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Mercury 200 efi running hot #11868571 10/07/16 01:33 AM
Joined: Aug 2016
Posts: 44
Badbassdad Offline OP
Outdoorsman
OP Offline
Outdoorsman
Joined: Aug 2016
Posts: 44
I have a 97 mercury 200 efi, I have had it for 6 weeks. it runs great when we get it off the trailer and get on plane... but after a couple of runs it "bogs" down... only gets to about 2k rpm.. and hesitates... for a few minutes and then goes back and forth... alarm works when we turn the key on but no beeps after we get going... I dont know what it is...

Re: Mercury 200 efi running hot [Re: Badbassdad] #11868634 10/07/16 02:26 AM
Joined: May 2016
Posts: 151
rongleaves Offline
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Joined: May 2016
Posts: 151
Completely misread this post.....sorry, my comment was totally irrelevant.

Last edited by rongleaves; 10/08/16 04:08 AM.
Re: Mercury 200 efi running hot [Re: Badbassdad] #11868707 10/07/16 04:16 AM
Joined: Apr 2015
Posts: 1,818
Curtbass Offline
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Joined: Apr 2015
Posts: 1,818
When's the last time thermostats were replaced? Poppet valve? Water pump impeller? I've got a guru Merc mechanic if you want to pm me. Just rebuilt my 94' 2.5 200 Efi...


ELITE POWER SYSTEMS/ Elite Fishing Products
Lithium Battery & Charging Systems, Soft Plastics, Tackle,Tokyo Rigs
Tight lines & stay safe out there.Gods blessings
Re: Mercury 200 efi running hot [Re: Badbassdad] #11868929 10/07/16 01:33 PM
Joined: Jul 2010
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B
boatman025 Offline
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Joined: Jul 2010
Posts: 1,336
I could look at it for you Im on west side of McKinney


Hughes Marine
3855 Osage Lane
Wylie ,Texas
Re: Mercury 200 efi running hot [Re: Badbassdad] #11870228 10/08/16 01:33 AM
Joined: Jun 2004
Posts: 1,509
O
OPTI Offline
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Joined: Jun 2004
Posts: 1,509
Possible ignition problem. Switch box or trigger you say it goes back and fourth is a gradual or instant change if gradual it is a fuel problem and if it is a instant change it is ignition.If it was a heat problem you would get a warning and if it was heat it would bog down till it quit running and it would not pick up and run if it was heat. One other thing if you have a gray fuel line running to engine the inner liner could be collapsing and blocking fuel flow.....OPTI

Last edited by OPTI; 10/08/16 01:34 AM.
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