt showing its over heating


sounds like you don't have a problem.
how do you know it is hot ? gauge, or your finger.
at idle it is about 130-140 out of the thermo's
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#11129250 - 09/26/15 04:23 PM Re: 1998 mercury 200 efi [Re: johnathonmharding]
RangerBass21 Offline
Extreme Angler

Registered: 01/09/15
Posts: 2210
Loc: Plano
Isn't it suppose to be hot water coming out? It just cooled a hot engine
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#11130061 - 09/26/15 11:00 PM Re: 1998 mercury 200 efi [Re: johnathonmharding]
Team Brown Stripe Offline
Extreme Angler

Registered: 04/25/07
Posts: 2165
Loc: Carrollton, Texas
Should be warm to the touch but not steaming hot.
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#11130109 - 09/27/15 04:40 AM Re: 1998 mercury 200 efi [Re: johnathonmharding]
johnathonmharding Offline
Outdoorsman

Registered: 01/14/15
Posts: 161
Loc: Houston county, Grapeland
Went ahead dropped lower unit changed out impeller now waitn for water pump base assembly it was kinda warped from gettn 2 hot
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