texasfishingforum.com logo
Main Menu
Advertisement
Affiliates
Advertisement
Newest Members
Bassmaster1990, ccboles, schilds, Fishingchick82, GulfCoastDon2020
111552 Registered Users
Top Posters(All Time)
TexDawg 92,173
hopalong 82,415
Pilothawk 79,001
John175☮ 74,053
JDavis7873 67,397
Derek 🐝 63,278
Bigbob_FTW 60,624
Tritonman 58,794
Mark Perry 57,672
facebook
Forum Statistics
Forums60
Topics764,881
Posts9,622,995
Members111,552
Most Online36,273
Jan 23rd, 2013
Print Thread
2001 Mercury 200 EFI overtemp alarm #10620905 02/16/15 12:36 AM
Joined: Jun 2013
Posts: 81
F
FHL777 Offline OP
Outdoorsman
OP Offline
Outdoorsman
F
Joined: Jun 2013
Posts: 81
I took boat out yesterday to test engine, as boat has been sitting about 3 years. I got on plane then constant horn went off so I shut it down. Once engined cooled it would start up but had no power. Water was coming out of witness and i pulled thermostats today and tested in hot water. Anyone have experience with this issue?


"90 percent of the fish congregate in 10 percent of the water"
Re: 2001 Mercury 200 EFI overtemp alarm [Re: FHL777] #10621152 02/16/15 02:33 AM
Joined: Nov 2006
Posts: 2,519
T
TLW Online Content
Extreme Angler
Online Content
Extreme Angler
T
Joined: Nov 2006
Posts: 2,519
do a compression test first thing. did it have power before it got hot?

Re: 2001 Mercury 200 EFI overtemp alarm [Re: FHL777] #10621908 02/16/15 02:50 PM
Joined: Mar 2010
Posts: 376
Big Kel Offline
Angler
Offline
Angler
Joined: Mar 2010
Posts: 376
I agree with TLW, do a compression test first. If that checks out, then immediately replace the impeller (water pump) and the lower unit oil. Then drain all the fuel and replace the filters. If you had fuel with ethanol in it, it goes bad and separates after about 6 months.

Sounds like the impeller (water pump) was bad and caused the motor to over heat, that is why I change my impeller at the beginning of every year. The Merc's have a very small impeller to begin with, so changing them often is a must. Letting one set 3 years is not good at all, they will normally weather rot and break apart or get weak and will not pump enough water.

Re: 2001 Mercury 200 EFI overtemp alarm [Re: FHL777] #10621954 02/16/15 03:04 PM
Joined: May 2003
Posts: 11,554
gary purdy Online Content
TFF Guru
Online Content
TFF Guru
Joined: May 2003
Posts: 11,554
You most likely will have to get the fuel system serviced from setting. Replace the water pump.


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: 2001 Mercury 200 EFI overtemp alarm [Re: FHL777] #10621975 02/16/15 03:12 PM
Joined: Jun 2013
Posts: 81
F
FHL777 Offline OP
Outdoorsman
OP Offline
Outdoorsman
F
Joined: Jun 2013
Posts: 81
Engine did have power before alarm. I will replace impeller and check out fuel system. Thanks for the advice guys! Will the guardian system automatically reset?

Last edited by FHL777; 02/16/15 03:13 PM.

"90 percent of the fish congregate in 10 percent of the water"
Re: 2001 Mercury 200 EFI overtemp alarm [Re: FHL777] #10623108 02/16/15 09:47 PM
Joined: Nov 2006
Posts: 2,519
T
TLW Online Content
Extreme Angler
Online Content
Extreme Angler
T
Joined: Nov 2006
Posts: 2,519
Originally Posted By: FHL777
Engine did have power before alarm. I will replace impeller and check out fuel system. Thanks for the advice guys! Will the guardian system automatically reset?


do tha test before ya spend any money on parts!!! there is NO guardian mode on that motor....

Re: 2001 Mercury 200 EFI overtemp alarm [Re: FHL777] #10623358 02/16/15 11:23 PM
Joined: Mar 2010
Posts: 10,200
T Bird Online Content
TFF Guru
Online Content
TFF Guru
Joined: Mar 2010
Posts: 10,200
Also check for water leaks under cowling at heads, t-stats and hoses.


[Linked Image]
Alumni 1985-1989

Okie by birth, Texan by choice.
Re: 2001 Mercury 200 EFI overtemp alarm [Re: FHL777] #10624190 02/17/15 03:59 AM
Joined: Mar 2010
Posts: 376
Big Kel Offline
Angler
Offline
Angler
Joined: Mar 2010
Posts: 376
Yes, do the compression test first before spending any money. Takes about 10 minutes and if it has a bad cylinder, will require a complete rebuild which will be expensive.

If needs a rebuild, let me know I have a friend who will either rebuild it for you or buy it from you. But hopefully it not that bad.

Re: 2001 Mercury 200 EFI overtemp alarm [Re: FHL777] #10624232 02/17/15 04:18 AM
Joined: Oct 2003
Posts: 849
J
Jobie99 Offline
Pro Angler
Offline
Pro Angler
J
Joined: Oct 2003
Posts: 849
I changed an impeller myself on a 150 efi by watching a video on YouTube. Whole thing took about an hour and a half. I'm not the most mechaically inclined guy in the world either.

Previous Thread
Index
Next Thread


© 1998-2019 OUTDOOR SITES NETWORK all rights reserved USA and Worldwide
Powered by UBB.threads™ PHP Forum Software 7.7.3